Measurement module based on a common-path Fabry-Perot interferometer for determining three-degree-of-freedom motion parameters. - In: Proceedings of the 18th International Conference of the European Society for Precision Engineering and Nanotechnology, (2018), S. 115-116
Investigations of the geometrical scaling in the systematic synthesis of compliant mechanisms. - In: Proceedings of the 18th International Conference of the European Society for Precision Engineering and Nanotechnology, (2018), S. 67-68
Intermolecular contribution to proton spin-relaxation in polymer melts: new perspectives for experimental study of polymer melt dynamics. - In: Nexus of food, energy & water, (2018), POLY-605
Intermolecular contribution to proton spin-relaxation in polymer melts: new experimental evidence for entanglement dynamics - does reptation really exist?. - In: Nexus of food, energy & water, (2018), POLY-606
Torsion balance-based system for high-precision force measurement in horizontal plane: part I : development concept. - In: Measurement science and technology, ISSN 1361-6501, Bd. 29 (2018), 8, S. 084001, insges. 12 S.
https://doi.org/10.1088/1361-6501/aaba1f
The implementation of ultra precision rotations to multiaxial nanofabrication machines: challenges and solution concepts. - In: Proceedings of the 18th International Conference of the European Society for Precision Engineering and Nanotechnology, (2018), S. 65-66
Existing long-range nanopositioning and nanomeasuring machines are based on three independent linear movements in a Cartesian coordinate system. This in combination with the specific nature of sensors and tools (further on summarized as tool) limits the addressable part geometries. This article contributes to the enhancement of multiaxial machine structures by the implementation of rotational movements while keeping the precision untouched. A parameter based dynamic evaluation system with quantifiable technological parameters has been set up and employed to identify general solution concepts and adequate substructures. First evaluations show high potential for sample scanning mode variants considering linear movements of the object in combination with angular movements of the tool, considering a goniometer setup in specific. The evaluation system is further enhanced by the implementation of data based on comprehensive design catalogues, uncertainty calculations and CAD-model based footprint analysis for specific setups. To support the selection, detailed parameter sets are generated containing explicit moving ranges, uncertainties, resolutions, reproducibilities and costs. This approach is also applied to the rotation of the object. The results are compared to the tool rotation and mixed versions. After all, the knowledge gained, is formed into general rules for the verification and optimization of design solutions for multiaxial nanopositioning machines.
On precise modelling of very thin flexure hinges. - In: Proceedings of the 18th International Conference of the European Society for Precision Engineering and Nanotechnology, (2018), S. 87-88
The continuously rising demands for precision favour the application of monolithic compliant mechanisms with flexure hinges in various fields of precision engineering. It gives way to an almost frictionless and precise motion even under vacuum conditions. These advantages have made compliant mechanism an integral component of high precision weighing cells. A downside of compliant joints is their stiffness towards deflection, which limits the sensitivity of the overall system. Consequently, the flexure hinges are manufactured as thin as possible. The present limit in terms of manufacturing technology is within the range of 50 [my]m. The objective of predicting the behaviour of highest precision weighing cells by modelling is directly interconnected with the exact knowledge of the behaviour of flexure hinges in terms of stiffness. Especially, for flexure hinges with high aspect ratios, typically found in weighing cells, the existing analytical equations and finite element models show pronounced deviations. The present research effort is dedicated to a clarification of this observation. Structure mechanical finite element models are developed to identify the deviations of the models precisely. Results obtained are compared to analytical results and conclusions for the modelling of thin flexure hinges are drawn.
Molecular transport in ionic liquids under confinement studied by low field NMR. - In: Microporous and mesoporous materials, ISSN 1387-1811, Bd. 269 (2018), S. 171-174
https://doi.org/10.1016/j.micromeso.2017.11.050
Load-dependent NMR low-field profiling and relaxation dispersion study of osteoarthritic articular cartilage. - In: Microporous and mesoporous materials, ISSN 1387-1811, Bd. 269 (2018), S. 160-165
https://doi.org/10.1016/j.micromeso.2017.02.069
Application of CPMG acquisition in Fast-Field-Cycling relaxometry. - In: Microporous and mesoporous materials, ISSN 1387-1811, Bd. 269 (2018), S. 103-108
https://doi.org/10.1016/j.micromeso.2017.05.061