TY  - GEN
ID  - heidok7771
KW  - infrarote Synchrotronstrahlung 
KW  -  PolarisationsmodulationFTIR spectroscopy 
KW  -  infrared synchrotron radiation 
KW  -  polarization modulation
AV  - public
TI  - Exploring synthetic and biological polymer composites with polarization-modulated mid-infrared synchrotron radiation
Y1  - 2007///
N2  - The innovative application of physical methods is required in order to gain comprehensive qualitative as well as quantitative insights into the structures and the properties of complex materials and systems. In this work, the novel hyphenation of synchrotron-based Fourier-transform infrared microspectroscopy with polarization modulation was implemented. The in this combination so far unique microprobe was designed for the non-destructive in situ study of the composition and the structural anisotropy in small or heterogeneous samples. A key feature demonstrated is the ability of the instrument to spatially resolve infrared linear dichroism down to the diffraction limit by using infrared synchrotron radiation. Another characteristic of great potential was shown to be the capability of obtaining orientation information in reference-free measurements. The reference-free and near-diffraction-limited mapping of infrared linear dichroism in fiber-reinforced polypropylene model composites was demonstrated. Measurements on single wood fibers illustrated the capabilities of the method to investigate (bio)polymeric multicomponent and multiphase systems. It was shown that the method can provide new insights into synthetic and biological polymer composites. It is more widely applicable to investigations of complex synthetic and biological materials. For a complete understanding of the structure and the function of biological macromolecules and complex biological systems it is necessary to measure them in their native environment. Therefore, a microfluidic infrared transmission cuvette for measurements of biological systems in aqueous medium was implemented in this work. This cuvette was used for the in situ study of wood polymers in the presence of liquids.  Furthermore, it was suitable for the in situ measurement of living cells by infrared microspectroscopy. The microfluidic cuvette was shown to be a versatile device which may be used as a miniincubator and an infrared measurement chamber with varied possible further applications. 
A1  - Schmidt, Martin
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/7771/
ER  -