I. Brekotkin, N. Fatkullin, K. Lindt, C. Mattea, S. Stapf On the theory of the spin I=1/2 double quantum NMR: effects of spin spatial displaces between RF pulses J. Chem. Phys. 157, 224108/1-7 (2022)
B. Gizatullin, C. Mattea, S. Stapf Three mechanisms of Room Temperature Dynamic Nuclear Polarization occur simultaneously in an Ionic Liquid Phys. Chem. Chem. Phys. 24, 27004-27008 (2022)
B. Gizatullin, C. Mattea, I. Shikhov, C. Arns, S. Stapf Modelling molecular interactions with wetting and non-wetting rock surfaces by combining Electron Paramagnetic Resonance and NMR relaxometry Langmuir 38, 11033 (2022)
K. Lindt, C. Mattea, S. Stapf, I.K. Ostrovskaya, N.F. Fatkullin The deuteron NMR Hahn echo decay in polyethylene oxide melts AIP Advances 12, 075219 (2022)
Y. Cao, Y. Wu, X. Tang, Q. Xu, S. Stapf, C. Mattea, W. Li Long-term efficiency for reducing entanglements of nascent polyethylene by a polystyrene modified Ziegler-Natta catalyst J. Appl. Polymer Sci., 51790 (2021)
K. Lindt, B. Gizatullin, C. Mattea, S. Stapf Non-exponential 1H and 2H NMR relaxation and self-diffusion in asphaltene-maltene solutions Molecules, 26, 05218 (2021)
A. Cretu, C. Mattea, S. Stapf, Low-field and variable-field NMR relaxation studies of H2O and D2O molecular dynamics in articular cartilage PLOS ONE, 16, 0256177 (2021)
Y. Wu, H. Yang, W. Li, C. Mattea, S. Stapf, L. Zhang, C. Ye, X. Ye Tailored Crystalline Order of Nascent Polyethylene from Metallocene Supported on Confined Polystyrene Catalysis Today, 368, 272-280 (2021)
B. Gizatullin, M. Gafurov, F. Murzakhanov, A. Vakhin, C. Mattea, S. Stapf Molecular dynamics and proton hyperpolarization via synthetic and crude oil porphyrin complexes in solid and solution state Langmuir, 37, 6783-6791 (2021)
B. Gizatullin, C. Mattea, S. Stapf Molecular Dynamics in Ionic Liquid/Radical Systems J. Phys. Chem. B, 125, 4850-4862 (2021)
B. Gizatullin, E. Papmahl, C. Mattea, S. Stapf Quantifying crude oil contamination in sand and soil by EPR spectroscopy Appl. Magn. Regson., 52, 633-648 (2021)
B. Gizatullin, C. Mattea, S. Stapf Field-cycling NMR and DNP - A friendship withe benefits Journal of Magnetic Resonance, 322, 106851 (2021)
I. K. Ostrovskaya, N. F. Fatkullin, T. Körber, E. A. Rössler, A. Lozovoi, C. Mattea, S. Stapf On the theory of deuteron NMR Free Induction Decay of reptating polymer chains: Effect of end segment dynamics J. Chem. Phys., 152, 184904 (2020)
A. Cretu, C. Mattea, S. Stapf, I. Ardelean The Effect of Silica Fume and Organosilane Addition on the Porosity of Cement Paste Molecules, 25, 1762/1-9 (2020)
S. Ghoshal, C. Mattea, P. Denner, S. Stapf Effect of Initial Conformation on the Starch Biopolymer Film Formation Studied by NMR Molecules, 25, 1227/1-17 (2020)
J. Poonoosamy, S. Haber-Pohlmeier, H. Deng, G. Deissmann, M. Klinkenberg, B. Gizatullin, S. Stapf , F. Brandt, D. Bosbach, A. Pohlmeier Combination of MRI and SEM to assess changes in chemical properties and permeability of porous media due to barite precipitation Minerals, 10, 226/1-20 (2020)
J. Stepisnik, C. Mattea, S. Stapf, A. Mohoric Molecular velocity auto-correlations in glycerol/water mixtures studied by NMR MGSE method Physica A, 553, 124171 (2020)
Y. Wu, H. Yang, W. Li, C. Mattea, S. Stapf, L. Zhang, C. Ye, X. Ye Tailored Crystalline Order of Nascent Polyethylene from Metallocene Supported on Confined Polystyrene Catalysis Today, 368, 272-280 (2021)
B. Gizatullin, M. Gafurov, A. Vakhin, A. Rodionov, G. Mamin, S. Orlinskii, C. Mattea, S. Stapf Native Vanadyl Complexes in Crude Oil as Polarizing Agents for In-situ Proton Dynamic Nuclear Polarization Energy & Fuels, 33, 10923-10932 (2019)
B. Gizatullin, C. Mattea, S. Stapf Hyperpolarization by DNP and Molecular Dynamics: Eliminating the Radical Contribution in NMR Relaxation Studies J. Phys. Chem. B, 46, 9963-9970 (2019)
B. Gizatullin, C. Mattea, S. Stapf X-nuclei Hyperpolarization for Studying Molecular Dynamics by DNP-FFC J. Magn. Reson, 307, 106583/1-10 (2019)
A. Ordikhani Seyedlar, S. Stapf, C. Mattea Nuclear Magnetic Relaxation and Diffusion Study of the Ionic Liquids 1‐ethyl‐ and 1‐butyl‐3‐methylimidazolium bis (trifluoromethylsulphonyl)imide Confined in Porous Glass Magn. Reson. Chem., 57 , 818-828 (2019)
B. Phani Kumar, S. Stapf, C. Mattea Molecular Dynamics in the Lyophases of Copolymer P123 Investigated with FFC NMR Relaxometry Langmuir, 35, 435-445 (2019)
O.V. Petrov, S. Stapf Multi-component analysis of T1 relaxation in bovine articular cartilage at low magnetic fields Magn. Reson. Med., 81, 2158-2168 (2019)
C. Mattea, B. Gizatullin, S. Stapf Dynamics of ionic liquids in poly(vinyl alcohol) porous scaffold. Low field NMR study Magn. Reson. Imaging, 56, 126-130 (2019)
I. Shikhov, A. Rawal, B. Gizatullin, C. Arns, D. Thomas, J. Hook, S. Stapf, Y. Yao Application of low-field, 1H/13C high-field solution and solid state NMR for characterisation of oil fractions responsible for wettability change in sandstones Magn. Reson. Imaging, 56, 77-85 (2019)
B. Gizatullin, C. Mattea, S. Stapf Overhauser DNP FFC study of block copolymer diluted solution Magn. Reson. Imaging, 56, 96-102 (2019)
B. Gizatullin, I. Shikhov, C. Arns, C. Mattea, S. Stapf On the influence of wetting behavior on relaxation of adsorbed liquids – a combined NMR, EPR and DNP study of aged rocks Magn. Reson. Imaging, 56, 63-69 (2019)
A. Cretu, C. Mattea, S. Stapf, I. Ardelean The effect of silica nanoparticles on the pore structure of hydrating cement paste: a spatially resolved low-field NMR study Molecular Physics, 117, 1006-1014 (2019)
C. Cadar, A. Cretu, M. Moldovan, C. Mattea, S. Stapf, I. Ardelean NMR T1–T2 correlation analysis of molecular absorption inside a hardened cement paste containing silanised silica fume Molecular Physics, 117, 1000-1005 (2019)
A. Lozovoi, C. Mattea, N. Fatkullin, S. Stapf Segmental dynamics of entangled polyethylene oxide melts: deviations from the tube-reptation model Macromolecules 51, 10055–10064 (2018)
L. Wei, Y. Zhen, A. Lozovoi, O. Petrov, C. Mattea, S. Stapf Heterogeneous Distribution of Chain Mobility in Nascent UHMWPE in the Weakly Entangled State J. Polym. Res. 25, 239 (2018)
B. Gizatullin, M. Gafurov, A. Rodionov, G. Mamin, C. Mattea, S. Stapf, S. Orlinskii Proton-radical interaction in crude oil – a combined NMR and EPR study Energy & Fuels, 32, 11261–11268 (2018)
T. Überrück, O. Neudert, K.-D. Kreuer, B. Blümich, J. Granwehr, S. Stapf, S. Han Effect of nitroxide spin probeson the transport properties of Nafion membranes Phys. Chem. Chem. Phys.20, 26660-26674 (2018)
J. Stepisnik, C. Mattea, S. Stapf, A. Mohoric Molecular velocity auto-correlation of simple liquids observed by NMR MGSE method Eur. Phys. J. B, 91, 293 (1-9) (2018)
C. Fraenza, C. Mattea, G. Farrher, A. Ordikhani-Seyedlar, S. Stapf, E. Anoardo Rouse dynamics in PEO-PPO-PEO block-copolymers in aqueous solution as observed through fast field-cycling NMR relaxometry Polymer, 150, 244-253 (2018)
B. Zhou, Z. Liao, C. Mattea, S. Stapf, H. Jiao, Z. Zhuang, B. Jiang, J. Wang, Y. Yang Solvents molecular mobility in coked catalyst ZSM-5 studied by NMR relaxation and Pulsed Field Gradient techniques Ind. Eng. Chem. Res. 57, 6647-6653 (2018)
Q. Zhou, J. Zhang, W. Li, O. Petrov, C. Mattea, S. Stapf Improved miscibility of PA6 and chitosan by the electric-field assisted phase inversion Carbohydrate Polymers 189, 15-21 (2018)
C. Mattea, A. Ordikhani-Seyedlar, P. de Almeida Silva, S. Stapf Molecular transport in ionic liquids under confinement studied by low field NMR Microporous Mesoporous Mater., 269, 171-174 (2018)
O.V. Petrov, E. Rössler, C. Mattea, M.T. Nieminen, P. Lehenkari, S. Karhula, S. Saarakkala, S. Stapf Low-Field NMR Relaxation Times Distributions and Their Magnetic Field Dependence as a Possible Biomarker in Cartilage IFMBE Proceedings, 65, 952-955 (2018)
A. Ordikhani-Seyedlar, J. P. de Almeida Martins, P. J. Sebastião, M.J. Jardim Beira, S. Stapf, F. Vaca Chavez, C. Mattea Dynamics of binary mixtures of ionic liquids and ethanol by NMR Magn. Reson. Chem., 56, 108-112 (2018)
O. Neudert, C. Mattea, S. Stapf Application of CPMG acquisition in fast field-cycling relaxometry Microporous Mesoporous Mater., 269, 103-108 (2018)
E. Rößler, C. Mattea, S. Stapf, S. Karhula, S. Saarakkala, M. T. Nieminen Load-dependent NMR low-field profiling and relaxation dispersion study of osteoarthritic articular cartilage Microporous Mesoporous Mater., 269, 160-165 (2018)
A. Lozovoi, L. Petrova, C. Mattea, S. Stapf, E. Rössler, N. Fatkullin On the theory of the proton dipolar-correlation effect as a method for investigation of segmental displacement in polymer melts J. Chem. Phys., 147, 074904/1-9 (2017)
B. Gizatullin, O. Neudert, S. Stapf, C. Mattea Dynamic nuclear polarization fast field cycling method for selective study of molecular dynamics in block copolymers Chem. Phys. Chem., 18, 2347-2356 (2017)
A. Lozovoi, C. Mattea, M. Hofmann, K. Saalwächter, N. Fatkullin, S. Stapf Segmental dynamics of polyethylene-alt-propylene studied by NMR spin echo techniques J. Chem. Phys., 146, 224901 (2017)
A. Ordikhani-Seyedlar, S. Stapf, C. Mattea Cation dynamics in supercooled and solid alkyl methylimidazolium bromide ionic liquids J. Phys. Chem. B, 121, 5363-5373 (2017)
O.V. Petrov, S. Stapf Parameterization of NMR relaxation curves in terms of logarithmic moments of the relaxation time distribution J. Magn. Reson. 279, 39-48 (2017)
E. Rößler, C. Mattea, S. Saarakkala, P. Lehenkari, M. Finnilä, L. Rieppo, S. Karhula, M.T. Nieminen, S. Stapf Correlations of low-field NMR and variable-field NMR parameters with osteoarthritis in human articular cartilage under load NMR in Biomedicine 30, 1-14 (2017).
B. V. N. Phani Kumar, C. Mattea, S. Stapf & R. Dabrowski Influence of underlying local organisations in typical nematic phase of 6CHBT and induced nematic phase of bicomponent liquid crystalline systems 4DBT–12CB – a Fast Field Cycling NMR investigation Liquid Crystals, 44, 1494-1505 (2017)
O. Neudert, C. Mattea, S. Stapf Molecular dynamics-based selectivity for Fast-Field-Cycling relaxometry by Overhauser and solid effect dynamic nuclear polarization J. Magn. Reson. 276, 113 (2017)
C. Lenk, C. Mattea, S. Stapf, J. M. Köhler Optimising sodium silica gel for Ferroin immobilization J. Porous Mater., 24, 923 (2017)
J. Sun, M. Chen, H. Wang, B. Jiang, C. Mattea, S. Stapf, J. Wang, Z. Liao, Y. Yang PFG-NMR measurement of self-diffusion coefficients of long-chain alpha-olefins and their mixture in semicrystalline polyethylene J. Appl. Polym. Sci. 133, 1-8 (2016)
O. Neudert, C. Mattea, S. Stapf A compact X-Band resonator for DNP-enhanced Fast-Field-Cycling NMR J Magn. Reson. 271, 7 (2016)
E. Silletta, M. Velasco, C. Gomez, M. Strumia, S. Stapf, C. Mattea, G. Monti, R. Acosta Enhanced surface interaction of water confined in hierarchical porous polymers induced by hydrogen bonding Langmuir 32, 7427 (2016)
A. Lozovoi, C. Mattea, A. Herrmann, E. Roßler, S. Stapf, N. Fatkullin Proton NMR dipolar-correlation effect as a method for investigating segmental diffusion in polymer melts J. Chem. Phys. (Communication) 144, 241101 (2016)
A. Ordikhani-Seyedlar, O. Neudert, S. Stapf, C. Mattea, R. Kausik, D. E. Freed, Y.-Q. Song, M. D. Hürlimann Evidence of aromaticity-specific maltene NMR relaxation enhancement promoted by semi-immobilised radicals Energy & Fuels 30, 3886-3893 (2016)
Y. Gossuin, T. Orlando, M. Basini, D. Henrard, A. Lascialfari, C. Mattea, S. Stapf, Q. Vuong NMR relaxation induced by iron oxide particles: testing theoretical models Nanotechnology 27, 155706/1-11 (2016)
F. Bajd, C. Mattea, S. Stapf, I. Sersa Diffussion tensor MR microscopy of tissues with low diffusional snisotropy Radiology & Oncology, 50, 175 (2016)
M. Velasco, E. Silletta, C. Gomez, M. Strumia, S. Stapf, G. Monti, C. Mattea, and R. Acosta Spatially Resolved Monitoring of Drying of Hierarchical Porous Organic Networks Langmuir 32, 2067-2074 (2016).
M. Bukharov, V. Shtyrlin, G. Mamin, S. Stapf, C. Mattea, A. Mukhtarov, N. Serov, E. Gilyazetdinov Structure and Dynamics of Solvation Shells of Copper(II) Complexes with N,O-Containing Ligands Inorg. Chem., 54, 9777 (2015)
Q. Zhang, J. Wang, B. Jiang, Y. Yang, Y. Zhou, S. Stapf, C. Mattea, Q. Gong Particle motion in two- and three-phase fluidized bed reactors determined by PFG NMR Chem. Eng. Technol. 38, 1269-1276 (2015)
M. Chen, B. Jiang, J. Wang, Y. Yang, S. Stapf, C. Mattea, Q. Gong Investigation of the extraction process in gel-spinning technology of UHMWPE fibers by low-field NMR J. Appl. Poly. Sci., 132, 42018 (2015)
A. Ordikhani-Seyedlar, S. Stapf, C. Mattea Dynamics of the Ionic Liquid 1-Butyl-3-Methylimidazolium Bis(Trifluoromethylsulphonyl)imide studied by Nuclear Magnetic Resonance Dispersion and Diffusion Phys. Chem. Chem. Phys., 17, 1653 (2015)
E. Rössler, C. Mattea, S. Stapf Feasibility of high-resolution one-dimensional relaxation imaging at low magnetic field using a single-sided NMR scanner applied to articular cartilage J. Magn. Reson., 251, 43 (2015)
M. Contreras, C. Mattea, J. Rueda, S. Stapf, F. Bajd Synthesis and Characterization of Block Copolymers from 2-Oxazolines Designed Monomers and Polymers, 18, 170-179 (2015)
S. Stapf, A. Ordikhani-Seyedlar, C. Mattea, R. Kausik, D. E. Freed, Y.-Q. Song, M. D. Hürlimann Fluorine tracers for the identification of molecular interaction with porous asphaltene aggregates in crude oil Microporous Mesoporous Mater., 205, 56-60 (2015)
O. Neudert, C. Mattea, S. Stapf, M. Reh, H.W. Spieß, K. Münnemann Fast-Field-Cycling Relaxometry enhanced by Dynamic Nuclear Polarization Microporous Mesoporous Mater., 205, 70-74 (2015)
E. Rössler, C. Mattea, S. Stapf NMRD investigations of enzymatically degraded bovine articular cartilage Magn. Reson. Medicine, 73, 2005-2014 (2015)
S. Haber-Pohlmeier, S. Stapf, A. Pohlmeier NMR fast field cycling relaxometry of unsaturated soils Appl. Magn. Reson. 45, 1099-1115 (2014)
C. Badea, A. Pop, C. Mattea, S. Stapf, I. Ardelean The effect of curing temperature on early hydration of gray cement via fast field cycling-NMR relaxometry Appl. Magn. Reson., 45, 1299 (2014)
N. Fatkullin, S. Stapf, M. Hofmann, R. Meier, E.A. Rössler Proton spin dynamics in polymer melts: new perspectives for experimental investigations of polymer dynamics J. Non-Cryst. Solids, 407, 309 (2014)
J. Stepisnik, A. Mohoric, C. Mattea, S. Stapf and I. Sersa Velocity autocorrelation spectra in molten polymer measured by NMR modulated gradient spin-echo E. Phys. Lett., 106, 27007 (2014)
M. Bukharov, V. Shtyrlin, A.Mukhtarov, G. Mamin, S. Stapf, C. Mattea, A. Krutikov, A.N Il'in and N. Serov Structural and dynamic characteristics of copper(II) amino acid complexes in solutions by combined EPR and NMR relaxation methods Phys. Chem. Chem. Phys., 16, 9411 (2014)
S. Stapf , A. Ordikhani-Seyedlar , N. Ryan , C. Mattea , R. Kausik , D. Freed , Y.-Q. Song and M. Hurlimann Probing maltene-asphaltene interaction in crude oil by means of NMR relaxation Energy & Fuels, 28, 2395–2401 (2014)
O. Neudert, H.-P. Raich, C. Mattea, S. Stapf, K. Münnemann An Alderman-Grant resonator for S-Band Dynamic Nuclear Polarization J. Magn. Reson. 242, 79 (2014)
S. Ghoshal, S. Stapf and C. Mattea Protein renaturation in the gelatin film formation process Appl. Magn. Reson., 45, 145 (2014)
B. Jiang, Y. Yang, L. Du, C. Mattea, J. Wang, S. Stapf and Y. Yang Solvent diffusion in silica/poly[styrene-co-(acrylic acid)] core-shell microspheres by pulsed field gradient NMR techniques Journal of Applied Polymer Science, 131, 40160 (2014)
N. Fatkullin, C. Mattea, S. Stapf On the theory of Double Quantum NMR in polymer systems: the second cumulant approximation for many spin I=1/2 systems J. Chem. Phys. 139, 194905 (2013)
O. Neudert, C. Mattea, H. W. Spiess, S. Stapf, K. Münnemann Comparative study of 1H and 19F Overhauser DNP in fluorinated benzenes Physical Chemistry Chemical Physics,15, 20717 (2013)
E. Rössler, S. Stapf, N. Fatkullin Recent NMR investigations on molecular dynamics of polymer melts in bulk and in confinement Current Opinion in Colloid & Interface Science, 18, 173 (2013)
B. Jiang, Y. Yang, L.J. Du, J.D. Wang, Y.R. Yang, S. Stapf Advanced catalyst technology for broad/bimodal polyethylene, achieved by polymer-coated particles supporting hybrid catalyst Ind. Eng. Chem. Res., 52, 2501 (2013)
M. Raue, A. Bernet, M. Küppers, S. Stapf, H.-W. Schmidt, B. Blümich T. Mang, Sodium NMR relaxation – a versatile non-invasive tool for the monitoring of phase transitions and the estimation of effective pore sizes of supramolecular hydrogels Prog. Colloid Polymer Sci., 140, 45 (2013)
M. Raue, J. Martins, M. Küppers, T. Mang, B. Blümich, S. Stapf Visualization of hydrogel shrinkage due to ion replacement by 27Al and 23Na magnetic resonance imaging Prog. Colloid Polymer Sci., 140, 35 (2013)
C. Mattea, S. Ghoshal, E. Pabianczyk and S. Stapf Poly(vinyl alcohol)Film Formation Process Using Single-Sided Low-Field NMR Relaxometry: Effect of Initial Concentration Microporous & Mesoporous Materials, 178, 27, (2013)
S. Muncaci, C. Mattea, S. Stapf, and I. Ardelean Frequency-dependent NMR relaxation of liquids confined inside porous media containing an increased amount of magnetic impurities Magn. Reson. Chem. 51, 123 (2013)
N. Fatkullin, A. Gubaidullin, C. Mattea, and S. Stapf On the theory of the proton free induction decay and Hahn echo in polymer systems: The role of intermolecular magnetic dipole-dipole interactions and the modified Anderson–Weiss approximation J. Chem. Phys. 137, 224097 (2012)
S. Ghoshal, C. Mattea, L. Du, and S. Stapf Concentration and Humidity Effect on Gelatin Films Studied by NMR Z. Phys. Chem. 226, 1259 (2012), DOI 10.1524/zpch.2012.0310
Q. Vuong, S. Van Doorslaer, J.-L. Bridot, C. Argante, G. Alejandro, R. Hermann, S. Disch, C. Mattea, S. Stapf, Y. Gossuin Paramagnetic nanoparticles as potential MRI contrast agents: characterization, NMR relaxation, simulations and theory Magn. Reson. Mater. Phys. Biol. Med. (MAGMA) , in Press (2012)
T. Shakirov, N. Fatkullin, S. Stapf, P. Khalatur, R. Kimmich Computer simulation of polymer dynamics under confinement in straight cylindrical tubes: cooperativity and onset of the corset effect Polym. Sci A, in press
S. Ahola, V. Telkkia, S. Stapf Velocity distributions in a micromixer measured by NMR imaging Lab on a Chip (DOI: 10.1039/c2lc21214e)
S. Ghoshal, P. Denner, S. Stapf, C. Mattea Study of the Formation of Poly(vinyl alcohol) Films Macromolecules 45, 1913 (2012)
R. Nechifor, I. Ardelean, C. Mattea, S. Stapf, M. Bogdan NMR relaxation dispersion of Miglyol molecules confined inside polymeric microcapsules Magn. Reson. Chem. 49, 730 (2011)
S. Ghoshal, P. Denner, S. Stapf, C. Mattea Structural and dynamical heterogeneities in PVA films induced by evaporation during the formation process Chem. Phys. Lett., 515, 231 (2011)
E. Roessler, C. Mattea, A. Mollova, S. Stapf Low-field one-dimensional and direction-dependent relaxation imaging of bovine articular cartilage J. Magn. Reson., 213, 112 (2011)
L. Stingaciu, L. Weihermüller, A. Pohlmeier, S. Stapf, H. Vereecken Determination of soil hydraulic properties using magnetic resonance techniques and classical soil physics measurements AIP Conf. Proc. 1330, 77 (2011)
L. Buljubasich, B. Blümich, S. Stapf Monitoring mass transport in heterogeneously catalyzed reactions by field-gradient NMR for assessing reaction efficiency in a single pellet J. Magn. Reson., 212, 47 (2011)
N. Fatkullin, C. Mattea, S. Stapf A simple scaling derivation of the shear thinning power law exponent in entangled polymer melts Polymer, 52, 3522 (2011)
O. Neudert, S. Stapf, C. Mattea Molecular exchange of n-hexane in zeolite sieves studied by diffusion-diffusion and T1-diffusion NMR exchange spectroscopy New J. of Physics, 13, 035018 (2011)
X. Shi, J. Wang, B. Jiang, Y. Yang, C. Mattea, S. Stapf Effects of thermo-oxidative aging on chain mobility, phase composition and mechanical behaviour of high density polyethylene Polymer Engineering & Science, 51, 2171 (2011)
A. Omrani, A. Mollova, C. Mattea, S. Stapf Relaxation times and in situ kinetic analysis during network evolution of epoxy via a Nickel catalyst of Imidazole Polymer Testing Thermochimica Acta, 516, 52 (2011)
O. Neudert, S. Stapf, C. Mattea Diffusion exchange NMR spectroscopy in inhomgeneous magnetic fields J. Magn. Reson. 208, 256 (2011)
S. Ghoshal, C. Mattea, P. Denner, S. Stapf Heterogeneities in gelatin film formation using single-sided NMR J. Phys. Chem. B, 114, 16356 (2010)
L. Buljubasich, B. Blümich, S. Stapf Quantification of H2O2 Concentrations in Aqueous Solutions by means of combined NMR and pH Measurements Phys. Chem. Chem. Phys., 12, 13166 (2010)
N. Fatkullin, A. Gubaidullin, S. Stapf Features of polymer chain dynamics as revealed by intermolecular nuclear magnetic dipole-dipole interaction: model calculations and field-cycling NMR relaxometry J. Chem. Phys. 132, 094903/1-17 (2010)
S. Haber-Pohlmeier, S. Stapf, A. Pohlmeier Water flow monitored by tracer transport in natural porous media using MRI Vadose Zone J. 9, 835 (2010)
S. Haber-Pohlmeier, S. Stapf, D. van Dusschoten, A. Pohlmeier Relaxation in a natural soil: comparison of relaxometric imaging, T1-T2 correlation and fast-field cycling NMR The Open Magn. Reson. J. 3, 57-62 (2010)
S. Ghoshal, C. Mattea, S. Stapf Inhomogeneity in the drying process of gelatine film formation. NMR microscopy and relaxation study Chem. Phys. Lett. 485, 343-347 (2010)
L. R. Stingaciu, L. Weihermüller, S. Haber-Pohlmeier, S. Stapf, H. Vereecken, A. Pohlmeier Determination of pore size distribution and hydraulic properties from Nuclear Magnetic resonance (NMR) relaxometry: a comparison study of laboratory methods Water Res. Res. 46, W 11510 (2010)
L. Buljubasich, B. Blümich, S. Stapf Reaction Monitoring of Hydrogen Peroxide decomposition by NMR Relaxometry Chem. Eng. Sci. 65, 1394-1399 (2010)
S. Ayalur-Karunakaran, B. Blümich, S. Stapf Chain dynamics of a weakly adsorbing polymer in thin films Langmuir 25, 12208-12216 (2009)
L. Buljubasich, B. Blümich, S. Stapf Investigation of the heterogeneous catalytic decomposition of H2O2 AIP Conf. Proc. 1081, 67-70 (2008)
L. R. Stingaciu, A. Pohlmeier, D. van Dusschoten, L. Weihermüller, P. Blümler, S. Stapf, H. Vereecken Investigation of unsaturated porous media by high-field and low-field NMR relaxometry Water Res. Res. 45, W08412 (2009)
A. Pohlmeier, S. Haber-Pohlmeier, S. Stapf A Fast field cycling NMR relaxometry study of natural soils Vadose Zone J. 8, 735-742 (2009)
S. Ayalur-Karunakaran, B. Blümich, S. Stapf NMR investigations of polymer dynamics in a partially filled porous matrix Eur. Phys. J. E 26, 43-54 (2008)
X.W. Yan, X.H. Ren, S. Stapf, J.D. Wang, Y.R. Yang Self-diffusion coefficients of organic solvents in linear and branched high density polyethylene particles measured by PFG NMR Chin. Chem. Lett. 19, 110-114 (2008)
D. Papadopoulos, M.A. Voda, S. Stapf, F. Casanova, M. Behr, B. Blümich Magnetic field simulations in support of interdiffusion quantification with NMR Chem. Eng. Sci. 63, 4694-4703 (2008)
X.W. Yan, J.D. Wang, X.H.Ren, Y.R. Yang, B.B. Jiang, M.A. Voda, M. Bertmer, S. Stapf Phase structures of nascent polyethylene powderstudied by wideline proton NMR Chin. J. Chem. 25, 863-868 (2007)
B. Blümich, L. B. Datsevich, A. Jess, T. Oehmichen, X. Ren, S. Stapf Chaos in catalyst pores – can we use it for process development? Chem. Eng. J. 134, 35-44 (2007)
S. Ahola, J. Perlo, F. Casanova, S. Stapf, B. Blümich Multiecho sequence for velocity-imaging in inhomogeneous rf fields J. Magn. Reson. 182, 143-151 (2006)
J. Zhou, Y.R. Yang, X.H. Ren, S. Stapf Investigation of reinforcement of the modified carbon black from wasted tires by nuclear magnetic resonance J. Zhejiang Univ Science A 7, 1440-1446 (2006)
S. Ahola, F. Casanova, J. Perlo, K. Münnemann, B. Blümich, S. Stapf Monitoring of fluid motion in a micromixer by dynamic NMR microscopy Lab on a Chip 6, 90-95 (2006)
S. Harms, S. Stapf, B. Blümich Application of k-space and q-space encoding NMR techniques on granular media in a 3D model fluidised bed reactor J. Magn. Reson. 178, 308-317 (2006)
E. Groß-Hardt, A. Amar, S. Stapf, A. Pfennig, B. Blümich Flow Dynamics Inside a Single Levitated Droplet Ind. Eng. Chem. Res. 45, 416-423 (2006)
T. Merzliak, I. Bartusseck, S. Stapf, M. A. Voda, B. Blümich, A. Pfennig Description of Intra-Diffusion in Liquid Mixtures Fluid Phase Equilibria 245, 158-167 (2006)
S. Stapf, S. Kariyo Dependence of order and dynamics in polymers and elastomers under deformation revealed by NMR techniques Acta Phys. Pol. A 108, 247-259 (2005)
A. Amar, E. Groß-Hardt, A. A. Khrapitchev, S. Stapf, A. Pfennig, B. Blümich Visualizing Flow Vortices Inside a Single Levitated Drop J. Magn. Reson. 177, 74-85 (2005)
A. Amar, S. Stapf, B. Blümich Internal fluid dynamics in levitated drops by fast Magnetic Resonance Velocimetry Phys. Rev.E 72, 030201 (2005)
X. Ren, S. Stapf, B. Blümich Magnetic resonance visualisation of flow and pore structure in packed beds with low aspect ratio Chem. Eng. Technol. 28, 219-225 (2005)
S. Kariyo, S. Stapf, B. Blümich Restricted molecular dynamics of polymer chains by means of NMR field cycling relaxometry Macromol. Chem. Phys. 206, 1300-1310 (2005)
S. Kariyo, S. Stapf Site-specific proton and deuteron NMR relaxation dispersion in selectively deuterated polyisoprene Macromol. Chem. Phys. 206, 1292-1299 (2005)
S. Stapf, X. Ren, E. Talnishnikh, B. Blümich Spatial distribution of coke residues in porous catalyst pellets analyzed by field-cycling relaxometry and parameter imaging Magn. Reson. Imaging, 23, 383-386 (2005)
S. Kariyo, M. Küppers, M. Badiger, A. Prabhakar, B. Jagadeesh, S. Stapf, B. Blümich Morphology and chain dynamics during collapse transition of PNIPAM gels studied by combined imaging, relaxometry, and 129Xe spectroscopy techniques Magn. Reson. Imaging, 23, 249-253 (2005)
D. Tang, A. Jess, X. Ren, B. Blümich, S. Stapf Axial dispersion and wall effects in narrow fixed bed reactors – a comparative study based on RTD- and NMR-measurements Chem. Eng.Technol. 27, 866-873 (2004)
Z. Fojud, E. Szczesniak, S. Jurga, S. Stapf, R. Kimmich Molecular dynamics of n-dodecylammonium chloride in aqueous solutions investigated by 2H NMR and 1H NMR relaxometry Solid State Nucl. Magn. Reson. 25, 200-206 (2004)
S. Kariyo, S. Stapf NMR relaxation dispersion of vulcanized natural rubber Solid State Nucl. Magn. Reson. 25, 64-71 (2004)
B. Doumèche, M. Küppers, S. Stapf, B. Blümich, W. Hartmeier, M. B. Ansorge-Schumacher New approaches to the visualisation, quantification and explanation of acid-induced water loss from Ca-alginate hydrogel beads J. Microencapsulation 21, 565-573 (2004)
X.-H. Ren, S. Stapf, B. Blümich Nuclear magnetic resonance velocity imaging and velocity distribution measurements for flow in model fixed-bed reactors of low tube-to-particle diameter ratio AIChE J. 51, 392-405 (2005)
S. Kariyo, S. Stapf Influence of cross-link density and deformation on the NMR relaxation dispersion of natural rubber Macromolecules 35, 9253-9255 (2002)
X.-H. Ren, S. Stapf, H. Kühn, D. E. Demco, B. Blümich Molecular mobility in fixed-bed reactors investigated by multiscale NMR techniques Magn. Reson. Imaging 21, 261-268 (2003)
A. A. Khrapitchev, S. Han, S. Stapf, B. Blümich Spectrally Resolved Velocity Exchange Spectroscopy of Two-Phase Flow J. Magn. Reson. 159, 36-45 (2002)
A. A. Khrapitchev, S. Stapf, P. T. Callaghan NMR visualisation of displacement correlations for flow in porous media Phys. Rev. E 66, 051203/1-16 (2002)
S. Stapf NMR investigations of correlations between longitudinal and transverse displacements in flow through random structured media Chem. Phys. 284, 369-388 (2002)
M. Küppers, C. Heine, S. Han, S. Stapf, B. Blümich In-situ observation of diffusion and reaction dynamics in gel microreactors by chemically resolved NMR microscopy Appl. Magn. Reson. 22, 235-246 (2002)
C. Heine, S. Stapf, B. Blümich Two- and three-dimensional waves in falling-film flow in the non-laminar flow regime – an NMR study Appl. Magn. Reson. 22, 223-233 (2002)
S. Stapf, S. Han, C. Heine, B. Blümich Spatio-temporal correlations in transport processes determined by multi-PFG experiments Concepts Magn. Reson. 14, 172-211 (2002)
R. Savelsberg, D. E. Demco, B. Blümich, S. Stapf Particle motion in gas-fluidized granular systems by pulsed-field gradient nuclear magnetic resonance Phys. Rev. E 65, 020301(R)/1-4 (2002)
X.-H. Ren, M. Bertmer, S. Stapf, D. E. Demco, B. Blümich, C. Kern, A. Jess Deactivation and regeneration of a naphtha reforming catalyst, Applied Catalysis A 228, 39-52 (2002)
A. A. Khrapitchev, S. Stapf, P. T. Callaghan Dispersion in porous bead packs studied by velocity exchange spectroscopy NATO Science Series II: Mathematics, Physics and Chemistry, Vol. 76, 553-558 (2002)
X. H. Ren, M. Bertmer, H. Kühn, S. Stapf, D. E. Demco, B. Blümich, C. Kern, A. Jess 1H, 13C and 129Xe NMR study of changing pore size and tortuosity during deactivation and decoking of a naphtha reforming catalyst NATO Science Series II: Mathematics, Physics and Chemistry, Vol. 76, 603-608 (2002)
S. Han, S. Stapf, B. Blümich Catching a falling drop by NMR: correlation of position and velocity NATO Science Series II: Mathematics, Physics and Chemistry, Vol. 76, 327-336 (2002)
B. Blümich, S. Han, C. Heine, R. Eymael, M. Bertmer, S. Stapf Analysis of slow motion by multidimensional NMR NATO Science Series II: Mathematics, Physics and Chemistry, Vol. 76, 3-14 (2002)
S. Stapf, C. Heine, S. Han, B. Blümich Spatio-temporal correlations in gravity-driven and pressure-driven fluid transport processes NATO Science Series II: Mathematics, Physics and Chemistry, Vol. 76, 423-432 (2002)
C. Heine, K. Kupferschläger, S. Stapf, B. Blümich NMR velocimetry of falling liquid films J. Magn. Reson. 154, 311-316 (2002)
S. Han, S. Stapf, B. Blümich NMR imaging of falling water drops Phys. Rev. Lett. 87, 144501/1-4 (2001)
B. Blümich, P. T. Callaghan, R. A. Damion, S. Han, A. A. Khrapitchev, K. J. Packer, S. Stapf Two-dimensional NMR of velocity exchange: VEXSY and SERPENT J. Magn. Reson. 152, 162-167 (2001)
S. Stapf Determination of velocity autocorrelation functions by multiple data acquisition in NMR pulsed-field gradient experiments J. Magn. Reson. 152, 308-312 (2001)
S. Stapf, B. Blümich Multi-gradient pulse investigations of fluid transport in porous media Magn. Reson. Imaging 19, 385-389 (2001)
B. Blümich, D. E. Demco, S. Stapf, U. Görke, C. Chwatinski, L. Gasper, R. Giesen, R. Haken, S. Han Functional NMR imaging of materials Polymeric Materials Science and Engineering 82, 148 (2000)
S. Han, S. Stapf, B. Blümich Two-dimensional PFG NMR for encoding correlations of position, velocity and acceleration in fluid transport J. Magn. Reson. 146, 169-180 (2000)
M. I. Menzel, S. Han, S. Stapf, B. Blümich NMR characterization of the pore structure and anisotropic self-diffusion in salt water ice J. Magn. Reson. 143, 376-381 (2000)
S. Stapf, K. J. Packer, S. Békri, P. M. Adler Two-dimensional NMR measurements and numerical simulations of fluid transport in porous rocks Phys. Fluids 12, 566-580 (2000)
S. Stapf, K. J. Packer Two-dimensional propagators and spatio-temporal correlations for flow in porous solids: a comparative study Appl.Magn. Reson. 15, 303-322 (1998)
S. Stapf, R. A. Damion, K. J. Packer Time correlations in fluid transport obtained by sequential rephasing gradient pulses J. Magn. Reson. 137, 316-323 (1999)
S. Stapf, K. J. Packer, R. G. Graham, J.-F. Thovert, P. M. Adler Spatial correlations and dispersion for fluid transport through packed glass beads Phys. Rev. E 58, 6206-6221 (1998)
I. Ardelean, R. Kimmich, S. Stapf, D. E. Demco The nonlinear stimulated echo in the presence of inequivalent spins J. Magn. Reson. 132, 138-143 (1998)
K. J. Packer, S. Stapf, J. J. Tessier, R. A. Damion The characterisation of fluid transport in porous solids by means of pulsed magnetic field gradient NMR Magn. Reson. Imaging 16, 463-469 (1998)
F. Grinberg, R. Kimmich, S. Stapf Molecular dynamics and order of microconfined liquid crystals Magn. Reson. Imaging 16, 635-637 (1998)
T. Zavada, S. Stapf, R. Kimmich Diffusion and relaxation in interface layers of crystals in nanoporous materials Magn. Reson. Imaging 16, 695-697 (1998)
T. Zavada, S. Stapf, U. Beginn, R. Kimmich Field-cycling proton NMR relaxometry of molecules undergoing Lévy walks at the surface of fine particles and porous glass Magn. Reson. Imaging 16, 711-713 (1998)
S. Stapf, R. Kimmich Translational mobility in surface induced liquid layers investigated by NMR diffusometry Chem. Phys. Lett. 275,261-268 (1997)
S. Stapf, R. Kimmich Translational versus rotational molecular dynamics in plastic crystals studied by NMR relaxometry and diffusometry Molec. Phys. 92, 1051-1060 (1997)
I. Ardelean, R. Kimmich, S. Stapf, D. E. Demco Multiple nonlinear stimulated echoes J. Magn. Reson. 127, 217-224 (1997)
R. Kimmich, T. Zavada, S. Stapf NMR Experiments on molecular dynamics in nanoporous media: evidence for Lévy walk statistics Mat. Res. Soc. Symp. Proc. 464, 313-324 (1997)
I. Ardelean, S. Stapf, D. E. Demco, R. Kimmich The nonlinear stimulated echo J. Magn. Reson. 124, 506-508 (1997)
S. Stapf, R. Kimmich, T. Zavada Dynamics of plastic and liquid cyclohexane in bulk and in porous glasses studied by NMR methods Appl. Magn. Reson. 12, 199-212 (1997)
R. R. Valiullin, V. D. Skirda, S. Stapf, R. Kimmich Molecular exchange processes in partially filled porous glass as seen with NMR diffusometry Phys. Rev. E 55, 2664-2671 (1997)
S. Stapf, R. Kimmich, R.-O. Seitter, A. I. Maklakov, V. D. Skirda Proton and deuteron field-cycling NMR relaxometry of liquids confined in porous glasses Colloids Surfaces A: Physicochem. Eng. Aspects 115, 107-114 (1996)
F. Grinberg, R. Kimmich, S. Stapf Investigation of molecular order and dynamics in liquid crystals confined in porous media using the dipolar-correlation effect of the stimulated echo Magn. Reson. Imaging 14, 883-885 (1996)
S. Stapf, R. Kimmich, R.-O. Seitter Field-cycling NMR relaxometry of liquids confined in porous glass:evidence for Lévy-walks Magn. Reson. Imaging 14, 841-846 (1996)
R. Kimmich, S. Stapf, A, I. Maklakov, V. D. Skirda, E. V. Khozina Self-diffusion in fluids in porous glass: confinement by pores and liquid adsorption layers Magn. Reson. Imaging 14, 793-797 (1996)
S. Stapf, R. Kimmich Field-cycling NMR relaxometry and field-gradient NMR diffusometry of polymers confined in porous glasses: evidence for a restricted-geometry effect Macromolecules 29, 1638-1641 (1996)
S. Stapf, R. Kimmich Molecular dynamics in confined monomolecular layers. A field-cycling nuclear magnetic resonance relaxometry study of liquids in porous glass J. Chem. Phys., 103, 2247-2250 (1995)
S. Stapf, R. Kimmich, R.-O. Seitter Proton and deuteron field-cycling NMR relaxometry of liquids in porous glasses: evidence for Lévy-walk statistics Phys. Rev. Lett., 75, 2855-2858 (1995)
R. Kimmich, S. Stapf, R.-O. Seitter, P. T. Callaghan, E. V. Khozina Molecular dynamics of monomer, oligomer, and polymer liquids in porous media: a field-cycling NMR relaxometry and NMR field-gradient diffusometry study Mat. Res. Soc. Symp. Proc., 366, 189-200 (1995)
R. Kimmich, N. F. Fatkullin, H. W. Weber, S. Stapf Nuclear spin-lattice relaxation and theories of polymer dynamics J. Non-Cryst. Solids, 172-174, 689-697 (1994)
R. Kimmich, S. Stapf, M. Möller, R. Out, R.-O. Seitter Field-cycling NMR relaxation spectroscopy of poly(di-n-alkylsiloxanes) in solid, mesomorphic liquid, and isotropic liquid phases Macromolecules, 27, 1505-1508 (1994)
R. Kimmich, S. Stapf, P. T. Callaghan, A. Coy Microstructure of porous media probed by NMR techniques in sub-micrometer length scales Magn. Reson. Imaging, 12, 339-343 (1994)
S. Stapf, R. Kimmich, J. Niess Microstructure of porous media and field-cycling nuclear magnetic resonance relaxation spectroscopy J. Appl. Phys. 75, 529-537 (1994)
