Regensburg 2007 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 11: INTERNAL SYMPOSIUM Scattering Experiments II

CPP 11.10: Hauptvortrag

Dienstag, 27. März 2007, 17:15–17:45, H37

Microbeam Synchrotron Radiation Scattering Experiments in Soft Condensed Matter — •Christian Riekel — ESRF, B.P.220, F-38043 Grenoble Cedex France

The talk will review scientific applications of small- and wide-angle X-ray scattering (SAXS/WAXS) techniques with micron- and submicron-sized X-ray beams at the ESRF. The two complimentary techniques are scanning-SAXS/WAXS and single crystal diffraction. I will show a number of scanning applications for synthetic polymers and biopolymers, which allow the generation of "diffraction images" based on the extraction of specific parameters such as local orientation, strain or crystallinity from a series of diffraction patterns. Single crystal microdiffraction has found many applications in protein crystallography but can also be used for small unit-cell biopolymers. This has allowed in the case of A-amylose replacing the combination of fiber diffraction&molecular modeling by atomic scale structural refinement. Microbeams are also very convenient for in-vivo studies of biological processes like silk extrusion, for studying protein aggregation in microfluidic environments or for grazing-incidence scattering (GISAXS) studies on small sample areas. The examples discussed in the review will show the strong interdisciplinary character of synchrotron radiation research.