Toxicity of water-soluble D-g-PNIPAM polymers in a complex with chemotherapy drugs and mechanism of their action in vitro. - In: International journal of molecular sciences, ISSN 1422-0067, Bd. 25 (2024), 5, 3069, S. 1-15
The application of a biocompatible polymer nanocarrier can provide target delivery to tumor tissues, improved pharmacokinetics, controlled drug release, etc. Therefore, the proposed strategy was to use the water-soluble star-like copolymers with a Dextran core and Poly(N-isopropylacrylamide) grafts (D-g-PNIPAM) for conjugation with the widely used chemotherapy drugs in oncology-Cisplatin (Cis-Pt) and Doxorubicin (Dox). The molecular characteristics of the copolymer were received using size-exclusion chromatography. The physicochemical characterization of the D-g-PNIPAM-Cis-Pt (or Dox) nanosystem was conducted using dynamic light scattering and FTIR spectroscopy. Using traditional biochemical methods, a comparative analysis of the enhancement of the cytotoxic effect of free Cis-Pt and Dox in combination with D-g-PNIPAM copolymers was performed in cancer cells of the Lewis lung carcinoma line, which are both sensitive and resistant to Dox; in addition, the mechanism of their action in vitro was evaluated.
https://doi.org/10.3390/ijms25053069
Antimetastatic lung cancer therapy using alkaloid Piperlongumine noncovalently bound to С60 fullerene. - In: Journal of drug delivery science and technology, Bd. 92 (2024), 105275, S. 1-10
A novel nanoformulation, C60 fullerene loaded with a plant alkaloid Piperlongumine (PL) molecules (C60-PL nanocomplex), as a potential drug for the treatment of highly metastatic lung cancer was created and characterized by using ultrasonic technology, computer simulation, atomic force and scanning tunneling microscopy. The aim of the study was to evaluate the antimetastatic potential of PL alone and the C60-PL nanocomplex using Lewis lung carcinoma (LLC) cell line as a model. Evidence has been obtained that the 2:1C60-PL nanocomplex is a potent agent capable of effectively reducing the survival, migration and invasion of LLC cells in vitro, as well as tumor growth and metastasis in vivo compared to free PL. These effects in cell behavior were shown to be associated with an increased Bax expression and high level of cleaved PARP confirming the proapototic potential of C60-PL nanocomplex as well as down-regulation of the mRNA of epithelial-mesenchymal transition regulator Twist1 and cancer stem cell marker CD44, a reduced level of phosphorylated mTOR and adaptor protein Ruk/CIN85. Histological analysis of the lung tissue of LLC-bearing mice showed that in animals that received the C60-PL nanocomplex, the regression of metastases prevailed over their growth. The obtained results allow to conclude that the proposed C60-PL nanocomplex represents a promising drug for the treatment of metastatic lung cancer.
https://doi.org/10.1016/j.jddst.2023.105275
Toward photodynamic cancer chemotherapy with C60-Doxorubicin nanocomplexes. - In: Nanomaterials for photodynamics therapy, (2023), S. 489-522
Recent progress in nanotechnology has attracted interest to a biomedical application of the carbon nanoparticle C60 fullerene (C60) due to its unique structure and versatile biological activity. The dual functionality of C60 as a photosensitizer and a drug nanocarrier sets an opportunity to improve the efficiency of chemotherapeutic drugs for cancer cells. Pristine C60 demonstrates time-dependent accumulation with predominant mitochondrial localization in cancer cells. Nanomolar amounts of C60-drug nanocomplexes in 1:1 and 2:1 molar ratios improve the efficiency of cell treatment, complementing it with photodynamic approach. The cooperative enhancement interactions between mechanisms of chemo- and photodynamic therapies contribute to the obtained synergistic effect (namely “1+1>2”). A strong synergy of treatments arising from the combination of C60-mediated drug delivery and C60 photoexcitation indicates that a combination of chemo- and photodynamic treatments with C60-drug nanoformulations could provide a promising synergetic approach for cancer treatment.
https://doi.org/10.1016/B978-0-323-85595-2.00005-0
Comparison of sonodynamic treatment set-ups for cancer cells with organic sonosensitizers and nanosonosensitizers. - In: Pharmaceutics, ISSN 1999-4923, Bd. 15 (2023), 11, 2616, S. 1-21
Cancer sonodynamic therapy (SDT) is the therapeutic strategy of a high-frequency ultrasound (US) combined with a special sonosensitizer that becomes cytotoxic upon US exposure. The growing number of newly discovered sonosensitizers and custom US in vitro treatment solutions push the SDT field into a need for systemic studies and reproducible in vitro experimental set-ups. In the current research, we aimed to compare two of the most used and suitable SDT in vitro set-ups - “sealed well” and “transducer in well” - in one systematic study. We assessed US pressure, intensity, and temperature distribution in wells under US irradiation. Treatment efficacy was evaluated for both set-ups towards cancer cell lines of different origins, treated with two promising sonosensitizer candidates - carbon nanoparticle C60 fullerene (C60) and herbal alkaloid berberine. C60 was found to exhibit higher sonotoxicity toward cancer cells than berberine. The higher efficacy of sonodynamic treatment with a “transducer in well” set-up than a “sealed well” set-up underlined its promising application for SDT in vitro studies. The “transducer in well” set-up is recommended for in vitro US treatment investigations based on its US-field homogeneity and pronounced cellular effects. Moreover, SDT with C60 and berberine could be exploited as a promising combinative approach for cancer treatment.
https://doi.org/10.3390/pharmaceutics15112616
C60 fullerene reduces the level of fluctuations in the force response of muscle gastrocnemius in chronically alcoholized rats. - In: Applied nanoscience, ISSN 2190-5517, Bd. 13 (2023), 10, S. 7057-7067
The biomechanical parameters of muscle gastrocnemius contraction and biochemical parameters of blood and muscle tissue in rats after chronic alcoholization for 3, 6, and 9 months were studied. The oral administration of C60 fullerene aqueous solution (C60FAS) at doses of 0.5, 1, and 2 mg/kg throughout the experiment was used as a therapeutic agent. C60FAS in each of the experimental groups was administered in three ways: 1 h before alcohol intake, together with alcohol, and 1 h after alcohol intake. The most significant positive effects were recorded when alcohol and C60FAS were administered together at the optimal dose of 1 mg/kg. So, the increase in muscle gastrocnemius contraction force was 20 ± 1%, 33 ± 2% and 65 ± 3% (p < 0.05) compared with control at 3, 6, and 9 months alcoholization, respectively, as well as a high level of its fluctuations correction was observed throughout the experiment. Biochemical parameters such as blood levels of creatinine, creatine phosphokinase, lactate and lactate dehydrogenase as well as pro- and antioxidant balance (content of hydrogen peroxide and reduced glutathione, as well as catalase, selenium-dependent glutathione peroxidase and superoxide dismutase activities) in muscle gastrocnemius tissues decreased from 15 ± 2% (3 months of alcoholization) to 45 ± 2% (9 months of alcoholization) (p < 0.05) compared to controls. The results indicate promising prospects for the use of water-soluble C60 fullerenes, as powerful antioxidants, for the correction of pathological conditions of the muscular system arising from alcohol intoxication.
https://doi.org/10.1007/s13204-023-02874-7
The effect of C60 fullerene on the mechanokinetics of muscle gastrocnemius contraction in chronically alcoholized rats. - In: Heliyon, ISSN 2405-8440, Bd. 9 (2023), 8, e18745, S. 1-10
The C60 fullerene effect (oral administration at a dose of 1 mg kg−1) on the selected biomechanical parameters of muscle gastrocnemius contraction, biochemical indicators of blood and muscle tissue as well as histological changes in rat muscle tissue after chronic alcoholization for 3, 6 and 9 months was studied in detail. Water-soluble C60 fullerenes were shown to reduce the pathological processes development in the muscle apparatus by an average of (35-40)%. In particular, they reduced the time occurrence of fatigue processes in muscle during the long-term development of alcoholic myopathy and inhibited oxidative processes in muscle, thereby preventing its degradation. These findings open up the possibility of using C60 fullerenes as potent antioxidants for the correction of the pathological conditions of the muscle system arising from alcohol intoxication.
https://doi.org/10.1016/j.heliyon.2023.e18745
Water-soluble pristine C60 fullerenes attenuate isometric muscle force reduction in a rat acute inflammatory pain model. - In: BMC musculoskeletal disorders, ISSN 1471-2474, Bd. 24 (2023), 606, S. 1-8
Background: Being a scavenger of free radicals, C60 fullerenes can influence on the physiological processes in skeletal muscles, however, the effect of such carbon nanoparticles on muscle contractility under acute muscle inflammation remains unclear. Thus, the aim of the study was to reveal the effect of the C60 fullerene aqueous solution (C60FAS) on the muscle contractile properties under acute inflammatory pain. Methods: To induce inflammation a 2.5% formalin solution was injected into the rat triceps surae (TS) muscle. High-frequency electrical stimulation has been used to induce tetanic muscle contraction. A linear motor under servo-control with embedded semi-conductor strain gauge resistors was used to measure the muscle tension. Results: In response to formalin administration, the strength of TS muscle contractions in untreated animals was recorded at 23% of control values, whereas the muscle tension in the C60FAS-treated rats reached 48%. Thus, the treated muscle could generate 2-fold more muscle strength than the muscle in untreated rats. Conclusions: The attenuation of muscle contraction force reduction caused by preliminary injection of C60FAS is presumably associated with a decrease in the concentration of free radicals in the inflamed muscle tissue, which leads to a decrease in the intensity of nociceptive information transmission from the inflamed muscle to the CNS and thereby promotes the improvement of the functional state of the skeletal muscle.
https://doi.org/10.1186/s12891-023-06719-w
Tailoring the weight of surface and intralayer edge states to control LUMO energies. - In: Advanced materials, ISSN 1521-4095, Bd. 35 (2023), 40, 2305006, S. 1-11
The energies of the frontier molecular orbitals determine the optoelectronic properties in organic films, which are crucial for their application, and strongly depend on the morphology and supramolecular structure. The impact of the latter two properties on the electronic energy levels relies primarily on nearest-neighbor interactions, which are difficult to study due to their nanoscale nature and heterogeneity. Here, an automated method is presented for fabricating thin films with a tailored ratio of surface to bulk sites and a controlled extension of domain edges, both of which are used to control nearest-neighbor interactions. This method uses a Langmuir–Schaefer-type rolling transfer of Langmuir layers (rtLL) to minimize flow during the deposition of rigid Langmuir layers composed of π-conjugated molecules. Using UV–vis absorption spectroscopy, atomic force microscopy, and transmission electron microscopy, it is shown that the rtLL method advances the deposition of multi-Langmuir layers and enables the production of films with defined morphology. The variation in nearest-neighbor interactions is thus achieved and the resulting systematically tuned lowest unoccupied molecular orbital (LUMO) energies (determined via square-wave voltammetry) enable the establishment of a model that functionally relates the LUMO energies to a morphological descriptor, allowing for the prediction of the range of accessible LUMO energies.
https://doi.org/10.1002/adma.202305006
Cholesterin aus Hirn. - In: Nachrichten aus der Chemie, ISSN 1439-9598, Bd. 71 (2023), 1, S. 30-32
Cholesterin hat es bis in den Alltagssprachgebrauch gebracht. Allein deshalb ist es für Praktika im Chemiestudium ein interessanter Vertreter der Steroide. Zudem ist es einfach zu gewinnen.
Cholesterin aus Hirn. - In: Nachrichten aus der Chemie, ISSN 1868-0054, Bd. 71 (2023), 1, S. 30-32
Cholesterin hat es bis in den Alltagssprachgebrauch gebracht. Allein deshalb ist es für Praktika im Chemiestudium ein interessanter Vertreter der Steroide. Zudem ist es einfach zu gewinnen.
https://doi.org/10.1002/nadc.20234132329
Application of nitrogen-doped multi-walled carbon nanotubes decorated with gold nanoparticles in biosensing. - In: Journal of solid state electrochemistry, ISSN 1433-0768, Bd. 27 (2023), 10, S. 2645-2658
Novel films consisting of nitrogen-doped multi-walled carbon nanotubes (N-MWCNTs) were fabricated by means of chemical vapor deposition technique and decorated with gold nanoparticles (AuNPs) possessing diameter of 14.0 nm. Electron optical microscopy analysis reveals that decoration of N-MWCNTs with AuNPs does not have any influence on their bamboo-shaped configuration. The electrochemical response of fabricated composite films, further denoted as N-MWCNTs/AuNPs, towards oxidation of dopamine (DA) to dopamine-o-quinone (DAQ) in the presence of ascorbic acid (AA) and uric acid (UA) was probed in real pig serum by means of cyclic voltammetry (CV) and square wave voltammetry (SWV). The findings demonstrate that N-MWCNTs/AuNPs exhibit slightly greater electrochemical response and sensitivity towards DA/DAQ compared to unmodified N-MWCNTs. It is, consequently, obvious that AuNPs improve significantly the electrochemical response and detection ability of N-MWCNTs. The electrochemical response of N-MWCNTs/AuNPs towards DA/DAQ seems to be significantly greater compared to that of conventional electrodes, such as platinum and glassy carbon. The findings reveal that N-MWCNTs/AuNPs could serve as powerful analytical sensor enabling analysis of DA in real serum samples.
https://doi.org/10.1007/s10008-023-05562-2
Synthesis and electrochemical properties of sulfur-nitrogen-doped multi-walled carbon nanotubes. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 31 (2023), 11, S. 1082-1095
Multi-walled carbon nanotubes doped with sulfur and nitrogen (S-N-MWCNTs) were grown onto silicon/silicon oxide wafer by means of chemical vapor deposition upon decomposition of dimethyl sulfoxide (DMSO) and acetonitrile (ACN) in presence of catalyst. The S-N-MWCNTs were characterized by scanning electron microscopy combined with energy dispersive X-ray spectroscopy. The findings demonstrate that S-N-MWCNTs exhibit bamboo-shaped nanostructure, quite similar to pure nitrogen-doped carbon nanotubes. The S-N-MWCNTs were investigated with respect to their electrochemical response to ferrocyanide/ferricyanide, [Fe(CN)6]4-/3- in potassium chloride aqueous solutions by means of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques. The recorded CVs demonstrate strong dependence of electrochemical response, electron transfer kinetics, and sensitivity of S-N-MWCNTs on concentration of decomposed DMSO precursor. Namely, upon increasing concentration of decayed DMSO up to 2% wt. the current density, the electron transfer kinetics, and the sensitivity of S-N-MWCNTs toward [Fe(CN)6]4-/3- tend to enhance. The extracted EIS results approve that when DMSO reaches the optimum concentration of 2% wt. the barrier for electron transfer decreases significantly leading, consequently, to faster electron transfer kinetics. The S-N-MWCNTs exhibit considerable stability and excellent reproducibility, and thus it can be considered suitable analytical tool for detection of redox systems at micromolar level.
https://doi.org/10.1080/1536383X.2023.2240916
Structural and optical properties of C70 fullerenes in aqueous solution. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 31 (2023), 10, S. 983-988
The simple method of preparation of highly stable and purified C70 fullerene aqueous solution (C70FAS) is proposed. The features of structural stabilization of C70 fullerenes in an aqueous solution by studying their structural and optical properties using Raman, photoluminescence, infrared reflection-absorption, UV-VIS absorption, and dynamic light scattering spectroscopy methods were analyzed. The experimental results showed that the most likely mechanism for C70 fullerenes stabilization in water is surface hydroxylation with covalent attachment of water hydroxyls to C70 fullerene carbons. Raman and infrared absorption spectra of C70FAS showed characteristic vibrational bands of C70 fullerenes with a slight broadening and low-frequency shift of ∼1 cm^−1, indicating the attachment of water hydroxyls to the C70 fullerene carbons. The photoluminescence spectra showed excitonic emission bands of C70 molecules with intensity depending on their content. UV-VIS absorption spectra demonstrate the absorption bands typical for monomeric C70 fullerene. Finally, the dynamic light scattering data confirmed that C70FAS is a typical colloidal fluid containing both individual C70 molecules and their nano aggregates up to 100 nm. These findings provide insights into the stabilization mechanism of C70 fullerenes in water and may have implications for their potential application in nanobiotechnology.
https://doi.org/10.1080/1536383X.2023.2229461
Synthesis, characterization, and electrochemical performance of reduced graphene oxide decorated with Ag, ZnO, and AgZnO nanoparticles. - In: Carbon, ISSN 1873-3891, Bd. 213 (2023), 118178
Graphene oxide (GO) derived from the oxidization of graphite exhibits high specific surface area with potential in electrochemical applications. Furthermore, silver and zinc oxide nanoparticles, further denoted as AgNPs and ZnONPs, respectively, display superior physicochemical and electronic properties, that would significantly improve the electrocatalytic properties by being applied in electrochemical sensing. Consequently, in the present work, three different hybrid nanomaterials consisting of reduced graphene oxide (rGO) modified with either AgNPs, ZnONPs, or combined AgZnONPs were synthesized and characterized. The synthesis of GO was performed by a modified Hummer's method, while the decoration of GO with the nanoparticles was carried out by self-assembly solvothermal processes. The Ag-rGO, ZnO-rGO, and AgZnO-rGO nanocomposite hybrid materials were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), Raman spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) combined with energy-dispersive X-ray spectroscopy (EDX). Furthermore, the electrochemical responses of the fabricated nanocomposites towards the standard ferrocyanide/ferricyanide [Fe(CN)6]3-/4- redox system were investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques. The results have been explained in terms of structural differences between the nanoparticles formed on the surface of the fabricated nanocomposite materials. Namely, the improved electrochemical performance of ZnO-rGO can be attributed to the high surface to volume ratio of ZnO, which provides greater area of electrode/electrolyte junction and consequently, large number of sites at the electrolyte-ZnO interface. The aim of the present work is the fabrication of novel high-performance rGO-based nanomaterials for applications in electrochemical sensing.
https://doi.org/10.1016/j.carbon.2023.118178
Fullerene C60 films on dental implants: durability study after in vitro short-term exposure. - In: Diamond and related materials, ISSN 0925-9635, Bd. 135 (2023), 109886
The carbon fullerene C60 is an anti-inflammatory substance that reduces cellular stress levels. In this study, C60 fullerenes were deposited on complex dental implants to improve cell attachment and vitality. For the first time, fullerene C60 films were deposited via high-vacuum sublimation on complex-shaped Ti-6Al-4V dental implants with a threaded-screw design. The “as-deposited” fullerene C60 films were compared with fullerene C60 films on dental Ti-6Al-4V implants using a threaded-screw design after three weeks of incubation in Hank's balanced salt solution (HBSS). It was proven by Raman spectroscopy that the incubation in potassium and alkali-ion rich HBSS at 37 ˚C resulted in a reduction of monomeric fullerene C60 fraction and an increase in dimer, linear chain and polymerized C60 molecules. Furthermore, the structure of the C60 films differed depending on the measurement position on dental implants with a threaded-screw design. The fraction of monomeric fullerene C60 was highest on top of the trapezoidal thread, which had a micropatterned topography. Nano-indentations were performed at this position with a maximum load of 1000 μN. The fullerene C60 films showed a nano-hardness of 0.3 ± 0.1 GPa and a Young's modulus of 7.6 ± 3.6 GPa at this position, which is typical for monomeric fullerene C60 with weak interatomic interaction in the face-centred-cubic crystal structure. The murine embryonal calvarial stem-cell line MC3T3-E1 (ECACC, UK), which is driven toward osteogenic differentiation, spread out extremely well on the fullerene C60 film, with improved cell morphology compared to uncoated Ti-6Al-4V. Cell nuclei density were determined to be 237.5 cell nuclei per mm2 for the Ti-6Al-4V dental implants with a threaded-screw design with fullerene C60 coating in “as-deposited” condition. This was approximately 40 % better than that of uncoated Ti-6Al-4V dental implants with a threaded-screw design.
https://doi.org/10.1016/j.diamond.2023.109886
Silent death by sound: C60 fullerene sonodynamic treatment of cancer cells. - In: International journal of molecular sciences, ISSN 1422-0067, Bd. 24 (2023), 2, 1020, S. 1-17
The acoustic pressure waves of ultrasound (US) not only penetrate biological tissues deeper than light, but they also generate light emission, termed sonoluminescence. This promoted the idea of its use as an alternative energy source for photosensitizer excitation. Pristine C60 fullerene (C60), an excellent photosensitizer, was explored in the frame of cancer sonodynamic therapy (SDT). For that purpose, we analyzed C60 effects on human cervix carcinoma HeLa cells in combination with a low-intensity US treatment. The time-dependent accumulation of C60 in HeLa cells reached its maximum at 24 h (800 ± 66 ng/106 cells). Half of extranuclear C60 is localized within mitochondria. The efficiency of the C60 nanostructure’s sonoexcitation with 1 MHz US was tested with cell-based assays. A significant proapoptotic sonotoxic effect of C60 was found for HeLa cells. C60′s ability to induce apoptosis of carcinoma cells after sonoexcitation with US provides a promising novel approach for cancer treatment.
https://doi.org/10.3390/ijms24021020
Application of carbon-based quantum dots in photodynamic therapy. - In: Carbon, ISSN 1873-3891, Bd. 203 (2023), S. 273-310
Photodynamic Therapy (PDT) is a non-invasive therapeutic modality that can treat a wide variety of cancer types by means of photosensitizer drug, light, and oxygen. Due to enhanced specificity and fewer side effects, PDT can be an alternative approach for cancer treatments. However, conventional photosensitizers (PSs) exhibit low selectivity, hydrophobicity, and limited photophysical properties. Nanotechnology emerges as a potential solution to these issues and improves PDT efficiency. Nanomaterials such as Carbon Quantum Dots (CQDs) and Graphene Quantum Dots (GrQDs) have been widely applied on PDT research recently, regarding their excellent photoluminescence properties, biocompatibility, as well as their hydrophilicity. The present review article summarizes the main features of PDT and carbon-based quantum dots with an emphasis on used PSs and methods for synthesis of carbon dots. Additionally, the most recent applications of CQDs and GrQDs in PDT have been extensively discussed. The main conclusion that arises is that carbon-based quantum dots seem to be a powerful tool in cancer diagnosis and treatment.
https://doi.org/10.1016/j.carbon.2022.11.026
The residual effect of C60 fullerene on biomechanical and biochemical markers of the muscle soleus fatigue development in rats. - In: Journal of nanomaterials, ISSN 1687-4129, Bd. 2023 (2023), e2237574, S. 1-11
Muscle fatigue as a defense body mechanism against overload is a result of the products of incomplete oxygen oxidation such as reactive oxygen species. Hence, C60 fullerene as a powerful nanoantioxidant can be used to speed up the muscle recovery process after fatigue. Here, the residual effect of C60 fullerene on the biomechanical and biochemical markers of the development of muscle soleus fatigue in rats for 2 days after 5 days of its application was studied. The known antioxidant N-acetylcysteine (NAC) was used as a comparison drug. The atomic force microscopy to determine the size distribution of C60 fullerenes in an aqueous solution, the tensiometry of skeletal muscles, and the biochemical analysis of their tissues and rat blood were used in this study. It was found that after the cessation of NAC injections, the value of the integrated muscle power is already slightly different from the control (5%-7%) on the first day, and on the second day, it does not significantly differ from the control. At the same time, after the cessation of C60 fullerene injections, its residual effect was 45%-50% on the first day, and 17%-23% of the control on the second one. A significant difference (more than 25%) between the pro- and antioxidant balance in the studied muscles and blood of rats after the application of C60 fullerene and NAС plays a key role in the long-term residual effect of C60 fullerene. This indicates prolonged kinetics of C60 fullerenes elimination from the body, which contributes to their long-term (at least 2 days) compensatory activation of the endogenous antioxidant system in response to muscle stimulation, which should be considered when developing new therapeutic agents based on these nanoparticles.
https://doi.org/10.1155/2023/2237574
C60 fullerene attenuates muscle force reduction in a rat during fatigue development. - In: Heliyon, ISSN 2405-8440, Bd. 8 (2022), 12, e12449, S. 1-9
C60 fullerene (C60) as a nanocarbon particle, compatible with biological structures, capable of penetrating through cell membranes and effectively scavenging free radicals, is widely used in biomedicine. A protective effect of C60 on the biomechanics of fast (m. gastrocnemius) and slow (m. soleus) muscle contraction in rats and the pro- and antioxidant balance of muscle tissue during the development of muscle fatigue was studied compared to the same effect of the known antioxidant N-acetylcysteine (NAC). C60 and NAC were administered intraperitoneally at doses of 1 and 150 mg kg−1, respectively, daily for 5 days and 1 h before the start of the experiment. The following quantitative markers of muscle fatigue were used: the force of muscle contraction, the level of accumulation of secondary products of lipid peroxidation (TBARS) and the oxygen metabolite H2O2, the activity of first-line antioxidant defense enzymes (superoxide dismutase (SOD) and catalase (CAT)), and the condition of the glutathione system (reduced glutathione (GSH) content and the activity of the glutathione peroxidase (GPx) enzyme). The analysis of the muscle contraction force dynamics in rats against the background of induced muscle fatigue showed, that the effect of C60, 1 h after drug administration, was (15-17)% more effective on fast muscles than on slow muscles. A further slight increase in the effect of C60 was revealed after 2 h of drug injection, (7-9)% in the case of m. gastrocnemius and (5-6)% in the case of m. soleus. An increase in the effect of using C60 occurred within 4 days (the difference between 4 and 5 days did not exceed (3-5)%) and exceeded the effect of NAC by (32-34)%. The analysis of biochemical parameters in rat muscle tissues showed that long-term application of C60 contributed to their decrease by (10-30)% and (5-20)% in fast and slow muscles, respectively, on the 5th day of the experiment. At the same time, the protective effect of C60 was higher compared to NAC by (28-44)%. The obtained results indicate the prospect of using C60 as a potential protective nano agent to improve the efficiency of skeletal muscle function by modifying the reactive oxygen species-dependent mechanisms that play an important role in the processes of muscle fatigue development.
https://doi.org/10.1016/j.heliyon.2022.e12449
Drug delivery with a pH-sensitive star-like dextran-graft polyacrylamide copolymer. - In: Nanoscale advances, ISSN 2516-0230, Bd. 4 (2022), 23, S. 5077-5088
The development of precision cancer medicine relies on novel formulation strategies for targeted drug delivery to increase the therapeutic outcome. Biocompatible polymer nanoparticles, namely dextran-graft-polyacrylamide (D-g-PAA) copolymers, represent one of the innovative non-invasive approaches for drug delivery applications in cancer therapy. In this study, the star-like D-g-PAA copolymer in anionic form (D-g-PAAan) was developed for pH-triggered targeted drug delivery of the common chemotherapeutic drugs - doxorubicin (Dox) and cisplatin (Cis). The initial D-g-PAA copolymer was synthesized by the radical graft polymerization method, and then alkaline-hydrolyzed to get this polymer in anionic form for further use for drug encapsulation. The acidification of the buffer promoted the release of loaded drugs. D-g-PAAan nanoparticles increased the toxic potential of the drugs against human and mouse lung carcinoma cells (A549 and LLC), but not against normal human lung cells (HEL299). The drug-loaded D-g-PAAan-nanoparticles promoted further oxidative stress and apoptosis induction in LLC cells. D-g-PAAan-nanoparticles improved Dox accumulation and drugs’ toxicity in a 3D LLC multi-cellular spheroid model. The data obtained indicate that the strategy of chemotherapeutic drug encapsulation within the branched D-g-PAAan nanoparticle allows not only to realize pH-triggered drug release but also to potentiate its cytotoxic, prooxidant and proapoptotic effects against lung carcinoma cells.
https://doi.org/10.1039/D2NA00353H
Structure elucidation and toxicological evaluation of cyclic Polyethersulfone oligomers present in extracts of membrane filters. - In: Polymer engineering & science, ISSN 1548-2634, Bd. 62 (2022), 9, S. 2817-2825
Polyethersulfone (PES) is a widely used polymer in consumer and technical products. An important application is PES membranes used in the biopharmaceutical industry for sterilizing-grade filtration and for filtration of food and beverages. For both uses, detailed information about migrating compounds that can be extracted from the polymeric material into a liquid must be gathered. In the pharmaceutical industry, comprehensive extractables studies are required for contact materials, and the data is used in the qualification of the process equipment. PES is generated via polycondensation, which forms cyclic oligomers as a by-product of the reaction. However, no structural information is available for these cyclic oligomers so far. In this publication, we present the analytical determination of PES cyclic oligomers. Their presence in extracts of PES membrane filters is confirmed. The structure of the PES cyclic trimer is elucidated by X-ray and NMR investigation, obtained as crystals from the sublimation of the PES raw material. A strategy is shown to assess the toxicity of such cyclic oligomers and to derive a permitted daily exposure (PDE). The data will reduce the levels of unknowns in extractables and leachables screenings and supports the risk assessment of PES sterile filters.
https://doi.org/10.1002/pen.26064
Prestine C60 fullerene as a novel agent in sonodynamic treatment of cancer cells. - In: FEBS Open Bio, ISSN 2211-5463, Bd. 12 (2022), S. 74
https://doi.org/10.1002/2211-5463.13440
Four-level structural hierarchy: microfluidically supported synthesis of polymer particle architectures incorporating fluorescence-labeled components and metal nanoparticles. - In: Langmuir, ISSN 1520-5827, Bd. 38 (2022), 29, S. 8794-8804
Hierarchical assemblies of functional polymer particles are promising due to their surface as well as physicochemical properties. However, hierarchical composites are complex and challenging to form due to the many steps necessary for integrating different components into one system. Highly structured four-level composite particles were formed in a four-step process. First of all, gold (Au) nanoparticles, poly(methyl methacrylate) (PMMA) nanoparticles, and poly(tripropylene glycol diacrylate) (poly-TPGDA) microparticles were individually synthesized. By applying microfluidic techniques, polymer nano- and microparticles were formed with tunable size and surface properties. Afterwards, the negatively charged gold nanoparticles and PMMA particles functionalized with a positively charged surface were mixed to form Au/PMMA assemblies. The Au/PMMA composites were mixed and incubated with poly-TPGDA microparticles to form ternary Au/PMMA/poly-TPGDA assemblies. For the formation of composite-containing microparticles, Au/PMMA/poly-TPGDA composites were dispersed in an aqueous acrylamide-methylenebisacrylamide solution. Monomer droplets were formed in a co-flow microfluidic device and photopolymerized by UV light. In this way, hierarchically structured four-level composites consisting of four different size ranges - 0.025/0.8/30/1000 μm - were obtained. By functionalizing polymer nano- and microparticles with different fluorescent dyes, it was possible to visualize the same composite particle under two different excitation modes (λex = 395-440 and λex = 510-560 nm). The Au/PMMA/poly-TPGDA composite-embedded polyacrylamide microparticles can be potentially used as a model for the creation of composite particles for sensing, catalysis, multilabeling, and biomedical applications.
https://doi.org/10.1021/acs.langmuir.2c00686
PPDN and NTCDA radical anions formation in EMIM-DCA, BMIM-BF4 EMIM-Ac ionic liquid solutions under the steady state UV and Vis light illumination: a combined X-, K-band EPR and DFT study. - In: Journal of molecular liquids, ISSN 1873-3166, Bd. 362 (2022), 119631
The radical anion of Pyrazino[2,3-f][1,10]phenanthroline-2,3-dicarbonitrile (PPDN) in blends with imidazolium based room temperature ionic liquids (RTIL): EMIM-DCA, BMIM-BF4, EMIM-Ac has been detected by X-band continues wave (CW) electron paramagnetic resonance (EPR) under steady state Xe-lamp illumination in the temperature interval from 190 to 340 K. The radical anion of 1,4,5,8-Naphthalenetetracarboxylic dianhydride (NTCDA) was registered by X- and K-band CW EPR at room temperature under the visible light CW diode laser operated at 532 nm, and Xe-lamp as well. The experimental hyperfine coupling data of both anion radicals were confirmed by DFT calculation. The formation of PPDN•- NTCDA•- and fullerene derivative (FD) radical anions is attributed to the photoelectron transfer from an IL anion to PPDN, NTCDA and FD electron acceptors. Here, the electron transfer leads to an irreversibility of these reactions due to photo-induced decomposition of the IL anions in the presence of an effective electron acceptor and is supported in the above RTILs solutions by means of EPR. For the indirect confirmation of the EMIM-DCA, EMIM-AC, BMIM-BF4 anion degradation in solutions with PPDN and NTCDA up to the transient radical state, similar data of acetate anion [OCOCH3]- decomposition, under CW Xe-Lamp photolysis resulting in •CH3 formation and its stabilization at 77 K in EMIM-Ac suspension with some FD dissolved in DCB are introduced as well. However, the main goal of this study is dedicated to the features of rotational and translational diffusion kinetics of PPDN and NTCDA radical anions in IL solutions as well to the evaluation of their application as a spin probes in ILs study in liquid phase.
https://doi.org/10.1016/j.molliq.2022.119631
Novel whitlockite/alginate/C60 fullerene composites: synthesis, characterization and properties for medical application. - In: The Arabian journal for science and engineering, ISSN 2191-4281, Bd. 47 (2022), 6, S. 7093-7104
The hybrid composite materials in form of spheres based on whitlockite-related calcium phosphate, Alginate (20, 30 or 50 wt.%) and C60 Fullerene (C60; 2 or 5 wt.%) were fabricated. According to XRD, elemental analysis and SEM data, the whitlockite-related (hexagonal system, space group R3c) calcium phosphate containing 0.42 wt.% of sodium was obtained in the form of particles with size 50-80 nm. It has been found that the addition of Alginate (20 wt.%) to prepared calcium phosphate leads to an increase in the compressive strength of composite by two times (from 137 to 358 MPa), and value of Young's modulus on 20% (from 460 to 558 MPa), while the presence of C60 in composition did not significant influence on this characteristic. The antibacterial activity of prepared composites with different composition and amounts (2.5, 5 or 10 mM) against Lactobacillus rhamnosus, Lactobacillus salivarius, Staphylococcus aureus and Pseudomonas aeruginosa was studied. All prepared samples did not effect on Lactobacillus. The addition of 5 wt.% C60 to phosphate-Alginate (30 wt.%) composite resulted in a tenfold decrease in the survival rate of the S. aureus strain at 5 and 10 mM of samples while P. aeruginosa was less sensitive to action of this sample and inhibition of bacteria growth was occurred only at its amount 10 mM. Thus, the results of mechanical properties and impact of created nanostructured hybrid composites on normal human microbiota (Lactobacillus) as well as pathogenic strain (S. aureus and P. aeruginosa) indicate the suitability of these promising materials for further biological test for bone therapy.
https://doi.org/10.1007/s13369-021-06552-0
Analysis of biomechanical and biochemical markers of rat muscle soleus fatigue processes development during long-term use of C60 fullerene and N-acetylcysteine. - In: Nanomaterials, ISSN 2079-4991, Bd. 12 (2022), 9, 1552, S. 1-15
The development of an effective therapy aimed at restoring muscle dysfunctions in clinical and sports medicine, as well as optimizing working activity in general remains an urgent task today. Modern nanobiotechnologies are able to solve many clinical and social health problems, in particular, they offer new therapeutic approaches using biocompatible and bioavailable nanostructures with specific bioactivity. Therefore, the nanosized carbon molecule, C60 fullerene, as a powerful antioxidant, is very attractive. In this study, a comparative analysis of the dynamic of muscle soleus fatigue processes in rats was conducted using 50 Hz stimulation for 5 s with three consistent pools after intraperitoneal administration of the following antioxidants: C60 fullerene (a daily dose of 1 mg/kg one hour prior to the start of the experiment) and N-acetylcysteine (NAC; a daily dose of 150 mg/kg one hour prior to the start of the experiment) during five days. Changes in the integrated power of muscle contraction, levels of the maximum and minimum contraction force generation, time of reduction of the contraction force by 50% of its maximum value, achievement of the maximum force response, and delay of the beginning of a single contraction force response were analyzed as biomechanical markers of fatigue processes. Levels of creatinine, creatine phosphokinase, lactate, and lactate dehydrogenase, as well as pro- and antioxidant balance (thiobarbituric acid reactive substances, hydrogen peroxide, reduced glutathione, and catalase activity) in the blood of rats were analyzed as biochemical markers of fatigue processes. The obtained data indicate that applied therapeutic drugs have the most significant effects on the 2nd and especially the 3rd stimulation pools. Thus, the application of C60 fullerene has a (50-80)% stronger effect on the resumption of muscle biomechanics after the beginning of fatigue than NAC on the first day of the experiment. There is a clear trend toward a positive change in all studied biochemical parameters by about (12-15)% after therapeutic administration of NAC and by (20-25)% after using C60 fullerene throughout the experiment. These findings demonstrate the promise of using C60 fullerenes as potential therapeutic nanoagents that can reduce or adjust the pathological conditions of the muscular system that occur during fatigue processes in skeletal muscles.
https://doi.org/10.3390/nano12091552
Effect of fullerene C60 thermal and tribomechanical loading on Raman signals. - In: Diamond and related materials, ISSN 0925-9635, Bd. 126 (2022), 109036, S. 1-14
Fullerene C60 powder was loaded by 1 N normal force and exposed to sliding under different frequencies for 15 min. It is shown that the velocity of the sliding movement determines the stability of the fullerene C60 powder. At slow velocity of movement with a frequency of 1 Hz under 1 N normal force, the fullerene C60 structure remains undamaged after 15 min sliding. On the contrary, high sliding velocities of 10 Hz and 50 Hz affected fragmentation of the fullerene C60, which resulted in a reduction of the coefficient of friction (COF). During sliding with 1 Hz, the friction reached the highest level with an average COF of 0.59 ± 0.03. The faster relative motion under 1 N normal force gave a lower average COF with 0.39 ± 0.03. The initial fullerene C60 powder formed a thick compressed layer in the tribomechanical loaded zone. As proven by Raman spectroscopy, operating the tribomechanical sliding test at 50 Hz stimulated the re-attraction of fresh C60 fullerene island onto the fragmented layer from outside of the loaded powder regions. The COF was increasing again up to 0.44 ± 0.04 for 1 N normal force and 50 Hz frequency. The fragmentation and decomposition of fullerene C60 with increasing sliding velocity is attributed to thermal heating up during fast relative movement. Raman spectra of the tribomechanical loaded fullerene C60 are compared with Raman spectra from slowly heated up C60 in air and with Raman spectra of laser irradiated fullerene C60.
https://doi.org/10.1016/j.diamond.2022.109036
Post-traumatic recovery of muscle soleus in rats is improved via synergistic effect of C60 fullerene and TRPM8 agonist menthol. - In: Applied nanoscience, ISSN 2190-5517, Bd. 12 (2022), 3, S. 467-478
Functional biomechanical parameters of muscle soleus contraction in rats as well as selected blood biochemical parameters were studied during the first 3 days of post-traumatic syndrome progression caused by the destruction of muscle cells by compression. Single administration of the antioxidant C60 fullerene and the selective agonist of TRPM8 channels menthol were used as therapeutic agents. Injection of C60 fullerene at a concentration of 1 mg/kg into the damaged muscle improved its contractile function by 25-28%. The use of combined injections of C60 fullerene and menthol (at the concentration 1 mg/kg) improved this index by additional 27-39% and simultaneously stabilized the decrease in muscle strength observed throughout the experiment. A tendency towards a decrease in the indexes of the above described biochemical parameters by 10-15% were found with the therapeutic administration of C60 fullerene. With combined injections of C60 fullerene and menthol, the above described biochemical parameters decreased by an additional 17-24%. The synergism between the action of menthol and C60 fullerene on the post-traumatic recovery of skeletal muscle function opens up new perspectives for the clinical application of this combination therapy.
https://doi.org/10.1007/s13204-021-01703-z
Effect of C60 fullerene on recovery of muscle soleus in rats after atrophy induced by achillotenotomy. - In: Life, ISSN 2075-1729, Bd. 12 (2022), 3, 332, S. 1-13
Biomechanical and biochemical changes in the muscle soleus of rats during imitation of hind limbs unuse were studied in the model of the Achilles tendon rupture (Achillotenotomy). Oral administration of water-soluble C60 fullerene at a dose of 1 mg/kg was used as a therapeutic agent throughout the experiment. Changes in the force of contraction and the integrated power of the muscle, the time to reach the maximum force response, the mechanics of fatigue processes development, in particular, the transition from dentate to smooth tetanus, as well as the levels of pro- and antioxidant balance in the blood of rats on days 15, 30 and 45 after injury were described. The obtained results indicate a promising prospect for C60 fullerene use as a powerful antioxidant for reducing and correcting pathological conditions of the muscular system arising from skeletal muscle atrophy.
https://doi.org/10.3390/life12030332
A novel water-soluble C60 fullerene-based nano-platform enhances efficiency of anticancer chemotherapy. - In: Biomedical nanomaterials, (2022), S. 59-93
Im Titel ist "60" tiefgestellt
Noncovalent water-soluble nanocomplexes of C60 fullerene (C60) with chemotherapeutic drugs (Doxorubicin (Dox), Cisplatin (Cis), and herbal alkaloid Berberine (Ber)) were created. Their anticancer action toward various tumor cells was studied in vitro, addressing specifically their biological synergy, compared with the action of these drugs in the non-immobilized form. Different theoretical and experimental (SEM and AFM microscopy, UV-Vis, DLS, NMR and SANS spectroscopy, ITC calorimetry) methods were applied for getting insight into the nature of the nanocomplexes with drug molecules, as well as into the physical forces enabling stabilization of these complexes. Physicochemical mechanisms were proposed for drug interaction with C60. An enhancement of the toxic action of the created water-soluble C60-drug nanocomplexes toward cancer cells, compared to the action of free drug, was found. Specifically, the C60-Dox nanocomplexes demonstrated ˜3.5 higher cytotoxic potential in the leukemic cell lines (CCRF-CEM, Jurkat, THP1, and Molt-16) in comparison with free Dox in the nanometer range of concentrations. Besides, C60 doubled the intracellular level of the up-taken Dox, which also evidenced its function as a nanocarrier. The toxic effect of C60-Cis nanocomplex toward Lewis lung carcinoma (LLC) cells was shown to be higher with IC50 values 3.3 and 4.5 times at 48 h and 72 h, respectively, as compared to the IC50 of free drug. 12.5 [my] Cis had no effect on LLC cells' viability. The C60-Cis nanocomplex in Cis-equivalent concentration substantially decreased the viability of tumor cells, impaired their shape and adhesion, inhibited migration, and induced their accumulation in the pro-apoptotic sub-G1 phase of cell cycle. An induction of apoptosis by the C60-Cis nanocomplex was confirmed by the activation of caspase 3/7 and externalization of phosphatidylserine on the outer membrane of LLC cells after their double staining with the Annexin V-FITC/PI. The complexation with C60 promoted intracellular uptake of the Ber. An increase in C60 concentration in the C60-Ber nanocomplexes was accompanied by the elevation of their antiproliferative potential toward CCRF-CEM cells in the order: free Ber < 1:2 < 1:1 < 2:1.These findings suggest a universal potential of water-soluble pristine C60 as a unique nano-platform for the delivery of the chemotherapeutic drugs in cytotoxic effect of these drugs.
Anticoronavirus activity of water-soluble pristine C60 fullerenes: in vitro and in silico screenings. - In: Basic science and therapy development, (2021), S. 159-172
Introduction: The emergence of a new member of the Coronaviridae family, which caused the 2020 pandemic, requires detailed research on the evolution of coronaviruses, their structure and properties, and interaction with cells. Modern nanobiotechnologies can address the many clinical challenges posed by the COVID-19 pandemic. In particular, they offer new therapeutic approaches using biocompatible nanostructures with “specific” antiviral activity. Therefore, the nanosized spherical-like molecule (0.72 nm in diameter) composed of 60 carbon atoms, C60 fullerene, is of interest in terms of fighting coronaviruses due to its high biological activity. In here, we aim to evaluate the effectiveness of anticoronavirus action of water-soluble pristine C60 fullerene in the model and in vitro systems. As a model, apathogenic for human coronavirus, we used transmissible gastroenteritis virus of swine (TGEV), which we adapted to the BHK-21 cell culture (kidney cells of a newborn Syrian hamster).Methods: The shape and size of the particles present in C60 fullerene aqueous colloidal solution (C60FAS) of given concentration, as well as C60FAS stability (value of zeta potential) were studied using microscopic (STM, scanning tunneling microscopy, and AFM, atomic force microscopy) and spectroscopic (DLS, dynamic light scattering) methods. The cytopathic effect of TGEV was determined with the help of a Leica DM 750 microscope and the degree of monolayer changes in cells was assessed. The microscopy of the viral suspension was performed using a high resolution transmission electron microscope (HRTEM; JEM-1230, Japan). Finally, the search for and design of optimal possible complexes between C60 fullerene and target proteins in the structure of SARS-CoV-2 coronavirus, evaluation of their stability in the simulated cellular environment were performed using molecular dynamics and docking methods.Results: It was found that the maximum allowable cytotoxic concentration of C60 fullerene is 37.5 ± 3.0 [my]g/ml. The investigated C60FAS reduces the titer of coronavirus infectious activity by the value of 2.00 ± 0.08 TCID50/ml. It was shown that C60 fullerene interacts directly with SARS-CoV-2 proteins, such as RdRp (RNA-dependent RNA polymerase) and 3CLpro (3-chymotrypsin-like protease), which is critical for the life cycle of the coronavirus and, thus, inhibits its functional activity. In both cases, C60 fullerene fills the binding pocket and gets stuck there through stacking and steric interactions.Conclusion: Pioneer in vitro study to identify the anticoronavirus activity of water-soluble pristine C60 fullerenes indicates that they are highly promising for further preclinical studies, since a significant inhibition of the infectious activity of swine coronavirus of transmissible gastroenteritis in BHK-21 cell culture was found. According to molecular modeling results, it was shown that C60 fullerene can create the stable complexes with 3CLpro and RdRp proteins of SARS-CoV-2 coronavirus and, thus, suppress its functional activity.
Single-walled carbon nanotubes inhibit TRPC4-mediated muscarinic cation current in mouse ileal myocytes. - In: Nanomaterials, ISSN 2079-4991, Bd. 11 (2021), 12, 3410, S. 1-15
Single-walled carbon nanotubes (SWCNTs) are characterized by a combination of rather unique physical and chemical properties, which makes them interesting biocompatible nanostructured materials for various applications, including in the biomedical field. SWCNTs are not inert carriers of drug molecules, as they may interact with various biological macromolecules, including ion channels. To investigate the mechanisms of the inhibitory effects of SWCNTs on the muscarinic receptor cation current (mICAT), induced by intracellular GTPys (200 [my]M), in isolated mouse ileal myocytes, we have used the patch-clamp method in the whole-cell configuration. Here, we use molecular docking/molecular dynamics simulations and direct patch-clamp recordings of whole-cell currents to show that SWCNTs, purified and functionalized by carboxylation in water suspension containing single SWCNTs with a diameter of 0.5-1.5 nm, can inhibit mICAT, which is mainly carried by TRPC4 cation channels in ileal smooth muscle cells, and is the main regulator of cholinergic excitation-contraction coupling in the small intestinal tract. This inhibition was voltage-independent and associated with a shortening of the mean open time of the channel. These results suggest that SWCNTs cause a direct blockage of the TRPC4 channel and may represent a novel class of TRPC4 modulators.
https://doi.org/10.3390/nano11123410
Nanocomplex of Berberine with C60 fullerene is a potent suppressor of Lewis lung carcinoma cells invasion in vitro and metastatic activity in vivo. - In: Materials, ISSN 1996-1944, Bd. 14 (2021), 20, 6114, insges. 15 S.
Im Titel ist "60" tiefgestellt
Effective targeting of metastasis is considered the main problem in cancer therapy. The development of herbal alkaloid Berberine (Ber)-based anticancer drugs is limited due to Ber’ low effective concentration, poor membrane permeability, and short plasma half-life. To overcome these limitations, we used Ber noncovalently bound to C60 fullerene (C60). The complexation between C60 and Ber molecules was evidenced with computer simulation. The aim of the present study was to estimate the effect of the free Ber and C60-Ber nanocomplex in a low Ber equivalent concentration on Lewis lung carcinoma cells (LLC) invasion potential, expression of epithelial-to-mesenchymal transition (EMT) markers in vitro, and the ability of cancer cells to form distant lung metastases in vivo in a mice model of LLC. It was shown that in contrast to free Ber its nanocomplex with C60 demonstrated significantly higher efficiency to suppress invasion potential, to downregulate the level of EMT-inducing transcription factors SNAI1, ZEB1, and TWIST1, to unblock expression of epithelial marker E-cadherin, and to repress cancer stem cells-like markers. More importantly, a relatively low dose of C60-Ber nanocomplex was able to suppress lung metastasis in vivo. These findings indicated that сomplexation of natural alkaloid Ber with C60 can be used as an additional therapeutic strategy against aggressive lung cancer.
https://doi.org/10.3390/ma14206114
Magnetoresistance of carbon nanotubes filled by iron. - In: Proceedings of the 2021 IEEE 11th International Conference "Nanomaterials: Applications & Properties" (NAP-2021), (2021), S. NMM05-1-NMM05-5
Paper presents the results of experimental investigations of magnetoresistance of filled with iron multi-walled carbon nanotubes. Multi-walled carbon nanotubes have been prepared by pyrolysis of benzene in a tubular quartz furnace at a temperature of 950˚C with use ferrocene as a source of iron. The obtained by this method carbon nanotubes contain in the inner cavity the particles of the magnetic phase, namely iron, iron carbide and iron oxides in various concentrations. The electrical resistance of bulk specimens of modified carbon nanotubes have been carried out in the temperature interval from 4.2 K to 293 K and in magnetic field up to 2 T. It is shown that magnetoresistance of modified carbon nanotubes is determined by a combination of two effects: the giant magnetoresistance effect and anisotropic magnetoresistance effect, moreover, the relative contribution of each effect depends on the concentration of the magnetic phase.
https://doi.org/10.1109/NAP51885.2021.9568395
Uphill and downhill charge generation from charge transfer to charge separated states in organic solar cells. - In: Journal of materials chemistry, ISSN 2050-7534, Bd. 9 (2021), 40, S. 14463-14489
It is common knowledge that molecular energy level offsets of a type II heterojunction formed at the donor-acceptor interface are considered to be the driving force for photoinduced charge transfer in organic solar cells. Usually, these offsets - present between molecular energy levels of the donor and acceptor - are obtained via cyclic voltammetry (CV) measurements of organic semiconductors cast in a film or dissolved in solution. Simply transferring such determined energy levels from solution or film of single materials to blend films may be obviously limited and not be possible in full generality. Herein, we report various cases of material combinations in which novel non-fullerene acceptors did not yield successful charge transfer, although energy levels obtained by CV on constituting single materials indicate a type II heterojunction. Whilst the integer charge transfer (ICT) model provides one explanation for a relative rise of molecular energy levels of acceptors, further details and other cases have not been studied so far in great detail. By applying energy-resolved electrochemical impedance spectroscopy (ER-EIS) on several donor-acceptor combinations, a Fano-like resonance feature associated with a distinctive molecular energy level of the acceptor as well as various relative molecular energy level shifts of different kinds could be observed. By analyzing ER-EIS and absorption spectra, not only the exciton binding energy within single materials could be determined, but also the commonly unknown binding energy of the CT state with regard to the joint density of states (jDOS) of the effective semiconductor. The latter is defined by transitions between the highest occupied molecular orbitals (HOMO) of the donor and the lowest unoccupied molecular orbitals (LUMO) of the acceptor. Using this technique among others, we identified cases in which charge generation may occur either via uphill or by downhill processes between the charge transfer exciton and the electronic gap of the effective semiconductor. Exceptionally high CT-exciton binding energies and thus low charge generation yields were obtained for a case in which the donor and acceptor yielded a too intimate blend morphology, indicating π-π stacking as a potential cause for unfavorable molecular energy level alignment.
https://doi.org/10.1039/D1TC02351A
Antitumor efficiency of the natural alkaloid berberine complexed with C60 fullerene in Lewis lung carcinoma in vitro and in vivo. - In: Cancer nanotechnology, ISSN 1868-6966, Bd. 12 (2021), 24, insges. 18 S.
Berberine (Ber) is a herbal alkaloid with pharmacological activity in general and a high anticancer potency in particular. However, due to its low bioavailability, the difficulty in reaching a target and choosing the right dose, there is a need to improve approaches of Ber use in anticancer therapy. In this study, Ber, noncovalently bound to a carbon nanostructure C60 fullerene (C60) at various molar ratios of the components, was explored against Lewis lung carcinoma (LLC).
https://doi.org/10.1186/s12645-021-00096-6
C60 fullerene against SARS-CoV-2 coronavirus: an in silico insight. - In: Scientific reports, ISSN 2045-2322, Bd. 11 (2021), 17748, S. 1-12
Based on WHO reports the new SARS-CoV-2 coronavirus is currently widespread all over the world. So far > 162 million cases have been confirmed, including > 3 million deaths. Because of the pandemic still spreading across the globe the accomplishment of computational methods to find new potential mechanisms of virus inhibitions is necessary. According to the fact that C60 fullerene (a sphere-shaped molecule consisting of carbon) has shown inhibitory activity against various protein targets, here the analysis of the potential binding mechanism between SARS-CoV-2 proteins 3CLpro and RdRp with C60 fullerene was done; it has resulted in one and two possible binding mechanisms, respectively. In the case of 3CLpro, C60 fullerene interacts in the catalytic binding pocket. And for RdRp in the first model C60 fullerene blocks RNA synthesis pore and in the second one it prevents binding with Nsp8 co-factor (without this complex formation, RdRp can't perform its initial functions). Then the molecular dynamics simulation confirmed the stability of created complexes. The obtained results might be a basis for other computational studies of 3CLPro and RdRp potential inhibition ways as well as the potential usage of C60 fullerene in the fight against COVID-19 disease.
https://doi.org/10.1038/s41598-021-97268-6
Design, characterization and mechanical properties of new Na+, CO32--apatite/alginate/C60 fullerene hybrid biocomposites. - In: Journal of the Korean Ceramic Society, ISSN 2234-0491, Bd. 58 (2021), 4, S. 422-429
Im Titel sind "+" und "2-" hochgestellt, "3" und "60" tiefgestellt
Nanoparticles (20-50 nm) of Na+, CO32--containing calcium phosphate (Na: 1.49 wt% and C: 1.53 wt%) with apatite-type structure were prepared by precipitation method from aqueous solution. According to FTIR spectroscopy data, the partial substitution of phosphate by carbonate (B-type) realized in the apatite-type structure. Obtained Na+, CO32--hydroxyapatite (HAP) was used for the preparation of hybrid biocomposites with Alginate (Alg) with weight ratio HAP: Alg = 1:1 or 2:1 and C60 fullerene (C60; from 0.2 to 4 wt%) and their mechanical properties were determined. It was found, that sample with weight ratio HAP: Alg = 2:1 and containing 4.0 wt% of C60 has the highest Young's modulus 429 MPa comparing with other determined samples. The structure modeling of the investigated system showed that the formation of triple complexes Na+, CO32--HAP-Alg-C60 is stabilized by solvophobic and stacking interactions. The created biocomposites can be used as an effective implant material for bone restoration.
https://doi.org/10.1007/s43207-020-00107-z
A new water-soluble thermosensitive star-like copolymer as a promising carrier of the chemotherapeutic drug doxorubicin. - In: Materials, ISSN 1996-1944, Bd. 14 (2021), 13, 3517, insges. 13 S.
A new water-soluble thermosensitive star-like copolymer, dextran-graft-poly-N-iso-propilacrylamide (D-g-PNIPAM), was created and characterized by various techniques (size-exclusion chromatography, differential scanning calorimetry, Fourier-transform infrared (FTIR) spectroscopy, and dynamic light scattering (DLS) spectroscopy). The viability of cancer cell lines (human transformed cervix epithelial cells, HeLa) as a model for cancer cells was studied using MTT and Live/Dead assays after incubation with a D-g-PNIPAM copolymer as a carrier for the drug doxorubicin (Dox) as well as a D-g-PNIPAM + Dox mixture as a function of the concentration. FTIR spectroscopy clearly indicated the complex formation of Dox with the D-g-PNIPAM copolymer. The size distribution of particles in Hank’s solution was determined by the DLS technique at different temperatures. The in vitro uptake of the studied D-g-PNIPAM + Dox nanoparticles into cancer cells was demonstrated by confocal laser scanning microscopy. It was found that D-g-PNIPAM + Dox nanoparticles in contrast to Dox alone showed higher toxicity toward cancer cells. All of the aforementioned facts indicate a possibility of further preclinical studies of the water-soluble D-g-PNIPAM particles’ behavior in animal tumor models in vivo as promising carriers of anticancer agents.
https://doi.org/10.3390/ma14133517
Light-induced electron paramagnetic resonance study of charge transport in fullerene and nonfullerene PBDB-T-based solar cells. - In: The journal of physical chemistry, ISSN 1932-7455, Bd. 125 (2021), 22, S. 12224-12240
https://doi.org/10.1021/acs.jpcc.1c03427
Protective effect of water-soluble C60 fullerene nanoparticles on the ischemia-reperfusion injury of the muscle soleus in rats. - In: International journal of molecular sciences, ISSN 1422-0067, Bd. 22 (2021), 13, 6812, S. 1-13
The biomechanical parameters of muscle soleus contraction in rats and their blood biochemical indicators after the intramuscular administration of water-soluble C60 fullerene at doses of 0.5, 1, and 2 mg/kg 1 h before the onset of muscle ischemia were investigated. In particular, changes in the contraction force of the ischemic muscle soleus, the integrated power of the muscle, the time to achieve the maximum force response, the dynamics of fatigue processes, and the parameters of the transition from dentate to smooth tetanus, levels of creatinine, creatine kinase, lactate and lactate dehydrogenase, and parameters of prooxidant-antioxidant balance (thiobarbituric acid reactive substances, hydrogen peroxide, and reduced glutathione and catalase) were analyzed. The positive therapeutic changes in the studied biomechanical and biochemical markers were revealed, which indicate the possibility of using water-soluble C60 fullerenes as effective prophylactic nanoagents to reduce the severity of pathological conditions of the muscular system caused by ischemic damage to skeletal muscles.
https://doi.org/10.3390/ijms22136812
Analysis of biomechanical parameters of muscle soleus contraction and blood biochemical parameters in rat with chronic glyphosate intoxication and therapeutic use of C60 fullerene. - In: International journal of molecular sciences, ISSN 1422-0067, Bd. 22 (2021), 9, 4977, S. 1-11
https://doi.org/10.3390/ijms22094977
Salpetersäure zum Rauchen bringen. - In: Nachrichten aus der Chemie, ISSN 1868-0054, Bd. 68 (2020), 10, S. 20-22
Rauchende Salpetersäure ist im Handel nur hochrein zu kaufen und daher teuer - zu teuer für Hochschulpraktika. An der TU Ilmenau synthetisieren die Studierenden die HNO3 nun selbst als Praktikumsversuch und nutzen dafür historische Anleitungen.
https://doi.org/10.1002/nadc.20204101724
Graphene oxide influences on mechanical properties and drug release ability of hydroxyapatite based composite material. - In: Nanomaterials in biomedical application and bionsensors (NAP-2019), (2020), S. 139-149
Bioactive composite material based on hydroxyapatite (HA), sodium alginate (Alg) with different content of graphene oxide (GO) was synthesized by the wet chemistry method and characterized by TEM, XRD, FTIR, HPLC analysis. Introduced the GO nanoparticles, as well as Ca2+ ions, as cross-linker of Alg macromolecules by the beads formation, lead to enhancement of the composites mechanical properties. HA-Alg-GO10 sample with GO content of 0.004% in relation to the HA powder has a much higher Youngs modulus (1325 MPa) in comparison with GO-free HA-Alg composite (793 MPa), as well as steel sample of the same size (˜706 MPa). The addition of GO reduces the degree of the composites swelling in a phosphate buffered saline for 43% and enhances the beads shape stability. Chlorhexidine bigluconate release from GO containing samples lasts for 48 h longer according to HPLC study. The findings clear demonstrate the potential possibility of applications of the HA-Alg-GO composite material in bioengineering of bone tissue to fill bone defects of various geometries with the function of prolonged release of the drug. It is assumed that HA-Alg-GO composite material can be used in 3D modeling of areas of bone tissue that have to bear a mechanical load.
Modeling of single-walled carbon nanotube binding to nitric oxide synthase and guanylate cyclase molecular structures. - In: Neurophysiology, ISSN 1573-9007, Bd. 52 (2020), 2, S. 110-115
Previously, we have demonstrated that water dispersible single-walled carbon nanotubes (SWCNTs) may be used in low therapeutic doses in antihypertensive therapy as promising agents capable of activating constitutive nitric oxide synthase (NOS) in spontaneously hypertensive rats, thus increasing the NO production in central and peripheral elements of the cardiovascular system [1]. Here we confirm this effect by docking and molecular dynamics simulations, clearly showing that SWCNTs may interact with NOS and guanylate cyclase molecular structures.
https://doi.org/10.1007/s11062-020-09859-0
Systemic administrations of water-dispersible single-walled carbon nanotubes: activation of NOS in spontaneously hypertensive rats. - In: Neurophysiology, ISSN 1573-9007, Bd. 52 (2020), 2, S. 101-109
Priority data have been obtained on the effects of repeated systemic administrations of water-dispersible single-walled carbon nanotubes (SWCNTs) to spontaneously hypertensive rats with respect to constitutive NO-synthase (cNOS). As is known, NO is an inhibitory transmitter in the cardiovascular system. It was found that the systemic (i.p., subcutaneous, and i.m.) introductions of SWCNTs during two weeks resulted in considerable elevations of the NO2- level (a marker of NO bioavailability) in the blood of experimental hypertensive animals. Thus, SWCNTs may be used in the future for antihypertensive therapy as a novel agent capable of activating cNOS and, thus, increasing the NO production in central and peripheral elements of the cardiovascular system.
https://doi.org/10.1007/s11062-020-09858-1
C60 fullerene governs doxorubicin effect on metabolic profile of rat microglial cells in vitro. - In: Molecular pharmaceutics, ISSN 1543-8392, Bd. 17 (2020), 9, S. 3622-3632
Im Titel ist "60" tiefgestellt
Background: C60 fullerenes and their derivatives are actively investigated for the use in neuroscience. Applications of these nanoscale materials require the examination of their interaction with different neural cells, especially with microglia, because these cells, like other tissue resident phagocytes, are the earliest and most sensitive responders to nanoparticles. The aim of this study was to investigate the effect of C60 fullerene and its nanocomplex with doxorubicin (Dox) on the metabolic profile of brain-resident phagocytes - microglia - in vitro. Methods: Resting microglial cells from adult male Wistar rats were used in experiments. Potential C60 fullerene targets in microglial cells were studied by computer simulation. Microglia oxidative metabolism and phagocytic activity were examined by flow cytometry. Griess reaction and arginase activity colorimetric assay were used to explore arginine metabolism. Results: C60 fullerene when used alone did not influence microglia oxidative metabolism and phagocytic activity but shifted arginine metabolism toward the decrease of NO generation. Complexation of C60 fullerene with Dox (C60-Dox) potentiated the ability of the latter to stimulate NO generation. Conclusion: The capability of C60 fullerenes used alone to cause anti-inflammatory shift of microglia arginine metabolism makes them a promising agent for the correction of neuroinflammatory processes involved in neurodegeneration. The potentiating action of C60 fullerene on the immunomodulatory effect of Dox allows us to consider the C60 molecule as an attractive vehicle for this antitumor agent.
https://doi.org/10.1021/acs.molpharmaceut.0c00691
Evaluation of the biocompatibility of water-soluble pristine 60 fullerenes in rabbit. - In: BioNanoScience, ISSN 2191-1649, Bd. 10 (2020), 3, S. 721-730
Im Titel ist "60" tiefgestellt
C60 fullerenes have proved their therapeutic effects and efficacy by the results of countless experiments. For further usage of these nanoparticles, the systematic toxicological investigations are required. Blood compatibility should be studied for C60 fullerenes due to the potential blood contact. Currently, available data is not systematic and has not provided insights into possible side effects of C60 fullerenes on blood components. In this study, water-soluble pristine C60 fullerenes were tested in vitro to assess their biocompatibility in rabbit. The blood compatibility has been evaluated looking at the impact of C60 fullerenes on erythrocyte integrity, platelet aggregation, and some blood factors involved in coagulation. Our results revealed that C60 fullerenes cannot elicit hemolysis at studied concentrations and did not show any effect on coagulation process. C60 fullerenes in concentration-dependent manner increased ADP-dependent platelet aggregation and changed the key kinetic parameters of these processes. C60 fullerenes inhibited thrombin amidolytic activity but did not affect the activities of other studied coagulation factors. The prothrombotic property of C60 fullerenes could be the potential risk factor that leads to enhancement of vascular thrombosis. The ability of fullerene to inhibit thrombin activity is important for the pharmacological use of these carbon nanoparticles as anticoagulant agents.
https://doi.org/10.1007/s12668-020-00762-w
New nanostructured apatite-type (Na+,Zn2+,CO32-)-doped calcium phosphates : Preparation, mechanical properties and antibacterial activity. - In: Journal of molecular structure, ISSN 0022-2860, Bd. 1222 (2020), 128932
Im Titel sind "+", "2+" und "2-" hochgestellt, "3" tiefgestellt
Nanoparticles with the sizes in the range (20-30) nm of apatite-type Na+,Zn2+,CO32--doped calcium phosphates were prepared from aqueous solution of Na+-Ca2+-Zn2+-NO3--CO32--PO43- system at molar ratios Ca2+/PO43- =1.67, CО32-/РО43- = 1, Zn2+:Ca2+ = 1:100 or 2:100. The elemental analysis showed growth of Zn2+ content in composition of samples from 0.61 to 1.95 wt% at increasing of Zn2+ amount in an initial solution. According to FTIR and Raman data, B-type substitution of PO43- by CO32- realized in apatite-type calcium phosphates. The mechanical properties study for prepared phases showed the dependence of Young's modulus and compressive strength on Zn2+ amount in their composition. Growth of S. epidermidis after the contact with synthesized apatite containing Na+ (0.25 wt%), Zn2+ (0.61 wt%) and CO32- (1.18 wt%) was significantly delayed with an extension of lag time from 1 to 13-14 h. The prepared sample can be considered as a new prospective biomaterial with antibacterial potential.
https://doi.org/10.1016/j.molstruc.2020.128932
Water-soluble pristine C60 fullerene inhibits liver alterations associated with hepatocellular carcinoma in rat. - In: Pharmaceutics, ISSN 1999-4923, Bd. 12 (2020), 9, 794, S. 1-20
Richtiger Name des Verfassers: Eric Täuscher
https://doi.org/10.3390/pharmaceutics12090794
P-204 C60 fullerene inhibits hepatocellular carcinoma development and metastasis: in vitro and in vivo studies. - In: Annals of oncology, ISSN 1569-8041, Bd. 31 (2020), S. S156-147
https://doi.org/10.1016/j.annonc.2020.04.286
Identification and evaluation of cell- growth-inhibiting bDtBPP-analogue degradation products from phosphite antioxidants used in polyolefin bioprocessing materials. - In: Analytical and bioanalytical chemistry, ISSN 1618-2650, Bd. 412 (2020), 19, S. 4505-4518
https://doi.org/10.1007/s00216-020-02736-z
Impact of spin-exchange interaction on charge transfer in dual-polymer photovoltaic composites. - In: The journal of physical chemistry, ISSN 1932-7455, Bd. 124 (2020), 20, S. 10852-10869
https://doi.org/10.1021/acs.jpcc.0c02317
Single-walled carbon nanotubes loaded hydroxyapatite-alginate beads with enhanced mechanical properties and sustained drug release ability. - In: Progress in Biomaterials, ISSN 2194-0517, Bd. 9 (2020), 1/2, S. 1-14
https://doi.org/10.1007/s40204-020-00127-2
C60 fullerenes increase the intensity of rotational movements in non-anesthetized hemiparkinsonic rats. - In: Acta neurobiologiae experimentalis, ISSN 1689-0035, Bd. 80 (2020), 1, S. 32-37
Im Titel ist "60" tiefgestellt
https://doi.org/10.21307/ane-2020-003
Effects of pristine C60 fullerenes on liver and pancreas in α-naphthylisothiocyanate-induced cholangitis. - In: Digestive diseases and sciences, ISSN 1573-2568, Bd. 65 (2020), 1, S. 215-224
Im Titel ist "60" tiefgestellt
https://doi.org/10.1007/s10620-019-05730-3
LED-based portable light source for photodynamic therapy. - In: Optics in Health Care and Biomedical Optics IX, (2019), S. 11190A-1-11190A-7
https://doi.org/10.1117/12.2541774
Mode of photoexcited C60 fullerene involvement in potentiating cisplatin toxicity against drug-resistant L1210 cells. - In: BioImpacts, ISSN 2228-5660, Bd. 9 (2019), 4, S. 211-217
Im Titel ist "60" tiefgestellt
https://doi.org/10.15171/bi.2019.26
Water-soluble pristine C60 fullerene attenuates acetaminophen-induced liver injury. - In: BioImpacts, ISSN 2228-5660, Bd. 9 (2019), 4, S. 227-237
Im Titel ist "60" tiefgestellt
https://doi.org/10.15171/bi.2019.28
Synergy of chemo- and photodynamic therapies with C60 fullerene-doxorubicin nanocomplex. - In: Nanomaterials, ISSN 2079-4991, Bd. 9 (2019), 11, 1540, insges. 19 S.
Im Titel ist "60" tiefgestellt
https://doi.org/10.3390/nano9111540
C60 fullerene as an effective nanoplatform of alkaloid Berberine delivery into leukemic cells. - In: Pharmaceutics, ISSN 1999-4923, Bd. 11 (2019), 11, 586, S. 1-23
https://doi.org/10.3390/pharmaceutics11110586
In vitro and in vivo toxicity of pristine C60 fullerene aqueous colloid solution. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 27 (2019), 9, S. 715-728
Im Titel ist "60" tiefgestellt
https://doi.org/10.1080/1536383X.2019.1634055
The effect of ultraviolet irradiation on the electro-transport properties of carbon nanotubes : transport properties of ultraviolet irradiated carbon nanotubes. - In: Nanophotonics, nanooptics, nanobiotechnology, and their applications, (2019), S. 145-163
Neue Biosensoren aus mehrwandigen Kohlenstoffnanoröhren für die elektrochemische Analyse von Biomolekülen. - Ilmenau : Universitätsbibliothek, 2019. - 1 Online-Ressource (136 Blätter)
Technische Universität Ilmenau, Dissertation 2019
Stickstoff-dotierte (N-MWCNT) und Stickstoff-Phosphor-dotierte (N-P-MWCNT) mehrwandige Kohlenstoffnanoröhren wurden mittels chemischer Gasphasenabscheidungstechnik (CVD) erfolgreich hergestellt. Die synthetisierten MWCNTs sind auf Silizium/Siliziumoxid Wafer durch die Zersetzung von Acetonitril und Triphenylphosphin in Gegenwart vom Ferrocen als Katalysator gewachsen. Die Morphologie wurde mittels Rasterelektronenmikroskopie (REM) in Kombination mit Energiedispersiver Röntgenspektroskopie (EDXS), Transmissionselektronenmikroskopie (TEM), und Raman Spektroskopie untersucht. Die REM Aufnahmen zeigen, dass die N-MWCNTs einen Teppich aus vertikal ausgerichteten Kohlenstoffnanoröhrchen bilden und die Oberfläche des Films weitgehend homogen ist. TEM Aufnahmen einzelner Röhren zeigen, dass die N-MWCNTs eine sogenannte Bambus-Struktur besitzen. REM-Aufnahmen der N-P-MWCNT Filme zeigen ebenfalls eine homogene Struktur der Filme, die ähnlich der der N-MWCNT ist, mit zusätzlichen Knoten in der Röhrenstruktur. Dabei ändert sich die Morphologie der hergestellten Filme mit zunehmendem TPP Gehalt (zwischen 0.7 und 1 Gew %) in der Kohlenstoffquelle (Acetonitril). Eine Schicht aus amorphem Kohlenstoff bedeckt die Kohlenstoffnanoröhrchen teilweise, sodass keine ausgerichteten Kohlenstoffnanoröhrchen in den REM-Bildern erkannt werden können. Durch die Erhöhung des TPP Gehalts bis auf 1 Gew % im Lösungsmittel entstehen sehr dünne Filme aus N-P-MWCNTs. Die TEM-Bilder bestätigen, dass die N-P-MWCNTs noch eine Bambus-Struktur besitzen (erkennbar bis zu einem Zusatz von 0.6 Gew %. TPP). Darüber hinaus (mehr als 0.6 Gew %. TPP) konnten durch den abgeschiedenen amorphen Kohlenstoff keine TEM-Bilder mehr aufgenommen werden. Die quantitative Auswertung der Raman-Spektren zeigt, dass das Verhältnis der Intensitäten der Raman Banden D und G für N-MWCNT-Filme kleiner ist als das Verhältnis für N-P-MWCNT-Filme ist. Es wurde festgestellt, dass das Intensitätsverhältnis bei der Dotierung mit Phosphor zunimmt und folglich der Grad der Defekte abnimmt. Die elektrochemische Charakterisierung der gewachsenen Schichten mittels Zyklischer Voltammetrie und Elektrochemischer Impedanz Spektroskopie wurde gegenüber dem Redoxsystem [Fe(CN)6]3-/4- durchgeführt. Die Ergebnisse zeigen, dass die hergestellten N-MWCNTs die höchste Sensitivität, die kleinste Nachweisgrenze, und die schnellere Kinetik der Elektronübertragung im Vergleich zu den N-P-MWCNTs zeigen. Die Dotierung von Kohlenstoffnanoröhren mit Stickstoff verbessert die elektrokatalytischen Eigenschaften, während die zusätzliche Dotierung der N-MWCNTs mit Phosphor die Sensitivität und die Kinetik der elektrochemische Prozess auf diesen Filmen deutlich verringert. Die nachträgliche Modifizierung von N-MWCNTs mit Metall-Nanopartikeln (MNP) wurde ebenfalls untersucht. Dabei wurden Rhodium- (RhNP), Palladium- (PdNP), Platin- (PtNP) und Silber- (AgNP) Nanopartikel für die Modifizierung der Oberflächen verwendet. Die hergestellten Filme aus N-MWCNTs/MNP wurden ebenfalls elektrochemisch mit dem Redoxsystem [Fe(CN)6]3-/4- als Modellsystem charakterisiert. Die Ergebnisse zeigen, dass die modifizierten N-MWCNTs/MNP stärkere Signale (response) zeigen, da die Nanopartikel als Katalysator wirken. Die elektrokatalytische Aktivität der Elektroden verbessert sich in der folgenden Reihenfolge: N-MWCNTs < N-MWCNTs/RhNP < N-MWCNTs/PdNP < N-MWCNTs /PtNP < N-MWCNTs/AgNP. Die Anwendung von N-MWCNTs/MNP (M: Rh, Pd, Ir, Pt, und Au) Filmen als Arbeitselektroden für die gleichzeitige quantitative Analyse von einigen medizinisch relevanten Biomolekülen, wie zum Bespiel Ascorbinsäure, Dopamin, und Harnsäure in Phosphat-Puffer-Lösung PBS (pH 7.0) wurde ebenfalls erfolgreich demonstriert. Die Ergebnisse zeigen, dass die Nachweisgrenze von N-MWCNTs/MNP in der folgenden Rheinfolge abnimmt: N-MWCNTs > N-MWCNTs/RhNP > N-MWCNTs/PdNP > N-MWCNTs/IrNP > N-MWCNTs /PtNP > N-MWCNTs/AuNP. Die AuNP zeigen den größten Effekt auf die Empfindlichkeit und die elektrokatalytische Aktivität bei der gleichzeitigen Bestimmung der untersuchten Moleküle. Die hergestellten nanostrukturierten Schichten aus N-MWCNTs und AuNP konnten auch für die Analyse von Acetaminophen (AC) und N-Acetyl-Cystein (NAC) erfolgreich eingesetzt werden. Die Stabilität der synthetisierten Kohlenstoffnanofilme über längere Zeiträume und die Reproduzierbarkeit der Synthese der Filme wurden untersucht und zeigen, dass die hergestellten Elektrodenfilme eine sehr gute Stabilität und Reproduzierbarkeit in den elektrochemischen Messungen aufweisen.
https://nbn-resolving.org/urn:nbn:de:gbv:ilm1-2019000279
C60 fullerene loaded hydroxyapatite-chitosan beads as a promising system for prolonged drug release. - In: Carbohydrate polymers, ISSN 1879-1344, Bd. 223 (2019), S. 115067
Im Titel ist "60" tiefgestellt
https://doi.org/10.1016/j.carbpol.2019.115067
Water-soluble C60 fullerenes reduce manifestations of acute cholangitis in rats. - In: Applied nanoscience, ISSN 2190-5517, Bd. 9 (2019), 5, S. 601-608
https://doi.org/10.1007/s13204-018-0700-5
Untersuchung des Elektrolyseprinzips zur Bestimmung von geringen Feuchtegehalten und der Einsatz von ionischen Flüssigkeiten als neuartige Sensorbeschichtung. - Ilmenau : Universitätsbibliothek, 2019. - 1 Online-Ressource (1 Band, verschiedene Seitenzählungen)
Technische Universität Ilmenau, Dissertation 2019
Feuchte, sei es Material- oder Gasfeuchte, ist eine wichtige Messgröße bei der Qualitätsbeurteilung von Kunststoffen, landwirtschaftlichen Erzeugnissen, Energieträgern, Arzneimitteln, industriell und medizinisch verwendeten Gasen. Deswegen gibt es ein Interesse Feuchtemesserfahren hinsichtlich Präzision, Wiederholbarkeit, Rückführbarkeit und Stabilität kontinuierlich zu verbessern. Ein bewährtes Messprinzip für diese Aufgabe wurde bereits 1959 von Keidel entwickelt und basiert auf der Absorption und Elektrolyse von Wasserdampf. Der einfache Aufbau dieses Prinzips besteht aus einem Sensorelement, einer Gleichspannungsquelle, einem Digitalmultimeter und einen geregelten Gasstrom über den Sensor. Nach dem Faradayschen Gesetz der Elektrolyse korreliert bei dem Messprinzip die Ladungsmenge mit der elektrolysierten Wassermasse. Jedoch bedarf es in der heutigen Zeit einer Validierung der Sensoren, weil durch gezielte Miniaturisierung weniger aktive Fläche vorhanden ist und somit das Faraday'sche Gesetz nicht vollständig anwendbar ist. In dieser Arbeit wurden coulometrische Sensoren mit einer planaren Elektrodenstruktur hinsichtlich der Einflüsse von unterschiedlichen Gasen, der Gastemperatur und dem -druck untersucht. Zusätzlich wurde eine neuartige Sensorbeschichtung basierend auf einer ionischen Flüssigkeit getestet. Des Weiteren wurde ein Messgerät für die abgestufte Bestimmung der Materialfeuchte und Wasseraktivität entwickelt und dessen messtechnischer Einsatz untersucht.
https://nbn-resolving.org/urn:nbn:de:gbv:ilm1-2019000209
Antitumor effects and hematotoxicity of C60-Cis-Pt nanocomplex in mice with Lewis lung carcinoma. - In: Experimental oncology, Bd. 42 (2019), 2, S. 106-111
Im Titel ist "60" tiefgestellt
https://doi.org/10.32471/exp-oncology.2312-8852.vol-41-no-2.13030
Toxicity of C60 fullerene-cisplatin nanocomplex against Lewis lung carcinoma cells. - In: Archives of toxicology, ISSN 1432-0738, Bd. 93 (2019), 5, S. 1213-1226
https://doi.org/10.1007/s00204-019-02441-6
C60 fullerenes selectively inhibit BKCa but not Kv channels in pulmonary artery smooth muscle cells. - In: Nanomedicine, ISSN 1549-9642, Bd. 19 (2019), S. 1-11
Im Titel sind "60", "Ca" und "v" tiefgestellt
https://doi.org/10.1016/j.nano.2019.03.018
Reconciling the controversial data on the effects of C60 fullerene at the organismal and molecular levels using as a model Drosophila melanogaster. - In: Toxicology letters, ISSN 1879-3169, Bd. 310 (2019), S. 92-98
Im Titel ist "60" tiefgestellt
https://doi.org/10.1016/j.toxlet.2019.03.006
Pristine C60 fullerenes suppress liver fibrosis and early carcinogenesis on rat hepatocellular carcinoma model. - In: Hepatology international, ISSN 1936-0541, Bd. 13 (2019), Suppl. 1, Abstract #663, Seite S262
https://doi.org/10.1007/s12072-019-09936-5
Die bunte Welt der Porphyrine: von der Natur zur Hochtechnologie. - In: Chemie in unserer Zeit, ISSN 1521-3781, Bd. 53 (2019), 1, S. 12-21
https://doi.org/10.1002/ciuz.201800813
In vitro study of the anticancer activity of various doxorubicin-containing dispersions. - In: BioImpacts, ISSN 2228-5660, Bd. 9 (2019), 1, S. 57-63
https://doi.org/10.15171/bi.2019.07
Complexation with C60 fullerene increases doxorubicin efficiency against leukemic cells in vitro. - In: Nanoscale research letters, ISSN 1556-276X, (2019), 14:61, page 1-10
Im Titel ist "60" tiefgestellt
https://doi.org/10.1186/s11671-019-2894-1
A novel nanoconjugate of Landomycin A with C60 fullerene for cancer targeted therapy: in vitro studies. - In: Cellular and molecular bioengineering, ISSN 1865-5033, Bd. 12 (2019), 1, S. 41-51
https://doi.org/10.1007/s12195-018-0548-5
Effect of C60 fullerene nanoparticles on the diet-induced obesity in rats. - In: International journal of obesity, ISSN 1476-5497, Bd. 42 (2018), 12, S. 1987-1998
Im Titel ist "60" tiefgestellt
https://doi.org/10.1038/s41366-018-0016-2
C60 fullerene prevents restraint stress-induced oxidative disorders in rat tissues: possible involvement of the Nrf2/ARE-antioxidant pathway. - In: Oxidative medicine and cellular longevity, ISSN 1942-0994, (2018), Article ID 2518676, insges. 17 S.
Im Titel ist "60" tiefgestellt
https://doi.org/10.1155/2018/2518676
Controlling intermolecular interactions at interfaces: case of supramolecular tuning of fullerene's electronic structure. - In: Advanced energy materials, ISSN 1614-6840, Bd. 8 (2018), 32, 1801737, insges. 13 S.
https://doi.org/10.1002/aenm.201801737
W-band ENDOR of light-induced PPerAcr anion radicals in double-crystalline donor-bridge-acceptor P3HT-b-PPerAcr block copolymer in frozen solution: experimental and DFT study. - In: The journal of physical chemistry, ISSN 1932-7455, Bd. 122 (2018), 40, S. 22829-22837
https://doi.org/10.1021/acs.jpcc.8b05086
C60 fullerene and its nanocomplexes with anticancer drugs modulate circulating phagocyte functions and dramatically increase ROS generation in transformed monocytes. - In: Cancer nanotechnology, ISSN 1868-6966, Bd. 9 (2018), 8$22
Im Titel ist "60" tiefgestellt
https://doi.org/10.1186/s12645-017-0034-0
Boron-doped multi-walled carbon nanotubes as sensing material for analysis of dopamine and epinephrine in presence of uric acid. - In: Chemical physics letters, Bd. 710 (2018), S. 157-167
https://doi.org/10.1016/j.cplett.2018.09.007
Effect of 60 fullerenes on the intensity of colon damage and hematological signs of ulcerative colitis in rats. - In: Materials science & engineering, ISSN 1873-0191, Bd. 93 (2018), S. 505-517
Im Titel ist "60" tiefgestellt
https://doi.org/10.1016/j.msec.2018.08.033
Composite material based on hydroxyapatite and multi-walled carbon nanotubes filled by iron: preparation, properties and drug release ability. - In: Materials science & engineering, ISSN 1873-0191, Bd. 93 (2018), S. 606-614
https://doi.org/10.1016/j.msec.2018.08.019
Pristine C60 fullerenes affect the hepatic and extrahepatic manifestations of experimental cholangitis. - In: Hepatology international, ISSN 1936-0541, Bd. 12 (2018), Suppl. 2, YIA-B-02, Seite S190
https://doi.org/10.1007/s12072-018-9852-3
Ionische Flüssigkeiten als neuartige Sensorbeschichtung für coulometrische Spurenfeuchtesensoren. - In: Sensoren und Messsysteme, (2018), S. 520-523
HPLC-ESI-MS method for C60 fullerene mitochondrial content quantification. - In: Data in Brief, ISSN 2352-3409, Bd. 19 (2018), S. 2047-2052
https://doi.org/10.1016/j.dib.2018.06.089
C60 fullerene accumulation in human leukemic cells and perspectives of LED-mediated photodynamic therapy. - In: Free radical biology and medicine, ISSN 1873-4596, Bd. 124 (2018), S. 319-327
Im Titel ist "60" tiefgestellt
https://doi.org/10.1016/j.freeradbiomed.2018.06.022
Single-walled carbon nanotubes affect the expression of genes associated with immune response in normal human astrocytes. - In: Toxicology in vitro, ISSN 1879-3177, Bd. 52 (2018), 10, S. 122-130
https://doi.org/10.1016/j.tiv.2018.06.011
C60 fullerenes diminish muscle fatigue in rats comparable to N-acetylcysteine or β-Alanine. - In: Frontiers in physiology, ISSN 1664-042X, Bd. 9 (2018), Article 517, insges. 12 S.
https://doi.org/10.3389/fphys.2018.00517
Halogens - light emission and fire :
Halogene - Licht und Feuer. - In: Chemie konkret, ISSN 1521-3730, Bd. 25 (2018), 2, S. 63-68
https://doi.org/10.1002/ckon.201800013
C60 fullerene effects on diphenyl-N-(trichloroacetyl)-amidophosphate interaction with DNA in silico and its cytotoxic activity against human leukemic cell line in vitro. - In: Nanoscale research letters, ISSN 1556-276X, Bd. 13 (2018), Article 81, insges. 9 S.
Im Titel ist "60" tiefgestellt
https://doi.org/10.1186/s11671-018-2490-9
Self-organization of pristine C60 fullerene and its complexes with chemotherapy drugs in aqueous solution as promising anticancer agents. - In: Modern Problems of Molecular Physics, (2018), S. 3-22
Im Titel ist "60" tiefgestellt
https://doi.org/10.1007/978-3-319-61109-9_1
Synthesis and electrochemical applications of boron- and phosphorus-doped carbon nanotubes. - Ilmenau : Universitätsbibliothek, 2018. - 1 Online-Ressource (vii, 117 Blätter)
Technische Universität Ilmenau, Dissertation 2018
Bor-dotierte (B-MWCNT) und Phosphor-dotierte (P-MWCNT) Kohlenstoffnanoröhren wurde mittels chemischer Gasphasenabscheidungstechnik erfolgreich hergestellt. Durch die Verwendung unterschiedlicher Kohlenstoffquellen und Dotierungsmitteln zeigen die Phosphor- und Bor-dotierten MWCNTs unterschiedliche Strukturen. Dabei treten neben vertikal ausgerichteten, hohlen vertikal ausgerichteten, Y-förmige auch horizontal orientierte Nanoröhren auf. Die dotierten MWCNTs wurden unter Verwendung von Raman-Spektroskopie, Rasterelektronenmikroskopie, Transmissionselektronenmikroskopie (in Kombination mit Elektronenenergieverlustspektroskopie) und Röntgen-Photoelektron Spektroskopie umfassend charakterisiert. Neben der physikalischen Charakterisierung wurden sowohl die B-MWCNTs als auch die P-MWCNTs elektrochemisch untersucht, indem als Modellredoxsystem [Fe(CN)6]^3-/4- in KCl Lösung angewendet wurde. Die hergestellten Elektroden wurden dann für das biologisch relevante Dopamin/Dopaminchinone Redox-System (in Phosphatpufferlösung, pH=7) angewendet. Hierfür wurden sowohl die Zyklische Voltametrie als auch die Elektrochemische Impedanz Spektroskopie verwendet. Im Folgenden wurden die Effekte der Oberflächen-funktionalisierung mit Goldnanopartikeln (AuNP), Oxidation mit Piranha Lösung und Säurebehandlung mit HCl auf die elektrochemischen Eigenschaften von B-MWCNTs und P-MWCNTs studiert. Auch hier wurde sowohl das Modellesystem [Fe(CN)6]^3-/4- als auch der Anwendungsfall mit dem Dopamin/Dopaminchinone Redoxsystem betrachtet. Die Ergebnisse zeigen, dass das elektrochemische Verhalten von B-MWCNTs und P-MWCNTs stark durch die Nanoröhrenstruktur und Konfiguration (einzelne Nanoröhren oder Cluster- Nanoröhren), sowie durch die Anwesenheit von amorphen Kohlenstoffstrukturen auf der Nanoröhrenoberfläche beeinflusst wird. Y-förmige B-MWCNTs zeigen einen schnelleren Elektronentransfer im Vergleich zu vertikal ausgerichteten dotierten B-MWCNTs und P-MWCNTs welche teilweise mit amorphen Kohlenstoffstrukturen bedeckt sind. Die Kinetik für den Elektronentransfer auf Y-förmige B-MWCNTs und P-MWCNTs mit Kohlenstoff auf der Oberfläche lässt sich durch den Einsatz von AuNP weiter verstärken.
http://nbn-resolving.de/urn:nbn:de:gbv:ilm1-2018000035
Does C60 fullerene act as a transporter of small aromatic molecules?. - In: Colloids and surfaces, ISSN 1873-4367, Bd. 164 (2018), S. 134-143
Im Titel ist "60" tiefgestellt
https://doi.org/10.1016/j.colsurfb.2018.01.026
C60 fullerenes disrupt cellular signalling leading to TRPC4 and TRPC6 channels opening by the activation of muscarinic receptors and G-proteins in small intestinal smooth muscles. - In: Cellular signalling, ISSN 1873-3913, Bd. 43 (2018), S. 40-46
Im Titel ist "60" tiefgestellt
https://doi.org/10.1016/j.cellsig.2017.12.003
Magnetoresistance of graphite intercalated with cobalt. - In: Journal of materials science, ISSN 1573-4803, Bd. 53 (2018), 1, S. 716-726
https://doi.org/10.1007/s10853-017-1511-x
Influence of carbon source and synthesis temperature on structural and morphological properties of carbon nanofibers synthesized on tubular porous ZrO2 layers. - In: Diamond and related materials, ISSN 0925-9635, Bd. 78 (2017), S. 88-96
Im Titel ist "2" tiefgestellt
https://doi.org/10.1016/j.diamond.2017.08.006
An electrochemical quartz crystal microbalance study on electrodeposition of aluminum and aluminum-manganese alloys. - In: Journal of the Electrochemical Society, ISSN 1945-7111, Bd. 164 (2017), 8, Seite H5263-H5270
https://doi.org/10.1149/2.0381708jes
A nanocomplex of C60 fullerene with cisplatin: design, characterization and toxicity. - In: Beilstein journal of nanotechnology, ISSN 2190-4286, Bd. 8 (2017), S. 1494-1501
Im Titel ist "60" tiefgestellt
https://doi.org/10.3762/bjnano.8.149
Synthesis and electrochemical characterization of nitrogen-doped and nitrogen-phosphorus-doped multi-walled carbon nanotubes. - In: Ionics, ISSN 1862-0760, Bd. 23 (2017), 8, S. 2025-2035
https://doi.org/10.1007/s11581-017-2049-2
Tribolumineszenz : eine fast vergessene Leuchterscheinung. - In: Chemie in unserer Zeit, ISSN 1521-3781, Bd. 51 (2017), 2, S. 130-139
https://doi.org/10.1002/ciuz.201600731
Magnetic anisotropy of the graphite nanoplatelet-epoxy and MWCNT-epoxy composites with aligned barium ferrite filler. - In: Journal of materials science, ISSN 1573-4803, Bd. 52 (2017), 9, S. 5345-5358
http://dx.doi.org/10.1007/s10853-017-0776-4
Cytotoxic effects of dimorfolido-N-trichloroacetylphosphorylamide and dimorfolido-N-benzoylphosphorylamide in combination with C60 fullerene on leukemic cells and docking study of their interaction with DNA. - In: Nanoscale research letters, ISSN 1556-276X, Bd. 12 (2017), Article 124, insges. 9 S.
Im Titel ist "60" tiefgestellt
http://dx.doi.org/10.1186/s11671-017-1893-3
C60 fullerene enhances cisplatin anticancer activity and overcomes tumor cell drug resistance. - In: Nano research, ISSN 1998-0000, Bd. 10 (2017), 2, S. 652-671
Im Titel ist "60" tiefgestellt
http://dx.doi.org/10.1007/s12274-016-1324-2
Comparative analysis of the antineoplastic activity of C60 fullerene with 5-fluorouracil and pyrrole derivative in vivo. - In: Nanoscale research letters, ISSN 1556-276X, Bd. 12 (2017), Article 8, insges. 6 S.
Im Titel ist "60" tiefgestellt
http://dx.doi.org/10.1186/s11671-016-1775-0
Fullerene C60 penetration into leukemic cells and its photoinduced cytotoxic effects. - In: Nanoscale research letters, ISSN 1556-276X, Bd. 12 (2017), Article 40, insges. 9 S.
Im Titel ist "60" tiefgestellt
http://dx.doi.org/10.1186/s11671-016-1819-5
Quantitative crystallographic analysis of individual carbon nanofibers using high resolution transmission electron microscopy and electron diffraction. - In: Carbon, ISSN 1873-3891, Bd. 116 (2017), S. 347-355
http://dx.doi.org/10.1016/j.carbon.2017.01.107
C60 fullerene as promising therapeutic agent for correcting and preventing skeletal muscle fatigue. - In: Journal of nanobiotechnology, ISSN 1477-3155, Bd. 15 (2017), Article 8, insges. 12 S.
Im Titel ist "60" tiefgestellt
http://dx.doi.org/10.1186/s12951-016-0246-1
C60 fullerene as promising therapeutic agent for the prevention and correction of skeletal muscle functioning at ischemic injury. - In: Nanoscale research letters, ISSN 1556-276X, Bd. 12 (2017), Article 115, insges. 9 S.
Im Titel ist "60" tiefgestellt
http://dx.doi.org/10.1186/s11671-017-1876-4
Mikrofluidische Herstellung und Deutung der katalytischen Aktivität von Metallnanopartikeln für die Biohybridsynthese. - In: Technische Systeme für die Lebenswissenschaften, (2016), S. 631-632
Combined W-band light-induced ESR/ENDOR/TRIPLE and DFT study of PPVtype/PC61BM ion radicals. - In: The journal of physical chemistry. Energy, materials, and catalysis / American Chemical Society. - Washington, DC : Soc., 2007- , ISSN: 1932-7455 , ZDB-ID: 2256522-X, ISSN 1932-7455, Bd. 120 (2016), 51, S. 28905-28911
http://dx.doi.org/10.1021/acs.jpcc.6b08034
Schichten aus Kohlenstoff-Nanomaterialien auf asymmetrisch porösen, keramischen Trägern und deren Erprobung für Anwendungen in Membrantechnik und Katalyse. - Ilmenau : Universitätsbibliothek, 2016. - 1 Online-Ressource (xx, 192 Seiten)
Technische Universität Ilmenau, Dissertation 2016
Die vorliegende Arbeit behandelt die maßgeschneiderte Synthese von Kohlenstoff-Nanofilamenten auf asymmetrisch porösen, keramischen Trägern für potentielle Anwendungen in der Membrantechnik und Katalyse und deren Charakterisierung. Die für die Synthese erforderlichen Katalysatorpartikel (Palladium und Eisen) werden anhand nasschemischer Präparationsmethoden überwiegend auf der Innenseite der rohrförmigen Träger aufgebracht. Dem sich anschließenden Trocknungsschritt folgt die Synthese von Kohlenstoff-Nanofilamenten anhand des Verfahrens der chemischen Gasphasenabscheidung (CVD-Verfahren). Eine gezielte Variation von Prozessgrößen (bspw. Synthesetemperatur, Kohlenstoffquelle, Katalysatormaterial, Haltezeit und Katalysatorkonzentration) führt zu einer Strukturvarianz der Röhren mit unterschiedlichen Eigenschaften. Die erhaltenen Kohlenstoffprodukte werden anhand elektronenmikroskopischer, spektroskopischer und thermischer Analysemethoden charakterisiert. Ergänzend wurde in dem apparativen Aufbau der CVD-Anlage eine inline-Analytik implementiert, die die Charakterisierung des Katalysatorverhaltens während der Wachstumsphase erlaubt. Die auf dem Träger abgeschiedenen Schichten aus Kohlenstoff-Nanomaterialien wurden einerseits in Hinblick auf ihre gastrennenden Eigenschaften und andererseits hinsichtlich ihrer katalytischen Eigenschaften anhand einer Modellreaktion untersucht. Insbesondere mit Stickstoff dotierte Röhren zeigen adsorptionsselektive Eigenschaften für Kohlenwasserstoffe (Propan, Propen). Die katalytische Reaktion der oxidativen Dehydrierung von Ethylbenzol zu Styrol (ODEB) konnte erfolgreich anhand der sich auf dem Träger befindlichen Kohlenstoff-Nanofilamenten nachgewiesen werden. Sowohl die elementaren Untersuchungen zu gastrennenden Eigenschaften der Kohlenstoff-Nanofilamente als auch deren Erprobung für katalytische Reaktionen bilden die Grundlage für weitere Entwicklungsmöglichkeiten in Bezug auf katalytisch arbeitende Membranreaktoren.
http://nbn-resolving.de/urn:nbn:de:gbv:ilm1-2016000634
Synthese und elektrochemische Anwendungen von modifizierten Kohlenstoffnanoröhren. - Ilmenau. - iv, 471 Seiten
Technische Universität Ilmenau, Habilitationsschrift 2016
Hepatoprotective effect of orally applied water-soluble pristine C60 fullerene against CCl4-induced acute liver injury in rats. - In: RSC Advances, ISSN 2046-2069, Bd. 6 (2016), 102, S. 100046-100055
Im Titel ist "60" und "4" tiefgestellt
http://dx.doi.org/10.1039/C6RA20291H
Electrochemical response of nitrogen-doped multi-walled carbon nanotubes decorated with gold and iridium nanoparticles toward ferrocyanide/ferricyanide redox system. - In: Ionics, ISSN 1862-0760, Bd. 22 (2016), 10, S. 1957-1965
http://dx.doi.org/10.1007/s11581-016-1702-5
Study of the complexation between Landomycin A and C60 fullerene in aqueous solution. - In: RSC Advances, ISSN 2046-2069, Bd. 6 (2016), 84, S. 81231-81236
Im Titel ist "60" tiefgestellt
http://dx.doi.org/10.1039/C6RA18807A
Controlling electronic transitions in fullerene van der Waals aggregates via supramolecular assembly. - In: ACS applied materials & interfaces, ISSN 1944-8252, Bd. 8 (2016), 33, S. 21512-21521
http://dx.doi.org/10.1021/acsami.6b06800
Light-induced X,W-band Electron Spin Resonance study of double-crystalline donor-acceptor P3HT-b-PPerAcr block copolymers in solid thin films. - In: Synthetic metals, Bd. 215 (2016), S. 251-259
http://dx.doi.org/10.1016/j.synthmet.2016.02.002
Keine Angst vor Peroxiden : das Experiment. - In: Chemie in unserer Zeit, ISSN 1521-3781, Bd. 50 (2016), 2, S. 130-139
http://dx.doi.org/10.1002/ciuz.201500680
Micro-flow assisted synthesis of fluorescent polymer nanoparticles with tuned size and surface properties. - In: Nanotechnology reviews, ISSN 2191-9097, Bd. 5 (2016), 2, S. 259-272
http://dx.doi.org/10.1515/ntrev-2015-0061
Electrochemical analysis of ascorbic acid, dopamine, and uric acid on nobel metal modified nitrogen-doped carbon nanotubes. - In: Sensors and actuators, ISSN 0925-4005, Bd. 231 (2016), S. 218-229
http://dx.doi.org/10.1016/j.snb.2016.03.032
Long-term stabilization of organic solar cells using hydroperoxide decomposers as additives. - In: Applied physics, ISSN 1432-0630, Bd. 122 (2016), 3, Article 255, insges. 6 S.
http://dx.doi.org/10.1007/s00339-016-9758-7
Study of biocompatibility effect of nanocarbon particles on various cell types in vitro. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 47 (2016), 2/3, S. 216-221
http://dx.doi.org/10.1002/mawe.201600486
Der magnetoresistive Effekt von funktionalisierten Kohlenstoffnanoröhren :
Magnetoresistance of functionalized carbon nanotubes. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 47 (2016), 2/3, S. 254-262
http://dx.doi.org/10.1002/mawe.201600482
Optimization of multilayer electromagnetic shields: a genetic algorithm approach. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 47 (2016), 2/3, S. 263-271
http://dx.doi.org/10.1002/mawe.201600483
Bildung von Chlorwasserstoff-Oberflächenclustern an C60/C70 Fulleriten und deren Kompositen mit Nanosilikaten :
Clustering of hydrochloric acid on the surface of C60/C70 fullerite and its composites with nanosilica. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 47 (2016), 2/3, S. 172-179
Im Titel sind "60" und "70" tiefgestellt
http://dx.doi.org/10.1002/mawe.201600459
"Gast-Wirt"-Interkalat von doppelwandigen Kohlenstoff-Nanoröhren mit Tricarbonyl (cyclopentadienyl)-Mangan :
"Guest-host" intercalate of double-walled carbon nanotube with tricarbonyl (cyclopentadienyl)manganese. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 47 (2016), 2/3, S. 203-207
http://dx.doi.org/10.1002/mawe.201600477
Single-walled carbon nanotubes modulate cardiovascular control in rats. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 47 (2016), 2/3, S. 208-215
http://dx.doi.org/10.1002/mawe.201600484
Einwandige Kohlenstoff-Nanoröhren beeinflussen die Expression des CCND2-Gens in humanen U87 Glioma-Zellen :
Single-walled carbon nanotubes affect the expression of the CCND2 gene in human U87 glioma cells. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 47 (2016), 2/3, S. 180-188
http://dx.doi.org/10.1002/mawe.201600462
Wechselwirkung von C60-Fulleren mit Cisplatin im Komplex mit Modell-Bilipidmembranen und ihre Aufnahme durch HeLa-Zellen :
Interaction of C60 fullerene complexed to cisplatin with model bilipid membranes and its uptake by HeLa cells. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 47 (2016), 2/3, S. 105-111
Im Titel ist "60" tiefgestellt
http://dx.doi.org/10.1002/mawe.201600474
Biophysikalische Charakterisierung der Komplexierung von C60-Fulleren mit Doxorubicin in einem prokaryotischen Modell :
Biophysical characterization of the complexation of C60 fullerene with doxorubicin in a prokaryotic model. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 47 (2016), 2/3, S. 92-97
Im Titel ist "60" tiefgestellt
http://dx.doi.org/10.1002/mawe.201600463
Long-term stabilization of organic solar cells using UV absorbers. - In: Journal of physics, ISSN 1361-6463, Bd. 49 (2016), 12, 125604, S. 1-7
http://dx.doi.org/10.1088/0022-3727/49/12/125604
Combined action of C60 fullerene with dimethyl-N-(benzoyl)amidophosphate or dimethyl-N-(phenylsulfonyl)amidophosphate on leukemia L1210 cells in silico and in vitro. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 47 (2016), 2/3, S. 98-104
Im Titel ist "60" tiefgestellt
http://dx.doi.org/10.1002/mawe.201600471
Multi-walled carbon nanotubes doped with boron as an electrode material for electrochemical studies on dopamine, uric acid, and ascorbic acid. - In: Microchimica acta, ISSN 1436-5073, Bd. 183 (2016), 1, S. 35-47
https://doi.org/10.1007/s00604-015-1585-6
Interaction of C 60 fullerene complexed to doxorubicin with model bilipid membranes and its uptake by HeLa cells. - In: Materials science & engineering, ISSN 1873-0191, Bd. 59 (2016), S. 398-403
http://dx.doi.org/10.1016/j.msec.2015.10.049
Fuleren C60 zapobigaje genotoksyčnij dii doksorubicynu na limfocyty ljudyny in vitro :
C60 fullerene prevents genotoxic effects of doxorubicin in human lymphocytes in vitro. - In: The Ukrainian biochemical journal, ISSN 2413-5003, Bd. 87 (2015), 1, S. 91-98
Im Titel ist "60" tiefgestellt
https://doi.org/10.15407/ubj87.01.091
Tumor-inhibitory effect of C60 fullerene complex with doxorubicin. - In: Nanomedicine and Nanobiology, ISSN 2167-9304, Bd. 2 (2015), 1, S. 49-53
Im Titel ist "60" tiefgestellt
https://doi.org/10.1166/nmb.2015.1015
Synthesis and complexation of well-defined labeled poly(N,N-dimethylaminoethyl methacrylate)s (PDMAEMA). - In: Polymers, ISSN 2073-4360, Bd. 7 (2015), 12, S. 2478-2493
https://doi.org/10.3390/polym7121526
Complex of C60 fullerene with doxorubicin as a promising agent in antitumor therapy. - In: Nanoscale research letters, ISSN 1556-276X, Bd. 10.2015, 1, Article 499, insges. 7 S.
Im Titel ist "60" tiefgestellt
http://dx.doi.org/10.1186/s11671-015-1206-7
Properties and electrochemical characteristics of boron-doped multi-walled carbon nanotubes. - In: Chemical physics letters, Bd. 639 (2015), S. 217-224
https://doi.org/10.1016/j.cplett.2015.09.037
Application of multi-walled carbon nanotubes modified with boron oxide nanoparticles in electrochemistry. - In: Ionics, ISSN 1862-0760, Bd. 21 (2015), 11, S. 3087-3095
https://doi.org/10.1007/s11581-015-1496-x
Structural self-organization of C 60 and cisplatin in physiological solution. - In: Physical chemistry, chemical physics, ISSN 1463-9084, Bd. 17 (2015), 39, S. 26084-26092
https://doi.org/10.1039/C5CP02688A
C 60 fullerene affects elastic properties and osmoregulation reactions of human lymphocytes. - In: European biophysics journal, ISSN 1432-1017, Bd. 44 (2015), 6, S. 493-498
https://doi.org/10.1007/s00249-015-1050-9
Magnetoresistance and electrical resistivity of N-doped multi-walled carbon nanotubes at low temperatures. - In: Physica status solidi, ISSN 1521-3951, Bd. 252 (2015), 6, S. 1402-1409
http://dx.doi.org/10.1002/pssb.201451657
Carbon nanotubes and carbon nanofibers fabricated on tubular porous Al 2 O 3 substrates. - In: Carbon, ISSN 1873-3891, Bd. 90 (2015), S. 25-33
http://dx.doi.org/10.1016/j.carbon.2015.03.048
Electrochemical studies on novel films consisting of phosphorus-doped multi-walled carbon nanotubes. - In: Ionics, ISSN 1862-0760, Bd. 21 (2015), 4, S. 1081-1088
http://dx.doi.org/10.1007/s11581-014-1277-y
Synthesis, characterization, and electrochemical application of phosphorus-doped multi-walled carbon nanotubes. - In: Journal of solid state electrochemistry, ISSN 1433-0768, Bd. 19 (2015), 3, S. 891-905
http://dx.doi.org/10.1007/s10008-014-2696-4
Structural organization of C 60 fullerene, doxorubicin, and their complex in physiological solution as promising antitumor agents. - In: Journal of nanoparticle research, ISSN 1572-896X, Bd. 17 (2015), 1, 45, insges. 9 S.
https://doi.org/10.1007/s11051-015-2867-y
Application of C60 fullerene-doxorubicin complex for tumor cell treatment in vitro and in vivo. - In: Journal of biomedical nanotechnology, ISSN 1550-7041, Bd. 11 (2015), 7, S. 1139-1152
Im Titel ist "60" tiefgestellt
http://dx.doi.org/10.1166/jbn.2015.2058
Structural features of highly stable reproducible C 60 fullerene aqueous colloid solution probed by various techniques. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 23 (2015), 6, S. 530-534
http://dx.doi.org/10.1080/1536383X.2013.870900
Vplyv C60-fulerenu na dynamiku vtomljuvalьnych procesiv u kambalopodibnomu mьjazi ščura piclja išemii-reperfuzii :
C60 fullerene effect on the dynamics of fatigue processes in rat soleus muscle after ischemia-reperfusion. - In: Biotechnologia acta, ISSN 2410-776X, Bd. 7 (2014), 3, S. 43-51
Im Titel ist "60" tiefgestellt
https://doi.org/10.15407/biotech7.03.043
C 60 fullerene as synergistic agent in tumor-inhibitory doxorubicin treatment. - In: Drugs in R & D, ISSN 1179-6901, Bd. 14 (2014), 4, S. 333-340
https://doi.org/10.1007/s40268-014-0074-4
Low-temperature 1 H NMR spectroscopic study of hydration properties of a hybrid system based on nanosilica, DNA and doxorubicin in the presence of C 60 fullerene. - In: Low temperature physics, ISSN 1090-6517, Bd. 40 (2014), 3, S. 239-245
http://dx.doi.org/10.1063/1.4866907
Chemistry on graphene, 2014. - Online-Ressource (PDF-Datei: I, 105 S., 53,61 MB) Ilmenau : Techn. Univ., Diss., 2014
Das hohe Auflösungsvermögen moderner Transmissions-Elektronenmikroskope (TEM) unter einem Angstrom ermöglicht die Untersuchung von Materialien auf atomarer Ebene. Mit dem TEM können sowohl die atomare Struktur als auch dynamische Prozesse direkt beobachtet und damit Rückschlüsse auf physikalische und chemische Eigenschaften gezogen werden. Diese Arbeit beschäftigt sich mit der Untersuchung und Charakterisierung von Graphen - einer einlagigen Kohlenstoffschicht mit herausragenden physikalischen und chemischen Eigenschaften - mit Hilfe unterschiedlicher TEM Verfahren. Einerseits konnte die Qualität von unterschiedlich hergestellten Graphen-Proben an Hand von Strukturuntersuchungen verglichen werden. Andererseits wurden die Einsatzmöglichkeiten von Graphen als Träger- und Schutzschicht, Ausgangsmaterial, Substrat, sowie als Nano-Behälter untersucht. Als Trägermaterial wurde Graphen für Nanoteilchen verwendet, welche für biologische Anwendungen konzipiert wurden. Um geeignete Proben für TEM Untersuchungen herzustellen, waren Oberflächenpräparation und Optimierung der Transfermethode entscheidend. Die TEM Untersuchungen an Nanoteilchen (Au NCs, QDs und Nano-Diamanten mit atomaren Fehlstellen) auf Graphen ermöglichten eine direkte Beschreibung ihrer atomaren Struktur, Größe und Größenverteilung. Untersuchungen von DNA auf Graphen zeigten, dass die Abbildung von biologischen Proben auf Graphen-Trägermaterialen mittels TEM möglich ist. Des Weiteren konnte nachgewiesen werden, dass Graphen auch als Schutzschicht für strahlempfindliche Materialien, wie z.B. C3N4 oder MoS2, geeignet ist und damit die Abbildung dieser Proben in ihrem ursprünglichen Zustand erlaubt. In Bestrahlungexperimenten konnten einwandige Kohlenstoff-Nanoröhrchen aus einer Graphen-Doppellage geformt werden. In einem weiteren Experiment gelang es aus den Adsorbaten auf Graphen eine weitere Graphen-Lage (in-situ) unter Elektronenbeschuss zu wachsen. Weitere Experimente an Wasser, das zwischen zwei Graphen-Lagen eingeschlossen wurde (nano-confinement), erlaubten erstmals die direkte Beobachtung und Charakterisierung einer neuen Modifikation von Eis bei Zimmertemperatur: dem "square ice". Nicht zuletzt wurde im Rahmen dieser Arbeit eine neue Methode zur Säuberung von Graphen-Oberflächen von Adsorbaten mit Hilfe von Adsorptionsmitteln entwickelt, dem sogenannten "dry-cleaning".
http://www.db-thueringen.de/servlets/DocumentServlet?id=25509
Long-term stabilization of organic solar cells using hindered phenols as additives. - In: ACS applied materials & interfaces, ISSN 1944-8252, Bd. 6 (2014), 21, S. 18525-18537
http://dx.doi.org/10.1021/am5024989
Nitrogen-doped multi-walled carbon nanotubes modified with platinum, palladium, rhodium and silver nanoparticles in electrochemical sensing. - In: Journal of nanoparticle research, ISSN 1572-896X, Bd. 16 (2014), 10, 2660, insges. 13 S.
https://doi.org/10.1007/s11051-014-2660-3
Multi-walled carbon nanotubes modified with gold nanoparticles with various diameters for the simultaneous analysis of dopamine and uric acid in a single experiment. - In: Sensor letters, ISSN 1546-1971, Bd. 12 (2014), 1, S. 153-159
http://dx.doi.org/10.1166/sl.2014.3231
Characterization of C 60 fullerene complexation with antibiotic doxorubicin. - In: Physical chemistry, chemical physics, ISSN 1463-9084, Bd. 16 (2014), 42, S. 23164-23172
http://dx.doi.org/10.1039/C4CP03367A
Toxic effect of C 60 fullerene-doxorubicin complex towards tumor and normal cells in vitro. - In: Biopolymers & cell, ISSN 1993-6842, Bd. 30 (2014), 5, S. 372-376
https://doi.org/10.7124/bc.0008B4
Improvement of P3HT-ICBA solar cell photovoltaic characteristics due to the incorporation of the maleic anhydride additive: P3HT morphology study of P3HT-ICBA and P3HT-ICBA-MA films by means of X-band LESR. - In: Synthetic metals, Bd. 197 (2014), S. 210-216
http://dx.doi.org/10.1016/j.synthmet.2014.09.012
Insights into electrocatalytic activity of epitaxial graphene on SiC from cyclic voltammetry and ac impedance spectroscopy. - In: Journal of solid state electrochemistry, ISSN 1433-0768, Bd. 18 (2014), 9, S. 2555-2562
http://dx.doi.org/10.1007/s10008-014-2512-1
Disposable multiwalled carbon nanotube printed film electrochemical determination of acetaminophen, dopamine, and uric acid. - In: Analytical letters, ISSN 1532-236X, Bd. 47 (2014), 17, S. 2829-2843
http://dx.doi.org/10.1080/00032719.2014.926553
Non-enzymatic analysis of cholesterol in acetonitrile solutions. - In: Physics and chemistry of liquids, ISSN 1029-0451, Bd. 52 (2014), 2, S. 601-607
http://dx.doi.org/10.1080/00319104.2014.890895
Multifrequency X,W-band ESR study on photo-induced ion radical formation in solid films of mono- and di-fullerenes embedded in conjugated polymers. - In: Carbon, ISSN 1873-3891, Bd. 77 (2014), S. 11-17
http://dx.doi.org/10.1016/j.carbon.2014.04.062
Structure and electrochemical properties of aqueous suspensions of functionalized single- and multiwalled carbon nanotubes. - In: Ukrainian journal of physics, ISSN 2071-0186, Bd. 59 (2014), 4, S. 433-438
Interceptor effect of C 60 fullerene on the in vitro action of aromatic drug molecules. - In: European biophysics journal, ISSN 1432-1017, Bd. 43 (2014), 6/7, S. 265-276
http://dx.doi.org/10.1007/s00249-014-0960-2
Complexation of aromatic drugs with single-walled carbon nanotubes. - In: Journal of nanoparticle research, ISSN 1572-896X, Bd. 16 (2014), 7, 2472, insges. 14 S.
https://doi.org/10.1007/s11051-014-2472-5
On the origin of C 60 fullerene solubility in aqueous solution. - In: Langmuir, ISSN 1520-5827, Bd. 30 (2014), 14, S. 3967-3970
http://dx.doi.org/10.1021/la404976k
Influence of single-walled carbon nanotubes on thermal expansion of water. - In: International journal of thermophysics, ISSN 1572-9567, Bd. 35 (2014), 1, S. 19-31
http://dx.doi.org/10.1007/s10765-013-1552-6
Nitrogen-doped carbon nanotubes modified with gold nanoparticles for simultaneous analysis of N-acetylcysteine and acetaminophen. - In: Journal of solid state electrochemistry, ISSN 1433-0768, Bd. 18 (2014), 3, S. 629-637
http://dx.doi.org/10.1007/s10008-013-2298-6
Evidence of entropically driven C 60 fullerene aggregation in aqueous solution. - In: The journal of chemical physics, ISSN 1089-7690, Bd. 140 (2014), 10, 104909, insges. 5 S.
https://doi.org/10.1063/1.4867902
Speciation behavior of copper(II) acetate in simple organic solvents - revealing the effect of trace water. - In: European journal of inorganic chemistry, ISSN 1099-0682, (2014), 8, S. 1407-1412
http://dx.doi.org/10.1002/ejic.201400036
Electrocatalytic activity of nitrogen-doped carbon nanotubes decorated with gold nanoparticles. - In: Electrocatalysis, ISSN 1868-5994, Bd. 5 (2014), 1, S. 87-95
http://dx.doi.org/10.1007/s12678-013-0175-9
Voltammetric study on pristine and nitrogen-doped multi-walled carbon nanotubes decorated with gold nanoparticles. - In: Microchimica acta, ISSN 1436-5073, Bd. 181 (2014), 3/4, S. 329-337
https://doi.org/10.1007/s00604-013-1118-0
Influence of ozone on N-doped multi-walled carbon nanotubes. - In: Journal of experimental nanoscience, ISSN 1745-8099, Bd. 9 (2014), 4, S. 421-431
http://dx.doi.org/10.1080/17458080.2012.664792
From liquid to solid-state fluorescence: tricyclic lactones based on 4-hydroxy-1,3-thiazoles. - In: Synthesis, ISSN 1437-210X, Bd. 46 (2014), 1, S. 126-134
http://dx.doi.org/10.1055/s-0033-1340048
The effect of boron nitride on electrical conductivity of nanocarbon-polymer composites. - In: Journal of materials science, ISSN 1573-4803, Bd. 49 (2014), 5, S. 2098-2105
http://dx.doi.org/10.1007/s10853-013-7901-9
Thermodynamic investigation of ferrocyanide/ferricyanide redox system on nitrogen-doped multi-walled carbon nanotubes decorated with gold nanoparticles. - In: Thermochimica acta, Bd. 576 (2014), S. 1-8
http://dx.doi.org/10.1016/j.tca.2013.11.020
Vplyv fulerenu C60 na ATPaznu aktyvnistь ta superprecypitaciju aktomiozynu skeletnych mьjaziv :
Effect of fullerene C60 on ATPase activity and superprecipitation of skeletal muscle actomyosin. - In: The Ukrainian biochemical journal, ISSN 2413-5003, Bd. 85 (2013), 2, S. 20-26
Im Titel ist "60" tiefgestellt
http://dx.doi.org/10.15407/ubj85.02.020
Electrochemical sensor consisting of nitrogen-doped multi-walled carbon nanotubes decorated with platinum nanoparticles. - In: Advanced Electrochemistry, ISSN 2330-1554, Bd. 1 (2013), 2, S. 153-160
http://dx.doi.org/10.1166/adel.2013.1029
Effect of functionalization of nitrogen-doped carbon nanotubes on their electrochemical properties. - In: Advanced Electrochemistry, ISSN 2330-1554, Bd. 1 (2013), 2, S. 136-141
http://dx.doi.org/10.1166/adel.2013.1018
Multi-walled carbon nanotubes printed on thin textile films for electrochemical sensing. - In: Advanced Electrochemistry, ISSN 2330-1554, Bd. 1 (2013), 1, S. 67-74
http://dx.doi.org/10.1166/adel.2013.1014
Rhodium catalysts build into the structure of a silicate support in the hydroformylation of alkenes. - In: Central European journal of chemistry, ISSN 1644-3624, Bd. 11 (2013), 4, S. 561-568
http://dx.doi.org/10.2478/s11532-012-0186-z
Multi-walled carbon nanotubes printed onto polycarbonate substrate for electrochemical sensing. - In: Sensor letters, ISSN 1546-1971, Bd. 11 (2013), 8, S. 1465-1471
http://dx.doi.org/10.1166/sl.2013.2987
The interaction of the carbon nanoparticles with human cell plasma membrane. - In: Biosensing and nanomedicine VI, ISBN 978-0-8194-9662-1, (2013), S. 88120X-1-88120X-6
Nitrogen-doped multi-walled carbon nanotubes for paracetamol sensing. - In: Ionics, ISSN 1862-0760, Bd. 19 (2013), 12, S. 1897-1905
http://dx.doi.org/10.1007/s11581-013-0930-1
Printed one-time-use carbon nanotube-based films for sensing applications. - In: Sensor letters, ISSN 1546-1971, Bd. 11 (2013), 3, S. 596-602
http://dx.doi.org/10.1166/sl.2013.2761
Synthese und Funktionalisierung von Fulleren C 60 und seinen Derivaten für die Anwendung in biologischen Systemen, 2013. - Online-Ressource (PDF-Datei: V, 138 Bl., 1,87 MB) : Ilmenau, Techn. Univ., Diss., 2013
Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
Die Modifizierung von C60 und seinen Derivaten mit polaren Seitenketten zur Verbesserung der Löslichkeit in polarem und vor allem wässrigem Medium ist für biologische und medizinische Anwendungen von entscheidender Bedeutung. Obwohl Fullerenderivate bereits in zahlreichen biologischen Systemen Anwendung gefunden haben, sind ihre Wechselwirkungsmechanismen mit biologischen Strukturen nahezu unbekannt. Die Funktionalisierung von Fullerenverbindungen mit Fluoreszenzfarbstoffen sollte daher einen Beitrag zur Aufklärung dieser Mechanismen leisten können. Zur Funktionalisierung wurden verschiedene Farbstoffe ausgewählt, die sich entweder von einer Fluorescein- oder einer Anilingrundstruktur ableiten. Die mit Amino- oder Isothiocyanatgruppen funktionalisierten Farbstoffe wurden mit Fullerencarbonsäuren und -Carbonsäurechloriden sowie Fulleropyrrolidinen unter Bildung der Farbstoff-funktionalisierten C60- und C70-Verbindungen umgesetzt. In ersten Untersuchungen mit einer Modellmembran zeigten die verschiedenen Farbstofffullerene sehr unterschiedliches Verhalten und interessante Fluoreszenzeigenschaften. Um die Anbindung von Farbstoffen zu ermöglichen, die nicht über Aminofunktionen verfügen, wurden verschiedene Synthesewege zur Einführung von Aminogruppen an der Fullerenoberfläche untersucht. Diese reichen von der Umsetzung mit aminofunktionalisierten Diazomethanen bis zur Anbindung von Diaminoglykolen. Mit der Funktionalisierung mit Diaminoglykolen wird die Hoffnung verbunden, Fullerenderivate synthetisieren zu können, die eine deutlich verbesserte Löslichkeit in polaren Medien oder sogar Wasser zeigen und zusätzlich durch Farbstoffe funktionalisiert werden können. Über diese Synthesemethode ließe sich eine Verbindungsklasse synthetisieren, die für biologische und medizinische Anwendungen enormes Potential besitzt.
http://nbn-resolving.de/urn:nbn:de:gbv:ilm1-2013000263
C60 fullerene aggregation in aqueous solution. - In: Physical chemistry, chemical physics, ISSN 1463-9084, Bd. 15 (2013), 23, S. 9351-9360
https://doi.org/10.1039/C3CP50187F
Comparative study of membranotropic action of single- and multi-walled carbon nanotubes. - In: Journal of bioscience and bioengineering, ISSN 1347-4421, Bd. 115 (2013), 6, S. 674-679
http://dx.doi.org/10.1016/j.jbiosc.2012.12.016
Analysis of dopamine on printed polymer thin film consisting of multi-walled carbon nanotubes. - In: Monatshefte für Chemie, ISSN 1434-4475, Bd. 144 (2013), 5, S. 581-588
http://dx.doi.org/10.1007/s00706-012-0914-2
Complexation of C 60 fullerene with aromatic drugs. - In: ChemPhysChem, ISSN 1439-7641, Bd. 14 (2013), 3, S. 568-578
http://dx.doi.org/10.1002/cphc.201200938
Hydration properties of nanosilica, modified by adsorbed C 60 fullerene. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 44 (2013), 2/3, S. 244-248
http://dx.doi.org/10.1002/mawe.201300088
Der Einfluss der Bandstruktur auf die Elektronentransferkinetik von niedrigdimensionalem Kohlenstoff :
The role of band structure in electron transfer kinetics in low-dimensional carbon. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 44 (2013), 2/3, S. 226-230
http://dx.doi.org/10.1002/mawe.201300093
Der Einfluss von Verunreinigungen auf die vibratorische und elektronische Struktur von Graphen :
Influence of impurity defects on vibrational and electronic structure of graphene. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 44 (2013), 2/3, S. 183-187
http://dx.doi.org/10.1002/mawe.201300086
Impact of single-walled carbon nanotubes on the medullary neurons in spontaneously hypertensive rats. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 44 (2013), 2/3, S. 171-175
http://dx.doi.org/10.1002/mawe.201300112
Magnetoresistance of multi-walled carbon nanotubes modified with iron. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 44 (2013), 2/3, S. 161-166
http://dx.doi.org/10.1002/mawe.201300092
Wirkung von fulleren (C 60) auf die Genexpression von signalübertragenden ERN1-Genen in humanen Astrozyten :
Effect of C 60 fullerene on the expression of ERN1 signaling related genes in human astrocytes. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 44 (2013), 2/3, S. 150-155
http://dx.doi.org/10.1002/mawe.201300084
Störung des Antioxidanzien- und Prooxidanziengleichgewichtes in Leukämiezellen (L1210) durch photochemisch angeregtes Fulleren C 60 :
Photoexcited fullerene C 60 disturbs prooxidant-antioxidant balance in leukemic L1210 cells. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 44 (2013), 2/3, S. 139-143
http://dx.doi.org/10.1002/mawe.201300105
Magnetic properties of N-doped multi-walled carbon nanotubes. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 44 (2013), 2/3, S. 136-138
http://dx.doi.org/10.1002/mawe.201300083
Charakterisierung der Antitumor-Immun-Antwort auf C 60 Fullerene :
Evaluation of the antitumor immune response to C 60 fullerene. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 44 (2013), 2/3, S. 124-128
http://dx.doi.org/10.1002/mawe.201300082
Effect of multi-walled iron-filled carbon nanotubes on ATPase activity and superprecipitation of natural actomyosin. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 44 (2013), 2/3, S. 103-106
http://dx.doi.org/10.1002/mawe.201300103
Electrochemical responses of carbon nanotubes-based films printed on polymer substances. - In: Ionics, ISSN 1862-0760, Bd. 19 (2013), 2, S. 335-341
http://dx.doi.org/10.1007/s11581-012-0729-5
Compressibility of water containing single-walled carbon nanotubes. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 21 (2013), 1, S. 24-30
http://dx.doi.org/10.1080/1536383X.2011.574301
Synthesis and characterization of ZnO/4-mercaptobenzoic acid/Au composite particles. - In: Materials letters, ISSN 1873-4979, Bd. 91 (2013), S. 103-106
http://dx.doi.org/10.1016/j.matlet.2012.09.090
Non-enzymatic analysis of glucose on printed films based on multi-walled carbon nanotubes. - In: Microchimica acta, ISSN 1436-5073, Bd. 179 (2012), 1/2, S. 157-161
We report on the fabrication of an enzyme-free electrochemical sensor for glucose based on a printed film consisting of multi-walled carbon nanotubes (MWCNTs). The MWCNT-based film can be produced by means of a flexographic printing process on a polycarbonate (PC) substrate. The electrochemical response of the MWCNT-based film (referred to as MWCNT-PC) towards the oxidation of glucose at pH 7 was studied by means of cyclic voltammetry and electrochemical impedance spectroscopy. The MWCNT-PC film exhibits substantial electrocatalytic activity towards the oxidation of glucose at an anodic potential of 0.30 V (vs. Ag/AgCl). The findings reveal that the MWCNT-PC film enables non-enzymatic sensing of glucose with a detection limit as low as 2.16 mu M and a sensitivity of 1045 mu Aa (TM) mM(-1)a (TM) cm(-2).
https://doi.org/10.1007/s00604-012-0881-7
Influence of concentration of supporting electrolyte on electrochemistry of redox systems on multi-walled carbon nanotubes. - In: Physics and chemistry of liquids, ISSN 1029-0451, Bd. 50 (2012), 5, S. 661-668
In the present work, the effect of the concentration of supporting electrolyte on the electrochemical behaviour of the redox couple ferrocyanide/ferricyanide, [Fe(CN)(6)](3-/4-) on film consisted of multi-walled carbon nanotubes (MWCNTs) was investigated. The MWCNTs were selectively grown on oxidised silicon substrate by means of catalytic chemical vapour deposition (CCVD) technique with decay of acetonitrile (ACN) in the presence of ferrocene (FeCp2) that served as catalysts. For the electrochemistry studies, the techniques of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in three-electrode system were employed. The correlation between the solution's ionic strength and the electrochemical impedance parameters are discussed.
http://dx.doi.org/10.1080/00319104.2012.663496
Electrochemical responses and sensitivities of films based on multi-walled carbon nanotubes in aqueous solutions. - In: Journal of solution chemistry, ISSN 1572-8927, Bd. 41 (2012), 11, S. 2047-2057
http://dx.doi.org/10.1007/s10953-012-9925-1
Using C 60 fullerenes for photodynamic inactivation of mosquito iridescent viruses. - In: Journal of enzyme inhibition and medicinal chemistry, ISSN 1475-6374, Bd. 27 (2012), 4, S. 614-617
This article describes the photodynamic inactivation of mosquito iridescent virus (MIV) Aedes flavescens in the presence of water-soluble C-60 fullerenes. It has been observed that the photodynamic inactivation of MIV for about 1 h reduces the infectious titre of the virus in large wax-moth larvae Galleria mellonella to 4.5 lg ID50 /mL. The influence of the C-60 concentration on its anti-viral activity was tested in the concentration range from 1 to 0.001 mg/mL. It has been found that C-60 is able to inactivate the iridovirus even in low concentrations. Consequently, the findings of this work suggest that photoexcited C-60 fullerenes can be successfully used for the inactivation of iridoviruses in biological systems.
http://dx.doi.org/10.3109/14756366.2011.601303
Effect of iron-doped multi-walled carbon nanotubes on lipid model and cellular plasma membranes. - In: Materials science & engineering, ISSN 1873-0191, Bd. 32 (2012), 6, S. 1486-1489
The aim of the present work was the study of the interaction of multi-walled carbon nanotubes filled with iron (Fe-MWCNTs) with bimolecular lipid model membrane (BLM) and cellular plasma membrane (PM). The findings demonstrate that the Fe-MWCNTs adsorb on the BLM surface with possible partial build up in the hydrophobic area of fatty acid residues of lipids and increase its specific conductivity and capacity. Furthermore, upon interaction with the PM, the Fe-MWCNTs form channels which allow the flow of water to the cells and the externalization of phosphatidylserine from the inner to the outer PM leaflet.
http://dx.doi.org/10.1016/j.msec.2012.04.029
Electrochemical and thermodynamic properties of hexacyanoferrate(II)/(III) redox system on multi-walled carbon nanotubes. - In: The journal of chemical thermodynamics, ISSN 0021-9614, Bd. 54.2012 (Nov.), S. 35-40
Novel films consist of multi-walled carbon nanotubes (MWCNT) were fabricated by means of catalytic chemical vapor deposition (CVD) technique with decomposition of either acetonitrile (ACN) or benzene (BZ) using ferrocene (FeCp2) as catalyst. The electrochemical and thermodynamic behavior of the ferrocyanide/ferricyanide, [Fe(CN)(6)](3-/4-) redox couple on synthesized MWCNT-based films was investigated by means of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) techniques at T = (278.15, 283.15, 293.15, and 303.15) K. The redox couple [Fe(CN)(6)](3-/4-) behaves quasi-reversibly on fabricated MWCNT-based films and its reversibility is enhanced upon increasing temperature. Namely, the findings establish that with the rise in temperature the barrier for interfacial electron transfer decreases, leading, consequently, to an enhancement of the kinetics of the charge transfer process. According to thermodynamics the equilibrium of the redox process is shifted towards the formation of [Fe(CN)(6)](3-) at elevated temperatures.
http://dx.doi.org/10.1016/j.jct.2012.03.018
Water-soluble pristine fullerenes C60 increase the specific conductivity and capacity of lipid model membrane and form the channels in cellular plasma membrane. - In: Journal of biomedical nanotechnology, ISSN 1550-7041, Bd. 8 (2012), 3, S. 522-527
Im Titel ist "60" tiefgestellt
The aim of the present work was the investigation of the interaction of water-soluble pristine fullerenes C-60 with bimolecular lipid model membrane (BLM) and cellular plasma membrane (PM). The findings demonstrate that the fullerenes C-60 at low concentrations, namely in the concentration range of 1.0 x 10(-4)-1.0 mg . ml(-1), are preferentially incorporated into the hydrophobic region of BLM, increasing, thus, its specific conductivity and specific capacity. Furthermore, upon interaction of fullerenes C-60 with PM, pores or other type of local defects are formed, which are wide enough in order to permit the passage of water molecules across the cell membrane resulting to the externalization of phosphatidylserine from the inner to the outer PM leaflet.
http://dx.doi.org/10.1166/jbn.2012.1404
Oxidation of dopamine on multi-walled carbon nanotubes. - In: Journal of solid state electrochemistry, ISSN 1433-0768, Bd. 16 (2012), 6, S. 2217-2226
Novel films consisting of multi-walled carbon nanotubes (MWCNTs) were fabricated by means of the chemical vapor deposition technique with decomposition of either acetonitrile (ACN) or benzene (BZ) in the presence of ferrocene (FeCp2) which served as catalyst. The electrochemical response of the two different kinds of MWCNT-based films, further referred to as MWCNT-ACN and MWCNT-BZ, towards the oxidation of dopamine (DA) to dopamine-o-quinone (DAQ) was tested by means of cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy. Both MWCNT-based films exhibit quasi-reversible response towards DA/DAQ with some slight kinetic differences; specifically, the charge-transfer process was found to be faster on MWCNT-ACN (k (s) = 35.3 × 10(-3) cm s(-1)) compared to MWCNT-BZ (k (s) = 6.55 × 10(-3) cm s(-1)). The detection limit of MWCNT-BZ for DA (0.30 mu M) appears to be poorer compared to that of MWCNT-ACN (0.03 mu M), but nevertheless, both MWCNT-based films exhibit greater detection ability compared to other electrodes reported in the literature. The sensitivities of MWCNT-ACN and MWCNT-BZ towards DA/DAQ were determined as 0.65 and 0.22 A M-1 cm(-2), respectively. The findings suggest that the fabricated MWCNT-based electrodes can be successfully applied for the detection of molecules with biological interest.
http://dx.doi.org/10.1007/s10008-012-1647-1
Surface silanization of carbon nanofibers and nanotubes for altering the properties of epoxy composites, 2012. - Online-Ressource (PDF-Datei: VII, 124 Bl. , 3,41 MB) : Ilmenau, Techn. Univ., Diss., 2012
Parallel als Druckausg. erschienen
Diese Arbeit beschreibt die Oberflächenmodifizierung von Kohlenstoffnanofasern (CNFs) und mehrwandigen Kohlenstoffnanoröhren (MWCNTs) sowie die Eigenschaften von damit hergestellten Epoxid-Kompositen. Es wurden Korrelationen zwischen chemischen Oberflächenmodifizierungen und Kompositeigenschaften untersucht.Im ersten Teil wurden nach einer Oxidation zur Erzeugung von Carboxygruppen daran anknüpfend drei unterschiedliche Reaktionswege zur Silanisierung der oxidierten Oberflächen der nanoskaligen Kohlenstoffmaterialien untersucht:direkte Silanisierung mit 3-Glycidoxypropyltrimethoxysilan Reduktion der Carboxygruppen zu den alkoholischen Hydroxygruppen und Silanisierung mit 3-Aminopropyltrimethoxysilan Silanisierung mit 3-Isocyanatopropyltriethoxysilan und weitere Silanisierung mit 3-AminopropyltrimethoxysilanDie Oxidation sowie die Silanisierung der CNFs und MWCNTs wurden systematisch und detailliert anhand verschiedener analytisch-chemischer Methoden charakterisiert.Im zweiten Teil wurden CNFs oder MWCNTs in Epoxidharzen dispergiert und die physikalischen Eigenschaften der daraus hergestellten Nanokomposite beschrieben. So zeigten Epoxid-Komposite, die mit silanisierten CNFs versetzt wurden, verbesserte mechanische Eigenschaften. Auch die elektrische Leitfähigkeit der Epoxid-Komposite stieg mit zunehmendem Gehalt der Nanofüllstoffe, wobei die elektrische Leitfähigkeit von Epoxid-Kompositen mit silanisierten CNFs aufgrund der isolierenden Silanschicht niedriger war als die der Epoxid-Komposite mit unmodifizierten CNFs. Bei MWCNTs-Epoxid-Kompositen bewirkte die Silanisierung eine größere Änderung der elektrischen Leitfähigkeit im Vergleich zu den CNFs-Epoxid-Kompositen. Das Einbringen von CNFs in das Epoxidharz erhöhte die thermische Leitfähigkeit. Die Wärmeleitfähigkeit der Epoxid-Komposite konnte in Abhängigkeit von der Silanmenge auf den CNFs höher oder niedriger sein als die der Epoxid-Komposite mit unmodifizierten CNFs. Die MWCNTs in den Epoxid-Kompositen konnten durch Anlegen eines elektrischen Wechselstromfeldes parallel zu den Feldlinien ausgerichtet werden, was Messungen einer anisotropen elektrischen Leitfähigkeit an den Kompositen belegten.Die nasschemische Silanisierung der nanoskaligen Kohlenstoffmaterialien stellt eine vielseitige und einfache Methode dar, die Eigenschaften von Polymerkompositen gezielt zu modifizieren. Diese Änderungen der Materialeigenschaften wurden dann vor allem durch stärkere Wechselwirkungen an den Grenzflächen zwischen Füllstoffen und Polymer sowie durch eine bessere Verteilung der Füllstoffe in der Polymermatrix erreicht.
http://www.db-thueringen.de/servlets/DocumentServlet?id=20432
Structure-electrical resistivity relationship of N-doped multi-walled carbon nanotubes. - In: Journal of materials science, ISSN 1573-4803, Bd. 47 (2012), 5, S. 2390-2395
Nitrogen-doped multi-walled carbon nanotubes (N-MWCNT) were synthesized by means of catalytic chemical vapor deposition technique using acetonitrile as carbon source material and ferrocene as catalyst. The structure of the synthesized N-MWCNT was characterized by means of microscopic (SEM, HRTEM) as well as spectroscopic (FTIR, Raman) techniques. Furthermore, the specific resistivity and the electrochemical properties of N-MWCNT were investigated and compared with those of pristine MWCNT. The results are discussed in terms of structural differences between pristine MWCNT and N-MWCNT.
http://dx.doi.org/10.1007/s10853-011-6059-6
Low-temperature 1 H-NMR spectroscopic study of doxorubicin influence on the hydrated properties of nanosilica modified by DNA. - In: Journal of materials science. . - Dordrecht : Springer Science + Business Media B.V, 1990- , ISSN: 1573-4838 , ZDB-ID: 2016995-4, ISSN 1573-4838, Bd. 22 (2011), 3, S. 525-532
The effect of the anticancer drug-doxorubicin (Dox) on hydration properties of a nanocomposite material deposited on silica and modified by small amount of DNA (0.6 wt%) was studied by means of (1)H NMR spectroscopy at low temperatures (in the range of 200-280 K). Signals of either weakly (WAW) or strongly (SAW) associated water, as well as water associated with electrondonor groups of the composite surface (ASW), were observed. The findings reveal that, depending on the temperature and the composition of the dispersion medium, fast molecular exchange takes place between different forms of interphase water. The presence of Dox (0.1-0.2 wt%) in the dispersion medium leads to change of the relative concentrations of different forms of water.
http://dx.doi.org/10.1007/s10856-011-4237-3
Using water-soluble C60 fullerenes in anticancer therapy. - In: Cancer nanotechnology, ISSN 1868-6966, Bd. 2 (2011), 1/6, S. 105-110
Im Titel ist "60" tiefgestellt
https://doi.org/10.1007/s12645-011-0020-x
Photo-induced electron transfer in P3DDT, P3OT, M3EH-PPV conjugated polymers blended with maleic anhydride in THF solution under UV flash photolysis studied by means of CW TR ESR. - In: Applied magnetic resonance, ISSN 1613-7507, Bd. 41 (2011), 2/4, S. 195-203
https://doi.org/10.1007/s00723-011-0281-x
ESR and LESR X-band study of morphology and charge carrier interaction in blended P3HT-SWCNT and P3HT-PCBM-SWCNT solid thin films. - In: Synthetic metals, Bd. 161 (2011), 21/22, S. 2241-2248
http://dx.doi.org/10.1016/j.synthmet.2011.08.027
Multi-walled carbon nanotubes as electrode materials for electrochemical studies of organometallic compounds in organic solvent media. - In: Monatshefte für Chemie, ISSN 1434-4475, Bd. 142 (2011), 3, S. 233-242
Films of vertically aligned multi-walled carbon nanotubes (MWCNT) were selectively synthesized on silicon dioxide substrate by catalytic chemical vapor deposition using either benzene or acetonitrile as carbon source and ferrocene (1% w/w) as catalyst. The MWCNT were extensively characterized by using scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis, and Raman spectroscopy. In order to examine the prospective application of the fabricated MWCNT films for the detection of electro-active compounds in organic solvent media, electrochemical studies of the oxidation of cobaltocene (CoCp(2)) to cobaltocenium cation (CoCp (2) (+)) (Cp = cyclopentadienyl anion) in acetonitrile were performed on these films. For this purpose, cyclic voltammetry and electrochemical impedance spectroscopy were employed. The electrochemical parameters for the CoCp (2) (+/0) couple in acetonitrile were derived and compared with those obtained using a conventional glassy carbon electrode. The results demonstrate that the synthesized MWCNT films are promising electrode materials for the electrochemical detection of electro-active species in organic solvents. The MWCNT film formed upon decay of benzene has higher capacitance, less Warburg impedance, and less charge transfer resistance, and consequently it provides faster electron transfer kinetics.
http://dx.doi.org/10.1007/s00706-011-0454-1
Comparative study of mono- and dinuclear complexes of late 3d-metal chlorides with N,N-dimethylformamide in the gas phase. - In: Inorganic chemistry, ISSN 1520-510X, Bd. 50 (2011), 3, S. 771-782
Mono- and binuclear complexes of N,N-dimethylformamide (DMF) with chlorides of the divalent, late 3d metals M = Co, Ni, Cu, and Zn are investigated by means of electrospray ionization (ESI). Specifically, ESI leads to monocations of the type [(DMF)(n)MCl](+) and [(DMF)(n)M(2)Cl(3)](+), of which the species with n = 2 and 3 were selected for in-depth studies. The latter include collision-induced dissociation experiments, gas-phase infrared spectroscopy, and calculations using density functional theory. The mononuclear complexes [(DMF)(n)MCl](+) almost exclusively lose neutral DMF upon collisional activation with the notable exception of the copper complex, for which also a reduction from CuII to CuI concomitant with the release of atomic chlorine is observed. For the dinuclear clusters, there exists a competition between loss of a DMF ligand and cluster degradation via loss of neutral MCl(2) with decreasing cluster stability from cobalt to zinc. For the specific case of [(DMF)(n)ZnCl](+) and [(DMF)(n)Zn(2)Cl(3)](+), ion-mobility mass spectrometry indicates the existence of two isomeric cluster ions in the case of [(DMF)(2)Zn(2)Cl(3)](+) which corroborates parallel theoretical predictions.
http://dx.doi.org/10.1021/ic100759h
Clustering of palladium(II) chloride in acetonitrile solution investigated by electrospray mass spectrometry. - In: International journal of mass spectrometry, ISSN 1387-3806, Bd. 304 (2011), 1, S. 9-14
Solutions of palladium chloride in acetonitrile are investigated by means of electrospray ionization mass spectrometry (ESI-MS). In contrast to several other metal salts previously investigated using ESI-MS, PdCl(2)2 has a pronounced tendency for aggregation to yield [Pd(m)Cl(2m-1)(CH(3)CN)(n)](+) clusters in the positive ion mode and [Pd(m)Cl(2m+1)](-) clusters when the negative ions are sampled, respectively. The observation of these oligomers parallels polymeric structures of PdCl(2) in the solid phase. The positive ions are most abundant for m = 2 and generally associated with several molecules of the solvent, whereas many different cluster sizes occur for the anions which generally do not appear as solvent associates. Parallel conductivity measurements in the condensed phase lend support to a pronounced tendency for aggregation of PdCl(2) in acetonitrile solution.
http://dx.doi.org/10.1016/j.ijms.2011.02.014
Determination of impedance spectroscopic behavior of triphenylphosphine on various electrodes. - In: Analytical letters, ISSN 1532-236X, Bd. 44 (2011), 8, S. 1416-1430
The electrochemical oxidation of triphenylphosphine (Ph(3)P) was investigated by means of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) on glassy-carbon (GC), gold (Au) and multi-walled carbon nanotubes (MWCNT) in acetonitrile (ACN), dichloromethane (DCM), and cyclohexanone (CHN). The electron-transfer kinetics of the redox couple PPh(3)/Ph(3)P(center dot+) on various electrodes was found to increase with the order: Au < MWCNT < GC. The EIS results verify that GC provides faster charge-transfer kinetics since it affords less charge-transfer resistance and thus lower electron-transfer barrier from other electrodes tested. In DCM and CHN greater deviation from reversibility was observed which can be attributed to the poorer polarity of the solvents, which provides an additional barrier for the electron-transfer process.
http://dx.doi.org/10.1080/00032719.2010.520387
Application of films consisting of carbon nanoparticles for electrochemical detection of redox systems in organic solvent media. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 19 (2011), 6, S. 505-516
In the present article, the electrochemical sensitivity and response of films consisting of carbon nanoparticles were examined to test their potential applications as electrode materials for the construction of electrochemical sensors. For this purpose, a film of vertically aligned multi-walled carbon nanotubes (MWCNTs) on silicon dioxide substrate was synthesized by means of catalytic chemical vapor deposition (CVD) at 900oC using ferrocene (FeCp2) as catalyst and acetonitrile (ACN) as a carbon source. Furthermore, bucky-paper (BP) film was produced upon ultrasonic treatment of aqueous solution of single-walled carbon nanotubes (SWCNTs) in the presence of sodium dodecyl sulfate (SDS) micelle. In order to examine the electrochemical activity of the fabricated films, electrochemical studies of the oxidation of ferrocene (FeCp2) to ferrocenium cation (FeCp2+) (where Cp denotes cyclopentadienyl anion) in ACN containing n-tetrabutylammonium hexafluorophosphat (NBu4PF6) as supporting electrolyte were performed. For the electrochemical experiments the techniques of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were employed. The electrochemical parameters of the FeCp2+/0 redox couple in ACN on the fabricated films were determined and compared with those obtained using conventional glassy carbon (GC) electrode. The results demonstrate that the FeCp2+/0 redox couple exposes Nernstian response on either MWCNT or GC electrodes while its response on BP film can be recognized as near Nernstian. The findings verify that the synthesized MWCNT and BP films hold promising and important applications in electro-analytical chemistry.
http://dx.doi.org/10.1080/1536383X.2010.494782
Application of electrochemical impedance spectroscopy for characterisation of the reduction of benzophenone in acetonitrile solutions. - In: Physics and chemistry of liquids, ISSN 1029-0451, Bd. 49 (2011), 6, S. 729-742
http://dx.doi.org/10.1080/00319104.2010.508039
Pristine C60 fullerenes inhibit the rate of tumor growth and metastasis. - In: Experimental oncology, ISSN 1812-9269, Bd. 33 (2011), 3, S. 162-164
Im Titel ist "60" tiefgestellt
Electrochemistry on multi-walled carbon nanotubes in organic solutions. - In: Journal of solution chemistry, ISSN 1572-8927, Bd. 40 (2011), 9, S. 1645-1656
The oxidation of ferrocene (FeCp(2)) to ferrocenium cation were determined. On both electrodes tested, the electron transfer process was found to be quasi-reversible and diffusion controlled in all investigated solvent mixtures. The E (1/2) values were shifted toward less positive potentials with the enrichment of mixtures in MeOH, due probably to the larger Lewis basicity of the MeOH molecules. Furthermore, values of both D and k (s) diminish with the increase of MeOH content following the progressive increase of viscosity of the solvent medium. Among the electrodes probed, GC provides faster electrochemical process since it affords less charge-transfer resistance (R (ct)), and consequently, an insignificant barrier for interfacial electron transfer.
http://dx.doi.org/10.1007/s10953-011-9735-x
Thermodynamic studies on silver and thallium nitrate. - In: International journal of thermophysics, ISSN 1572-9567, Bd. 32 (2011), 9, S. 1950-1965
The molar conductivities (Lambda) of aqueous solutions of silver nitrate and thallium nitrate were measured in the temperature range from 291.15 K to 314.15 K. The Lambda values were analyzed using the Lee-Wheaton model, and the limiting molar conductivities (Lambda(o)) as well as the association equilibrium constants (K(A)) were derived. The center-to-center distances (alpha) of the formed ion pairs were considered to be equal to the Bjerrum's distance. The limiting ion conductivities (lambda(+/-)) were determined. The thermodynamic functions, Gibbs energy (Delta G(A)), enthalpy (Delta H(A)), and entropy (Delta S(A)) for the ion-pair formation process were determined as well. The results are discussed in terms of ion-ion and ion-solvent interactions.
http://dx.doi.org/10.1007/s10765-011-1046-3
Structure and magnetic properties of multi-walled carbon nanotubes modified with cobalt. - In: Carbon, ISSN 1873-3891, Bd. 49 (2011), 13, S. 4443-4448
The magnetic properties of multi-walled carbon nanotubes (MWCNTs) modified with cobalt nanoparticles were studied in the temperatures and magnetic field range of (4.2-290) K and (0.03-5) T, respectively. Nanoparticles of cobalt encapsulated inside MWCNTs were obtained by using the chemical vapor deposition technique. The low temperature SQUID magnetization measurements were supplemented with structural investigations by means of high-resolution transmission electron microscopy, scanning electron microscopy as well as thermogravimetric and X-ray diffraction analysis. X-ray diffraction revealed the presence of MWCNTs, f.c.c. Co and h.c.p. Co phases. The magnetic characterization provided the remanent magnetization value (M(R)) of about 0.07 emu/g (similar to 40% of the saturation moment), while the coercive field (H(C)) value amounts to 600 Oe. Both parameters M(R) and H(C) slightly decrease with the rise of temperature. The substantial magnetization increase observed at low temperatures suggests the existence of nano Co clusters (in the atomic scale size).
http://dx.doi.org/10.1016/j.carbon.2011.06.039
Magnetic properties of multi-walled carbon nanotubes modified with cobalt. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 42 (2011), 1, S. 29-32
Magnetic properties of multi-walled carbon nanotubes (MWCNT) modified with cobalt were studied in detail in the temperature range (4.2-290) K. MWCNT which encapsulate Co nanoparticles were obtained using CVD methods. The low temperature SQUID magnetization measurements were supplemented by structural investigations with thermogravimetric analysis, HRTEM and SEM.
http://dx.doi.org/10.1002/mawe.201100725
Low-frequency two-phonon modes step-like dispersion in resonance raman scattering of single-walled carbon nanotubes. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 42 (2011), 1, S. 33-36
Single-walled carbon nanotubes (SWCNT) synthesized by the arc-discharge method were investigated by Raman spectroscopy in detail. In particular, the sharp peaks in (200.-400) cm(-1) spectral range of SWCNT, associated with low-frequency two-phonon modes, arising from flexural 2D graphite (graphene) ZO- (optical branch) and ZA- (acoustical branch) modes, have been firstly observed.
http://dx.doi.org/10.1002/mawe.201100726
Photodynamic inactivation of mosquito iridovirus (MIV) by C 60 fullerenes. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 42 (2011), 2, S. 136-138
It was shown that water soluble C(60) fullerenes under visible light interact with iridovirus virions of mosquito Aedes flavescens and lead to their destruction. Specifically, the photodynamic inactivation of mosquito iridovirus during 1 h reduced the infectious virus titer in large wax-moth larvae Galleria mellonella on 4 lg ID50/ml. Therefore, for inactivation of iridoviruses in biological systems it is appropriate to use the photoexcited C(60) fullerenes.
http://dx.doi.org/10.1002/mawe.201100745
Sol-Gel induzierte Leitfähigkeitsmodulation von Netzwerken aus Kohlenstoffnanoröhren (CNTs) und deren Ursachen, 2011. - Online-Ressource (PDF-Datei: 142 S., 5541 KB) Ilmenau : Techn. Univ., Diss., 2011
Diese Arbeit behandelt eine neue Methode zur Herstellung einer hochleitfähigen Schichtaus einem CNT/Sol-Gel Verbund. Dazu werden zunächst dünne CNT Netzwerke auf ein elektrisch nicht leitfähiges Substrat aufgebracht und anschließend mit dem Sol-Gel imTauchbeschichtungsverfahren penetriert. Neben dispergentbehafteten CNT Netzwerken wird diese Methode ebenso für dispergentfreie angewendet. Anschließende thermische Prozessierungen der Beschichtungen erlauben dabei die Veränderung der elektrischen Eigenschaften des Komposits aufgrund thermisch induzierter Verdichtungsmechanismen des Sol-Gels. Aufgrund der Möglichkeit der äquivalenten Prozessierung von Sol-Gel freien CNT Netzwerken ist es darüber hinaus möglich, den Einfluss des Sol-Gels auf die CNT Netzwerke zu studieren. Im Zuge dessen wird die unerwartet erhöhte elektrische Leitfähigkeit thermisch speziell behandelter CNT/Sol-Gel Komposite (im Vergleich zum Sol-Gel freienÄquivalent) betrachtet und anhand morphologischer Untersuchungen und temperaturabhängigen elektrischen Eigenschaften die Auswirkungen des Sol-Gels auf das CNTNetzwerk beurteilt. Durch die Anpassung von theoretischen Modellen an die gefundenen experimentellen Daten konnten hierzu spezifische Kennwerte der Beschichtungen ermittelt und miteinander verglichen werden. Es stellte sich heraus, dass ein optimierter elektrischer CNT-CNT Übergang der Komposite maßgeblich verantwortlich für die verbesserten elektrischen Eigenschaften gegenüber der Sol-Gel freien Referenz ist.
http://www.db-thueringen.de/servlets/DocumentServlet?id=18914
Thermal diffusivity of nanocarbon composites. - In: Polymer composites, ISSN 1548-0569, Bd. 32 (2011), 1, S. 14-17
This study was performed to measure the thermal diffusivity of different types of nanocarbon composites. Thermoexfoliated graphite (TEG), ultrasonically dispersed TEG, and multiwalled carbon nanotubes were used as fillers in epoxy polymer matrixes. The nanocarbon filler content was 1-10 wt%. The temperature dependence of the thermal conductivity and the heat capacity were extensively characterized in the temperature range between 150 and 425 K. For this purpose, the thermal diffusivity of the composites was investigated by two experimental methods: dynamic A-calorimeter and photoacoustic. The comparative analysis of thermal diffusivity of compacted TEG samples with different densities and of nanocarbon-epoxy with different filler content was carried out. It was found that for the composites with a low distribution of the nanocarbon filler, the thermal diffusivity increases and that the value is determined by the structural and morphological properties of the filler. The orientation function for the TEG-epoxy composites and the compact TEG samples differs due to the epoxy matrix that reduced anisotropy of the composite. POLYM. COMPOS., 2011. (C) 2010 Society of Plastics Engineers
https://doi.org/10.1002/pc.21009
Penetration based CNT/Sol-Gel composite films and their remarkable electrical properties. - In: Microelectronic engineering, Bd. 88 (2011), 8, S. 2513-2525
In this work we present a novel method for CNT/Sol-Gel film preparation, combining low resistivity and improved adhesion behaviour on glass substrates. Naturally occurring voids, with diameters of 50-100 nm, in sprayed CNT networks are used for SolGel penetration via dip coating method. Thermal treatments, for composite film densification, in the range of 200-700 ˚C are investigated and electrical properties were compared to identically treated reference samples with the same batch of nanotubes but without Sol-Gel. The resistivity of such composite films, with best value of similar to 0.03 Omega cm for MWNTs, is two orders of magnitudes lower than previously reported for CNT/Sol-Gel composites. Surprisingly the surface resistance of the composite film shows 25% improvement compared to thermally equal treated pure CNT films. In addition, crosscut adhesion behaviour is investigated, including tape test, showing good performance for composite films, where Sol-Gel acts as an adhesion promoter.
http://dx.doi.org/10.1016/j.mee.2011.01.015
Interaction of N-fluorescein-5-isothiocyanate pyrrolidine-C60 with a bimolecular lipid model membrane. - In: Materials science & engineering, ISSN 1873-0191, Bd. 31 (2011), 5, S. 1148-1150
http://dx.doi.org/10.1016/j.msec.2011.02.026
The effect of photoexcited fullerenes C60 on activity of antioxidative enzymes in Jurkat cells. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 250
O6.43.
Photoinduced cytotoxic effect of fullerenes C60 on transformed T-lymphocytes. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 249
O6.42.
The comperative study of carbon nanotubes and fullerenes C60 influence on free cytosolic Ca2+ and ecto-ATPase activity in thymocytes and L1210 cells. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 248
P3.41.
Photodynamic inactivation of mosquito iridovirus (MIV) by C60 fullerenes. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 244
O6.37.
Molecular biosensor on the C60 fullerol clusters in aqueous solution: modeling, functionalizing and photospectroscopy of an interaction with protein amino-acid molecules. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 238
P6.31.
Bioinspired on nanocarbons structures: modeling, creation, spectroscopic characterization of organized by biomolecules structures on the C60 derivatives. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 237
P6.30.
C60 fullerenes modify protein tyrosine phosphorylation patterns in T cells. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 229
P6.22.
MWCNT array electrodes as sensor materials for the detection of biomolecules. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 195
O6.2.
Magnetic properties of multi-walled carbon nanotubes modified with cobalt. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 189
O5.8.
Modeling of structure of carbon nanotubes containing nitrogen. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 141
P3.9.
Modeling of structure of graphene doped by various atoms. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 139
P3.7.
Low-frequency two-phonon modes steplike dispersion in resonance Raman scattering of single-walled carbon nanotubes. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 118
P2.28.
Electrochemistry on multi-walled carbon nanotubes. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 81
O2.5.
Molecular structure of water system with SWCNTS, functionalized by -COOH groups. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 71-72
O1.44.
Dye-functionalized fullerenes for applications in nanobiotechnology. - In: Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology, (2010), S. 18
O1.5.
Ukrainian-German Symposium on Physics and Chemistry of Nanostructures and on Nanobiotechnology : Beregove, the Crimea, Ukraine, 6th-10th September, 2010 : book of abstracts. - Kyiv, 2010. - 266 SeitenLiteraturangaben
Structure and thermal stability of Co- and Fe-intercalated double graphene layers. - In: Journal of computational and theoretical nanoscience, ISSN 1546-1963, Bd. 7 (2010), 6, S. 996-999
http://dx.doi.org/10.1166/jctn.2010.1444
Hyperthermic effect of multi-walled carbon nanotubes stimulated with near infrared irradiation for anticancer therapy: in vitro studies. - In: Experimental oncology, ISSN 1812-9269, Bd. 32 (2010), 1, S. 48-50
Electrochemical studies of the bis(triphenyl phosphine) ruthenium(II) complex, cis -[RuCl2(L)(PPh3)2], with L = 2-(2 -pyridyl)quinoxaline. - In: Journal of coordination chemistry, ISSN 1029-0389, Bd. 63 (2010), 20, S. 3517-3530
http://dx.doi.org/10.1080/00958972.2010.516362
Radiation modification of polyvinyl chloride nanocomposites with multi-walled carbon nanotubes. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 41 (2010), 8, S. 675-681
http://dx.doi.org/10.1002/mawe.201000556
Structure and magnetic properties of multi-walled carbon nanotubes modified with iron. - In: Low temperature physics, ISSN 1090-6517, Bd. 36 (2010), 12, S. 1086-1090
http://dx.doi.org/10.1063/1.3530422
Effect of small addition of C 60 fullerenes on the hydrated properties of nanocomposites based on highly dispersed silica and DNA. - In: Chemical physics letters, Bd. 496 (2010), 1/3, S. 152-156
http://dx.doi.org/10.1016/j.cplett.2010.07.001
Electrocatalytic properties of carbon nanotube carpets grown on Si-wafers. - In: Carbon, ISSN 1873-3891, Bd. 48 (2010), 15, S. 4489-4496
http://dx.doi.org/10.1016/j.carbon.2010.08.009
Detektion leicht flüchtiger organischer Verbindungen mikrobiellen Ursprungs (MVOC) mittels Ionenmobilitätsspektroskopie (IMS), 2010. - Online-Ressource (PDF-Datei: 171 S., 2560 KB) Ilmenau : Techn. Univ., Diss., 2010
Spuren leicht flüchtiger organischer Verbindungen mikrobiellen Ursprungs (MVOC) in der Luft von Innenräumen können das Vorhandensein von Schimmelpilzen indizieren. Die Anwendung der Ionenmobilitätsspektrometrie (IMS) zur Detektion von leicht flüchtigen schimmelpilzspezifischen Verbindungen ist wegen ihrer hohen Empfindlichkeit vielversprechend. Um dieses analytisch-chemische Verfahren für eine Innenraumdiagnostik zu nutzen, wurde ein mobil einsetzbares Gerät zur vor-Ort-Detektion getestet.Im ersten Teil der Arbeit wurden MVOC-Prüfgase im Labor generiert. Die Prüfgase wurden durch permeative Beimengungen in einen definierten Gasstrom hergestellt. Anhand dieser Prüfgase wurden die typischen IMS-Parameter, wie reduzierte Mobilität (K0), relative Driftzeit (trd), Konzentrationsabhängigkeit der Signale und daraus resultierend die Nachweisgrenze des Ionenmobilitätsspektrometer ermittelt. Die bestimmten Nachweisgrenzen der 14 untersuchten MVOC liegen im Bereich zwischen 2 und 192 myg m 3 (1 bis 51 ppbV).Im zweiten Teil wurden sieben oft im Innenraum nachgewiesene Schimmelpilzarten auf Nährmedien kultiviert und ihre produzierten MVOC detektiert. Dabei wurde festgestellt, dass Schimmelpilze art- und altersabhängige MVOC-Emissionen aufweisen. Eine statistische Auswertung und Bestätigung zeigte die Anwendung der Hauptkomponentenanalyse (PCA). Versuchsbegleitend erfolgte eine Identifizierung der MVOC durch gaschromatographische Analysen und bestätigte die IMS-Ergebnisse.Beim Schimmelpilzwachstum einer Mischsporenkultur auf drei verschiedenen Baumaterialien wurden die produzierten MVOC detektiert. Die IMS-Spektren wurden chemometrisch durch eine PCA ausgewertet. Es können die Spektren von unbeimpften und mit Schimmelpilzkulturen beimpften Baumaterialien damit unterscheiden werden ohne die stoffliche Zusammensetzung der Emissionskammerluft zu kennen.Im letzten Teil dieser Arbeit wurde das IMS in 27 Feldversuchen eingesetzt, um MVOC und damit ein Schimmelpilzwachstum in Innenräumen zu detektieren. In 59 % der Fälle wurde eine positive Korrelation zwischen einem sichtbaren Schimmelpilzbefall und den mittels IMS detektierten MVOC ermittelt.
http://www.db-thueringen.de/servlets/DocumentServlet?id=16400
Preparations, characteristics, and applications of carbon-based nanomaterials, 2010. - Online-Ressource (PDF-Datei: 138 S., 2721 KB) : Ilmenau, Techn. Univ., Diss., 2010
Parallel als Druckausg. erschienen
Es wird über Herstellungen, Eigenschaften und Anwendungen von dimeren Fullerenoxiden und von Anordnungen senkrecht ausgerichteter, mehrwandiger Kohlenstoffnanoröhren - beides nanostrukturierte Kohlenstoffmaterialien - berichtet. Direkte und spezifische Synthesen sowie Isolationen von dimeren Fullerenoxiden in präperativen Mengen werden beschrieben. Oxidative und thermische Stabilität, elektronische Absorptionseigenschaften und Elektronenakzeptorstärke von dimeren Fullerenoxiden werden erörtert. Die Verwendung von dimeren Fullerenoxiden in Plastiksolarzellen wird beschrieben. Die Herstellung und elektrochemische Reinigung von Anordnungen senkrecht ausgerichteter, mehrwandiger Kohlenstoffnanoröhren werden erläutert. Kapazitive Eigenschaften und Elektronenübertragungseigenschaften von Elektroden basierend auf solchen Anordnungen werden erörtert. Die nicht-enzymatische Glukosedetektion mittels solcher Kohlenstoffnanoröhren-Elektroden wird beschrieben
http://www.db-thueringen.de/servlets/DocumentServlet?id=15686
Electrochemical impedance spectroscopy and cyclic voltammetry of cis-[Cr(bipy)2(SCN)2]I (where bipy: 2,2'-bipyridine) in polar solvents. - In: Journal of solution chemistry, ISSN 1572-8927, Bd. 39 (2010), 6, S. 897-908
http://dx.doi.org/10.1007/s10953-010-9549-2
Bioinspired and biointegrated materials as new frontiers of nanomaterials. 1 : Symposium M of the 2009 E-MRS spring meeting Strasbourg, France, June 8 - 12, 2009. - Amsterdam [u.a.] : Elsevier, 2010. - VI, 199 S.. - (Materials science & engineering)
Biomimetic hydroxyapatite nanocrystals in composites with C60 and Au-DNA nanoparticles: IR-spectral study. - In: Materials science and engineering. Solid state materials for advanced technology / American Society for Metals. - New York, NY [u.a.] : Elsevier, 1988- , ISSN: 1873-4944 , ZDB-ID: 1492109-1, ISSN 1873-4944, Bd. 169 (2010), 1/3, S. 128-133
http://dx.doi.org/10.1016/j.mseb.2009.10.039
The C60 fullerene molecules integration by ds-, ss-DNA molecules in fluids: optical spectroscopy characterization of the biointerface organization. - In: Materials science and engineering. Solid state materials for advanced technology / American Society for Metals. - New York, NY [u.a.] : Elsevier, 1988- , ISSN: 1873-4944 , ZDB-ID: 1492109-1, ISSN 1873-4944, Bd. 169 (2010), 1/3, S. 85-88
http://dx.doi.org/10.1016/j.mseb.2010.01.063
Synthesis and electrochemistry of multiwalled carbon nanotube films directly attached on silica substrate. - In: Journal of solid state electrochemistry, ISSN 1433-0768, Bd. 14 (2010), 6, S. 1101-1107
http://dx.doi.org/10.1007/s10008-009-0924-0
Investigation of gaseous metabolites from moulds by Ion Mobility Spectrometry (IMS) and Gas Chromatography-Mass Spectrometry (GC-MS). - In: International journal for ion mobility spectrometry, ISSN 1865-4584, Bd. 13 (2010), 1, S. 17-24
http://dx.doi.org/10.1007/s12127-009-0035-8
Photo-induced charge separation process in (PCBM-C 120 O)/(M3EH-PPV) blend solid film studied by means of X and K-bands ESR at 77 and 120 K. - In: Synthetic metals, Bd. 160 (2010), 5/6, S. 485-489
http://dx.doi.org/10.1016/j.synthmet.2009.11.036
Strength improvement of iPP/MWCNT nanocomposites. - In: Polymer composites, ISSN 1548-0569, Bd. 31 (2010), 1, S. 179-184
https://doi.org/10.1002/pc.20799
Electrochemical impedance spectroscopy and cyclic voltammetry of ferrocene in acetonitrile/acetone system. - In: Journal of applied electrochemistry, ISSN 1572-8838, Bd. 40 (2010), 2, S. 409-417
http://dx.doi.org/10.1007/s10800-009-0011-3
Influence of C60 fullerenes on the adhesiveness of MCF-7 cells (breast cancer). - In: Meeting abstracts, ISSN 2151-2043, Bd. MA2009-02 (2009), 37, 2824
Im Titel ist "60" tiefgestellt
https://doi.org/10.1149/MA2009-02/37/2824
MWCNT array electrodes in non-enzymatic detection of biomolecules. - In: Fabrification, modification and investigations of novel forms of carbon, (2009), S. 37
Carbon nanomaterials for advanced applications. - In: Fabrification, modification and investigations of novel forms of carbon, (2009), S. 17
In situ Raman spectroscopy study of oxidation of nanostructured carbons. - Philadelphia, Pa : Drexel University, 2009. - 1 Online-Ressource (xxii, 283 Blätter)
Drexel University, Ph. D. 2009
Includes abstract and vita
The ability to synthesize carbon nanostructures, such as fullerenes, carbon nanotubes, nanodiamond, and mesoporous carbon; functionalize their surface; or assemble them into three-dimensional networks has opened new avenues for material design. Carbon nanostructures possess tunable optical, electrical or mechanical properties, making them ideal candidates for numerous applications ranging from composite structures and chemical sensors to electronic devices and medical implants.Unfortunately, current synthesis techniques typically lead to a mixture of different types of carbon rather than a particular nanostructure with defined size and properties. In order to fully exploit the great potential of carbon nanostructures, one needs to provide purification procedures that allow a selective separation of carbon nanostructures, and methods which enable a control of size and surface functionalization. Oxidation is a frequently used method for purification of carbon materials, but it can also damage or destroy the sample.In situ Raman spectroscopy during heating in a controlled environment allows a time-resolved investigation of the oxidation kinetics and can identify the changes in material structure and composition, thus helping to accurately determine optimal purification conditions. However, while carbon allotropes such as graphite and diamond show unique Raman signals and allow a fast and straightforward identification, the interpretation of Raman spectra recorded from nanostructures containing mixtures of sp, sp2 and sp3 bonded carbon is more complex and the origin of some peaks in Raman spectra of nanocarbons is not yet fully understood.In this study we applied in situ Raman spectroscopy to determine conditions for selective oxidation of carbon nanostructures, such as nanodiamond, nanotubes, carbidederived carbon and carbon onions; accurately measure and control the crystal size; and improve the fundamental understanding of effects of temperature, quantum confinement and surface chemistry on Raman spectra of nanocrystalline materials. Thermogravimetric analysis, X-ray diffraction and high-resolution transmission electron microscopy were used to complement Raman spectroscopy in order to facilitate the analysis and the interpretation of the results.This work has improved our understanding of oxidation of carbon materials, especially selectivity of the oxidation process to different carbon structures in a broad temperature range. The results of this study have been used to develop simple and environmentally friendly procedures for purification and surface functionalization of carbon nanoparticles and nanoporous materials.
http://hdl.handle.net/1860/2972
Complexation of late transition metal(II) ions (M = Co, Ni, Cu, and Zn) by a macrocyclic thiacrown ether studied by means of electrospray ionization mass spectrometry. - In: Rapid communications in mass spectrometry, ISSN 1097-0231, Bd. 23 (2009), 11, S. 1550-1556
http://dx.doi.org/10.1002/rcm.4035
Electrochemistry on multi-walled carbon nanotube films. - In: Chemické listy, ISSN 0009-2770, Bd. 103.2009, 15, S. s251
Johann Wilhelm Hittorf : ein bedeutender Physiker und Chemiker des 19. Jahrhunderts. - In: Leipzig - Erfurt: akademische Verbindungen, (2009), S. 105-118
Intercalated fullerene polymers and Raman spectroscopy - vibrations and more?. - In: DPG spring meeting of the Condensed Matter Section with the divisions: Biological Physics, Chemical and Polymer Physics, Dielectric Solids, Dynamics and Statistical Physics, Low Temperature Physics, Magnetism, Metal and Material Physics, Semiconductor Physics, Surface Science, Thin Films, Vacuum Science and Technology as well as the working groups: Industry and Business, Physics of Socio-Economic Systems, 2009, CPP 43.4
Electronic properties of conjugated fullerenes using O-, NH-, or CH 2 -groups as bridges. - In: DPG spring meeting of the Condensed Matter Section with the divisions: Biological Physics, Chemical and Polymer Physics, Dielectric Solids, Dynamics and Statistical Physics, Low Temperature Physics, Magnetism, Metal and Material Physics, Semiconductor Physics, Surface Science, Thin Films, Vacuum Science and Technology as well as the working groups: Industry and Business, Physics of Socio-Economic Systems, 2009, CPP 43.1
Validation of doubling exponent models for the impedance of well-aligned MWCNT array electrodes. - In: Russian journal of electrochemistry, ISSN 1608-3342, Bd. 45 (2009), 10, S. 1145-1148
http://dx.doi.org/10.1134/S102319350910005X
Heterogeneous catalyzed pyridine synthesis using montmorillionite and nanoparticle-impregnated alumina in a continuous micro flow system. - In: Chemical engineering & technology, ISSN 1521-4125, Bd. 32 (2009), 11, S. 1799-1805
http://dx.doi.org/10.1002/ceat.200900368
Electrochemical studies on cis-[Cr III (bipy) 2 (SCN) 2] I3 (where bipy denotes 2,2'-bipyridine) in acetonitrile. - In: Journal of solution chemistry, ISSN 1572-8927, Bd. 38 (2009), 12, S. 1536-1557
http://dx.doi.org/10.1007/s10953-009-9466-4
Can electrospray mass spectrometry quantitatively probe speciation? : hydrolysis of uranyl nitrate studied by gas-phase methods. - In: Inorganic chemistry, ISSN 1520-510X, Bd. 48 (2009), 13, S. 6287-6296
http://dx.doi.org/10.1021/ic900575r
Electrochemical characteristics of well-aligned MWCNT array electrodes. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 17 (2009), 5, S. 548-559
http://dx.doi.org/10.1080/15363830903132990
Application of the extended Langmuir model for the determination of lyophobicity of 1-propanol in acetonitrile. - In: International journal of thermophysics, ISSN 1572-9567, Bd. 30 (2009), 3, S. 910-918
http://dx.doi.org/10.1007/s10765-009-0581-7
K-band ESR studies of structural anisotropy in P3HT and P3HT/PCBM blend polymer solid films: paramagnetic defects after continuous wave Xe-lamp photolysis. - In: Solid state communications, ISSN 1879-2766, Bd. 149 (2009), 21/22, S. 893-897
http://dx.doi.org/10.1016/j.ssc.2009.01.034
Conductometric and voltammetric studies on the bis(triphenyl phosphine) ruthenium(II) complex, cis-[RuCl2(L)(PPh3)2], where L: 2-(2'-pyridyl)quinoxaline. - In: Inorganica chimica acta, ISSN 0020-1693, Bd. 362 (2009), 9, S. 3079-3087
http://dx.doi.org/10.1016/j.ica.2009.02.005
Protective effects of C 60 fullerenes on staurosporine-, cytosine arabinoside- and hydrogen peroxide-induced cell death of normal but not of transformed T lymphocytes. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 40 (2009), 4, S. 308-311
http://dx.doi.org/10.1002/mawe.200800447
Photoluminescence effects on gold nano-particles modified by short single stranded DNA molecules. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 40 (2009), 4, S. 290-293
http://dx.doi.org/10.1002/mawe.200800443
Mechanism of thermal and electrical conductivity in polymer-nanocarbon composites. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 40 (2009), 4, S. 268-272
http://dx.doi.org/10.1002/mawe.200900439
Vergleichende Studie zur biologischen Aktivität von C 60 Fullerenen und Carbon-Nanotubes in Thymuszellen :
Comparative study of biological action of fullerenes C 60 and carbon nanotubes in thymus cells. - In: Materials science and engineering technology, ISSN 1521-4052, Bd. 40 (2009), 4, S. 238-241
http://dx.doi.org/10.1002/mawe.200900433
Studies of ion solvation and ion association of n-tetrabutylammonium hexafluorophosphate and n-tetrabutylammonium tetraphenylborate in various solvents. - In: Fluid phase equilibria, ISSN 0378-3812, Bd. 277 (2009), 1, S. 20-28
http://dx.doi.org/10.1016/j.fluid.2008.11.004
Preparation, characterization, functionalization and application of dimeric fullerene oxides. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 17 (2009), 2, S. 187-207
http://dx.doi.org/10.1080/15363830802672187
Structure and vibrational properties of multi-walled carbon nanotubes irradiated with high-energy electrons. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 17 (2009), 2, S. 123-134
http://dx.doi.org/10.1080/15363830802671700
Biocompatibility of pristine carbon nanotubes. - In: Meeting abstracts, ISSN 2151-2043, Bd. MA2008-01 (2008), 33, 1079
https://doi.org/10.1149/MA2008-01/33/1079
Nanomaterials for advanced applications. - In: 1st Algerian-German International Conference on New Technologies and their Impact on Society, (2008), S. 19
Furan-bridged fullerenes - a new class of organic semiconductors?. - In: 72nd annual meeting and DPG spring meeting of the Condensed Matter Section and the divisions: Physics Education, History of Physics, Radiation and Medical Physics as well as the working groups: Equal Opportunities, Industry and Business, Information, Physics and Disarmament, Physics of Socio-Economic Systems, Young DPG, 2008, CPP 6.6
ChemInform abstract: Monocyclopropanated fullerene dimer C 120 O and its application in a bulk heterojunction solar cell. - In: ChemInform, ISSN 1522-2667, Bd. 39 (2008), 46, insges. 1 S.
http://dx.doi.org/10.1002/chin.200846228
Radiation damage of isotactic polypropylene composites with multi-walled carbon nanotubes. - In: Functional materials, ISSN 1027-5495, Bd. 15 (2008), 2, S. 169-174
Preparation and characterization of the dimeric C70 fullerene oxide C140O. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 16 (2008), 4, S. 258-271
http://dx.doi.org/10.1080/15363830802171735
Anti-oxidant properties of C60 fullerenes in vitro. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 16 (2008), 5/6, S. 698-705
http://dx.doi.org/10.1080/15363830802317148
Photostimulated processes in PVK-C60 nanocomposites. - In: Molecular crystals and liquid crystals, ISSN 1563-5287, Bd. 497.2008, 1, S. 84/[416]-92/[424]
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Electrical and thermal conductivity of polymer-nanocarbon composites. - In: Molecular crystals and liquid crystals, ISSN 1563-5287, Bd. 497.2008, 1, S. 65/[397]-75/[407]
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Effect of ultrasound treatment on the optical properties of C 60 fullerene films. - In: Chemical physics letters, Bd. 467 (2008), 1/3, S. 77-79
http://dx.doi.org/10.1016/j.cplett.2008.10.074
Effects of photoexcited fullerene C60-composites in normal and transformed cells. - In: Medicinal chemistry and pharmacological potential of fullerenes and carbon nanotubes, (2008), S. 123-137
Diazoalkane addition reaction on the fullerene dimer C120O and characterization of the resulting mono-adduct. - In: Carbon, ISSN 0974-0546, Bd. 1 (2008), 1, S. 9-12
http://www.applied-science-innovations.com/cst-web-site/cst-vol1-issue1/CST-3.pdf
Oligomeric fullerene derivatives for photoactive layers of high supra-molecular order. - In: Proceedings TPE 08, (2008), Blatt 93-97
Mono-cyclopropanated fullerene dimer C120O and its application in a bulk heterojunction solar cell. - In: Chemistry letters, ISSN 1348-0715, Bd. 37 (2008), 7, S. 750-751
http://dx.doi.org/10.1246/cl.2008.750
The electronic state of fullerenes doped by oxygen. - In: Thin solid films, ISSN 1879-2731, Bd. 516 (2008), 21, S. 7937-7941
http://dx.doi.org/10.1016/j.tsf.2008.05.051
TRESR study of the photo-induced electron transfer in P3DDT/maleic anhydride blend in THF solution under UV flash photolysis. - In: Journal of molecular liquids, ISSN 1873-3166, Bd. 141 (2008), 1/2, S. 54-61
http://dx.doi.org/10.1016/j.molliq.2008.03.003
Therapeutic reactive oxygen generation. - In: Tumori journal, ISSN 2038-2529, Bd. 94 (2008), 2, S. 278-283
http://dx.doi.org/10.1700/346.4049
Transverse and longitudinal magnetoresistance in graphite intercalated by Co. - In: Physica, ISSN 1386-9477, Bd. 40 (2008), 7, S. 2630-2634
http://dx.doi.org/10.1016/j.physe.2007.09.121
Estimation of multi-walled carbon nanotubes toxicity in vitro. - In: Physica, ISSN 1386-9477, Bd. 40 (2008), 7, S. 2565-2569
http://dx.doi.org/10.1016/j.physe.2007.07.017
Radiation-induced modification of structure and one-electron elementary excitations of C60 fullerene films. - In: Materials science, ISSN 1392-1320, Bd. 14 (2008), 1, S. 3-7
Characterisation of multi-wall carbon nanotubes functionalised with carboxyl groups. - In: 71st annual meeting of the DPG and spring meeting of the Condensed Matter Division and the sections: Biological Physics, Environmental Physics, Extraterrestrial Physics, History of Physics, Physics Education, Radiation and Medical Physics as well as the working groups: Energy Matters, Equal Opportunities, Industry and Economy, Information, Physics and Disarmament, Physics of Socio-Economic Systems, 2007, O 44.23
Computer simulation of the electron beam irradiation effect on the modification of carbon nanotubes. - In: Hydrogen materials science and chemistry of carbon nanomaterials, ISBN 978-1-402-05512-6, (2007), S. 119-125
Raman scattering on the irradiated single-walled carbon nanotubes. - In: Physics, chemistry and application of nanostructures, ISBN 978-981-270-599-0, (2007), S. 249-253
Resistance of a nanocarbon material containing nanotubes. - In: Molecular crystals and liquid crystals, ISSN 1563-5287, Bd. 468.2007, 1, S. 289/[641]-297/[649]
http://dx.doi.org/10.1080/15421400701231582
Biological effects of C60 fullerenes in vitro and in a model system. - In: Molecular crystals and liquid crystals, ISSN 1563-5287, Bd. 468.2007, 1, S. 265/[617]-274/[626]
http://dx.doi.org/10.1080/15421400701230105
Radiation damage and Raman vibrational modes of single-walled carbon nanotubes. - In: Chemical physics letters, Bd. 447 (2007), 4/6, S. 252-256
http://dx.doi.org/10.1016/j.cplett.2007.09.010
Study of C60 fullerenes and C60-containing composites cytotoxicity in vitro. - In: Materials science & engineering, ISSN 1873-0191, Bd. 27 (2007), 5/8, S. 1121-1124
http://dx.doi.org/10.1016/j.msec.2006.07.009
Electromagnetic losses in carbon-epoxy composites. - In: Materials science & engineering, ISSN 1873-0191, Bd. 27 (2007), 5/8, S. 1007-1009
http://dx.doi.org/10.1016/j.msec.2006.06.017
Monte Carlo simulation of intercalated carbon nanotubes. - In: Journal of molecular modeling, ISSN 0948-5023, Bd. 13 (2007), 1, S. 283-287
http://dx.doi.org/10.1007/s00894-006-0129-8
Transport properties of carbon nanotube-metal nanocomposites. - In: Physica, ISSN 1386-9477, Bd. 37 (2007), 1/2, S. 78-80
http://dx.doi.org/10.1016/j.physe.2006.06.007
Models of light-emitting self-assembled donor-acceptor pairs in macromolecules from short multi-walled carbon nanotubes and bio-, organic polymers. - In: 2nd International Symposium Technologies for Polymer Electronics - TPE 06, (2006), Blatt 186-189
Polymer solar cells based on new low bandgap polymers and new derivates of fullerene. - In: 2nd International Symposium Technologies for Polymer Electronics - TPE 06, (2006), Blatt 77
Synthesis of new soluble C60 and C70 derivatives for use in organic solar cells. - In: 2nd International Symposium Technologies for Polymer Electronics - TPE 06, (2006), Blatt 33-35
Carbon nanomaterials for photovoltaic applications. - In: 2nd International Symposium Technologies for Polymer Electronics - TPE 06, (2006), Blatt 1-2
UV induced ds(ss)-DNA damage: optical and electrical recognition. - In: Cell biology and instrumentation: UV radiation, nitric oxide and cell death in plants, (2006), S. 109-121
Radiative recombination of Frenkel excitons in solid C60 under radiation damages. - In: Molecular crystals and liquid crystals, ISSN 1563-5287, Bd. 426 (2006), 1, S. 187-194
http://dx.doi.org/10.1080/15421400590891083
Vlijanie oblučennych vidimym svetom fullerensoderžaščich kompozitov na generirovanie radikalьnych form kisloroda i žiznesposobnostь opucholevych kletok :
Effect of the visible light irradiation of fullerene-containing composites on the ROS generation and the viability of tumor cells. - In: Experimental oncology, ISSN 1812-9269, Bd. 28 (2006), 2, S. 160-162
Ausgewählte Beiträge zur Chemie und Physik früher Mitglieder der Erfurter Akademie Gemeinnütziger Wissenschaften anhand von Experimenten. - In: Convivium academicum, (2006), S. 83-105
Synthesis of three-dimensional C60 micro-flowers: a scanning electron microscopy study. - In: Materials letters, ISSN 1873-4979, Bd. 60 (2006), 17/18, S. 2278-2281
http://dx.doi.org/10.1016/j.matlet.2005.12.145
Ultrasound induced growth of C60 fullerites over KBr. - In: Materials letters, ISSN 1873-4979, Bd. 60 (2006), 25/26, S. 3156-3159
http://dx.doi.org/10.1016/j.matlet.2006.02.082
Radiation damage to multi-walled carbon nanotubes and their Raman vibrational modes. - In: Carbon, ISSN 1873-3891, Bd. 44 (2006), 13, S. 2694-2700
http://dx.doi.org/10.1016/j.carbon.2006.04.010
Dose dependences of the optical properties of fullerene films subjected to the electron irradiation. - In: Thin solid films, ISSN 1879-2731, Bd. 495 (2006), 1/2, S. 365-367
http://dx.doi.org/10.1016/j.tsf.2005.08.237
Equation of state for C60 fullerene aqueous solutions. - In: International journal of thermophysics, ISSN 1572-9567, Bd. 26 (2005), 3, S. 795-805
http://dx.doi.org/10.1007/s10765-005-5578-2
Carbon nanotube peapods - insertion of C60 into multi-wall carbon nanotubes. - In: Karbo, ISSN 1230-0446, Bd. 50 (2005), 4, S. 224-227
Synthesis of diamond by electron irradiation of C60 intercalated graphite. - In: Materials letters, ISSN 1873-4979, Bd. 59 (2005), 26, S. 3259-3261
http://dx.doi.org/10.1016/j.matlet.2005.04.058
Characterization of water-soluble fullerene C60 oxygen and hydroxyl group derivatives for photosensitizers. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 13.2005, Suppl. 1, S. 497-509
http://dx.doi.org/10.1081/FST-200039472
C60 intercalated graphite: a new form of carbon. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 13.2005, Suppl. 1, S. 427-430
http://dx.doi.org/10.1081/FST-200039421
Fragmentation of free and supported C60 fullerenes by ion beam. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 13.2005, Suppl. 1, S. 339-346
http://dx.doi.org/10.1081/FST-200039342
Fluid dynamics in subnanometer channels of carbon nanotubes. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 13.2005, Suppl. 1, S. 287-291
http://dx.doi.org/10.1081/FST-200039308
Transport properties of composites with carbon nanotube-based composites. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 13.2005, Suppl. 1, S. 259-265
http://dx.doi.org/10.1081/FST-200039294
Electronic structure of C60, CuPc, and C60/CuPc nanoparticles and their layers. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 13 (2005), 3, S. 259-272
http://dx.doi.org/10.1081/FST-200056252
Am Anfang war der Kohlefaden - Was haben wir heute vom Kohlenstoff zu erwarten?. - In: Lux junior 2005, (2005), insges. 14 S.
The influence of the optoelectronic properties of poly(3-alkylthiophenes) on the device parameters in flexible polymer solar cells. - In: Organic electronics, Bd. 6 (2005), 2, S. 65-77
http://dx.doi.org/10.1016/j.orgel.2005.02.004
Katalitičeskaja sistema radikalьnych form kisloroda na osnove fullerenov S60 :
Catalytic system of the reactive oxygen species on the C60 fullerene basis. - In: Experimental oncology, ISSN 1812-9269, Bd. 26 (2004), 4, S. 326-327
Im Titel ist "60" tiefgestellt
Nanostructure and electronic spectra of Cu-C60 films. - In: Hydrogen materials science and chemistry of carbon nanomaterials, (2004), S. 333-338
Radiating damages and optical properties of solid C60 films with copper. - In: Metallofizika i novejšie technologii, ISSN 1024-1809, Bd. 26 (2004), 8, S. 1051-1061
Synthesis of C60 intercalated graphite. - In: Solid state communications, ISSN 1879-2766, Bd. 131 (2004), 3/4, S. 153-155
http://dx.doi.org/10.1016/j.ssc.2004.05.018
Structure and photoluminescence of single-emulsion C60 and Cu-C60 films. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 12 (2004), 1/2, S. 311-317
http://dx.doi.org/10.1081/FST-120027185
Computer simulation of C60 fullerene fragmentation by electron beam. - In: Fullerenes, nanotubes & carbon nanostructures, ISSN 1536-4046, Bd. 12 (2004), 1/2, S. 437-442
http://dx.doi.org/10.1081/FST-120027204
Structure of C60 fullerene in water: spectroscopic data. - In: Carbon, ISSN 1873-3891, Bd. 42 (2004), 5/6, S. 1203-1206
http://dx.doi.org/10.1016/j.carbon.2003.12.053
Effect of X-Ray and UV irradiation of the C60 fullerene aqueous solution on biological samples. - In: Carbon, ISSN 1873-3891, Bd. 42 (2004), 5/6, S. 1199-1201
http://dx.doi.org/10.1016/j.carbon.2003.12.055
Computer simulation of supported C60 fullerenes fragmentation by particle beam. - In: Carbon, ISSN 1873-3891, Bd. 42 (2004), 5/6, S. 987-990
http://dx.doi.org/10.1016/j.carbon.2003.12.013
Investigation on preparation of multiwalled carbon nanotubes by DC arc discharge under N2 atmosphere. - In: Carbon, ISSN 1873-3891, Bd. 42 (2004), 5/6, S. 931-939
http://dx.doi.org/10.1016/j.carbon.2003.12.060
Raman spectra and structure of thin CuC60 films. - In: Thin solid films, ISSN 1879-2731, Bd. 459 (2004), 1/2, S. 254-257
http://dx.doi.org/10.1016/j.tsf.2003.12.144
Nanosystems of polymerized fullerenes and carbon nanotubes. - In: Frontiers of multifunctional integrated nanosystems, (2004), S. 153-166
Novel carbon materials obtained by reactions of C60 fullerene with phosphorus at high temperature. - In: Journal of non-crystalline solids, ISSN 0022-3093, Bd. 333 (2004), 3, S. 301-306
http://dx.doi.org/10.1016/j.jnoncrysol.2003.12.056
Insertion of C60 into multi-wall carbon nanotubes : a synthesis of C60MWCNT. - In: Carbon, ISSN 1873-3891, Bd. 42 (2004), 12/13, S. 2759-2762
http://dx.doi.org/10.1016/j.carbon.2004.05.025
Microporous zeolite membranes - a useful tool for gas sensing systems. - In: Frontiers of multifunctional integrated nanosystems, (2004), S. 423-430
DNA, DNA/metal nanoparticles, DNA/nanocarbon and macrocyclic metal complex/fullerene molecular building blocks for nanosystems : electronics and sensing. - In: Frontiers of multifunctional integrated nanosystems, (2004), S. 251-276
Synthesis and characterization of C60- and C70 polymer phases. - In: Frontiers of multifunctional integrated nanosystems, (2004), S. 167-170
Calculation of the density profile of liquid located in the multi-walled carbon nanotube. - In: Frontiers of multifunctional integrated nanosystems, (2004), S. 23-30
Irradiation effect on the electron transport properties of single-walled carbon nanotube. - In: Frontiers of multifunctional integrated nanosystems, (2004), S. 19-22
Frontiers of multifunctional integrated nanosystems : [proceedings of the NATO Advanced Research Workshop on Frontiers of Multifunctional Integrated Nanosystems, Ilmenau, Germany, 12 - 16 July 2003]. - Dordrecht [u.a.] : Kluwer Acad. Publ., 2004. - XII, 482 S. - (NATO science series) ISBN 1-4020-2171-2
Literaturangaben
Immobilization of hydroxyapatite, C60 nanocrystals by DNA molecules and a formation of nanoblocks for implant surfaces. - In: Biomaterialien, ISSN 2191-4672, Bd. 4 (2003), 2, S. 130
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Conductivity of metal - linear carbon chains with metal inclusions - metal structures. - In: Physics, chemistry and application of nanostructures, (2003), S. 190-193
Thermodynamic properties of C-60 fullerene water solution. - In: High pressure research, ISSN 1477-2299, Bd. 23 (2003), 3, S. 271-273
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Selbstorganisation - Ordnung aus dem Chaos : vorgetragen auf der Sitzung vom 22. März 2002 ; (Kurzfassung). - In: Jahrbuch, ISSN 1618-8411, 2002 (2003), S. 37-38
Fullerenes and carbon-nanotubes for technical applications. - In: Karbo, ISSN 1230-0446, Bd. 48 (2003), 4, S. 195-201
Effect of UV irradiation of fullerene-containing composite in biological samples. - In: Functional materials, ISSN 1027-5495, Bd. 10 (2003), 3, S. 525-527
Abstract engl. und russ.
Room temperature electrochemical opening of carbon nanotubes followed by hydrogen storage advanced materials. - In: Advanced materials, ISSN 1521-4095, Bd. 15 (2003), 1, S. 55-57
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Distribution of the superfluid density of 4He inside a carbon nanotube. - In: Journal of molecular liquids, ISSN 1873-3166, Bd. 105 (2003), 2/3, S. 255-259
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Equation of state for C60 toluene solution. - In: Journal of molecular liquids, ISSN 1873-3166, Bd. 105 (2003), 2/3, S. 149-155
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Fullerenes immobilized at silica surface: topology, structure and bioactivity. - In: Journal of molecular liquids, ISSN 1873-3166, Bd. 105 (2003), 2/3, S. 141-147
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Biophysical studies of fullerene-based composite for bio-nanotechnology. - In: Materials science & engineering, ISSN 1873-0191, Bd. 23 (2003), 1/2, S. 109-111
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Preparation of multiwalled carbon nanotubes by DC arc discharge under a nitrogen atmosphere. - In: Carbon, ISSN 1873-3891, Bd. 41 (2003), 8, S. 1648-1651
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Synthesized carbon nanotubes for experiments with C 60. - In: Proceedings and our portrait, (2003), insges. 1 S.
Herstellung, Trennung und Charakterisierung endohedraler Fullerene. - In: Proceedings and our portrait, (2003), insges. 2 S.
Synthesis and characterisation of C 60-polymers and their intercalation into carbon nanotubes. - In: Proceedings and our portrait, (2003), insges. 3 S.
Novel forms of carbon: structures, properties and applications. - In: ChemInform, ISSN 1522-2667, Bd. 33 (2002), 50, S. 237
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Structural peculiarities and Raman vibrational modes in the C 60 films. - In: Molecular crystals and liquid crystals science and technology, Bd. 385 (2002), 1, S. 43-49
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Computer simulation of the irradiation effect on the modification of carbon nanostructures. - In: AIP conference proceedings, ISSN 1551-7616, Bd. 633 (2002), S. 390-393
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DNA nanotechnology of carbon nanotube cells: physico-chemical models of self-organization and properties. - In: Materials science & engineering, ISSN 1873-0191, Bd. 19 (2002), 1/2, S. 41-45
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Infrared spectrum of fullerene C60 aggregates in water solution. - In: Frontiers of multifunctional nanosystems, (2002), S. 287-290
Fundamental properties and applications of fullerene and carbon nanotube systems. - In: Frontiers of multifunctional nanosystems, (2002), S. 213-224
Nanotechnology of DNA/nano - Si and DNA/carbon nanotubes/nano - Si chips. - In: Frontiers of multifunctional nanosystems, (2002), S. 191-212
Zeolithische Filter und Membranen in der Gassensorik, 2002. - Online-Ressource (PDF-Datei: 160 S., 27,9 MB) : Ilmenau, Techn. Univ., Diss., 2002
Parallel als Druckausg. erschienen
Metalloxid-Gassensoren werden heute in großen Stückzahlen zur Detektion brennbarer und toxischer Gase in vielen Bereichen der Industrie und des täglichen Lebens eingesetzt. Die in den Sensoren verwendeten gassensitiven Metalloxid-Schichten sind jedoch fast ausnahmslos gegenüber mehreren Gasen empfindlich, wodurch Anzeigen verfälscht und sogar Fehlalarme ausgelöst werden können. Ursache dafür sind ähnliche Wechselwirkungen verschiedener Gase mit der Metalloxid-Oberfläche. In der vorliegenden Dissertation wird durch den Einsatz zeolithischer Filter und Membranen eine Verminderung der Querempfindlichkeit kommerzieller Methan-Gassensoren gegenüber Ethanol erreicht. Diese auf der Basis sensitiver Zinndioxid-Schichten wirkenden Sensoren werden vor allem in Gaswarnanlagen (Bergbau, Industrie, Haushalt) eingesetzt. Zeolithe (z. B. ZSM-5, Zeolith-A) weisen ausgezeichnete katalytische Eigenschaften und eine hohe thermische und chemische Beständigkeit auf. Sie sind daher besonders geeignet, um als aktive Filter vor den gassensitiven Schichten von Gassensoren verwendet zu werden. Kristalline Zeolith-Pulver werden in der Arbeit als Endprodukte einer Serie von Hydrothermalsynthesen erhalten. Anschließend wurden die Kristalle durch Ionenaustausch teilweise modifiziert. Für die Verwendung von Zeolithen als Filtermaterial in Gassensoren ist es jedoch technologisch sinnvoller trägergestützte Zeolith-Membranen einzusetzen. Durch eine neue Variante der in-situ-Synthese von Zeolith-Schichten auf porösen Trägern aus Aluminiumoxid- und Titandioxid-Substraten konnten die Membranen defektfrei hergestellt und ebenfalls durch Ionenaustausch weiter modifiziert werden. Zeolith-Pulver und -Membranen wurden in zahlreichen Untersuchungen strukturell charakterisiert. Ihre katalytischen Eigenschaften wurden anhand der Konversion von Ethanol an sauren Zeolithen umfassend getestet und dokumentiert. Mit Hilfe von Permeationsmessungen wurde die Eignung der erzeugten zeolithischen Membranen zur Trennung von Gasspezies bestätigt. Die modifizierten Zeolithe und zeolithischen Membranen bewährten sich in Sensoruntersuchungen als aktive Filter bei der selektiven Detektion von Methan in verschiedenen Methan-Ethanol-Gasgemischen.
http://www.db-thueringen.de/servlets/DocumentServlet?id=1170
Frontiers of multifunctional nanosystems : [proceedings of the NATO Advanced Research Workshop on Frontiers in Molecular-Scale Science and Technology of Fullerene, Nanotube, Nanosilicon, Biolpolymer (DNA, Protein) Multifunctional Nanosystems ; Kyiv, Ukraine, 9 - 12 September 2001]. - Dordrecht [u.a.] : Kluwer Academic Publishers, 2002. - XI, 485 S.. - (Nato Science Series ; 57) ISBN 1-4020-0560-1
Includes index
Electronic properties of DNA/CNT chip on Si. - In: Molecular crystals and liquid crystals science and technology, Bd. 361 (2001), 1, S. 237-244
http://dx.doi.org/10.1080/10587250108025744
Magnetic carbon. - In: Nature. - London [u.a.] : Nature Publ. Group, 1869- , ISSN: 1476-4687 , ZDB-ID: 1413423-8, ISSN 1476-4687, Bd. 413 (2001), 6857, S. 716-718
Corrigendum, Bd. 436.2005, 7054, S. 1200
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