Dresden 2011 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 11: Poster: New Instruments and Methods
CPP 11.7: Poster
Montag, 14. März 2011, 17:30–19:30, P2
Imaging Polymer Nanostructures with Scanning Transmission X-ray Spectro-Microscopy — •Benjamin Watts1, Christopher McNeill2, and Jörg Raabe1 — 1Swiss Light Source, Paul Scherrer Institut, 5232 Villigen, Switzerland. — 2Cavendish Laboratory, University of Cambridge, J J Thomson Ave, Cambridge CB3 0HE, United Kingdom.
Thin polymer films are of increasing technological importance in optoelectronic devices such as LEDs, lasers, FETs and solar cells. However, the morphology of such films is complex, often displaying three dimensional composition structure or molecular alignment effects. The structure of the polymer film incorporated into a device can strongly affect its performance characteristics, e.g. via the connectedness between of polymer domains and to the device electrodes, or due to anisotropic material properties due to molecular alignment.
Scanning transmission x-ray spectro-microscopy (STXM) has been demonstrated to be an excellent tool for the study of polymer materials due to its high spatial resolution and strong contrast based on a variety of spectroscopic mechanisms. Recent work at the PolLux STXM has demonstrated two new developments in the imaging of thin polymer films: simultaneous surface and bulk imaging via an additional channeltron TEY detector, and molecular orientation mapping via anisotropic near edge resonances.