Berlin 2005 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 29: POSTER: Polymer physics

CPP 29.9: Poster

Dienstag, 8. März 2005, 16:30–18:30, Poster TU D

Patterning in Azobenzene Polymer Films — •Knut Morawetz1, Burkhars Stiller1, Thomas Geue2, Marina Saphiannikova1, and Ullrich Pietsch11Institute of Physics, University of Potsdam, Am Neuen Palais 10, 14469 Potsdam — 2Paul Scherrer Institute, ETH Zurich, Switzerland

Thin azobenzene polymer films show a interesting property namely the optically induced material transport. The physical mechanism underlying this phenomenon has not yet been thoroughly understood. Nevertheless this effect enables to inscribe different structures onto the film surface including one- and two-dimensional periodical structures. Typical size of such structures is about one micrometer, i.e. it is comparable with a wavelength of the laser used for optical excitation. In this study we have measured mechanical properties of the one- and two-dimensional gratings with a high lateral resolution. It was used force-distance curves and pulse force mode of the atomic force microscope. We also report on the generation of considerably finer structures with a typical size of 100 nm, which were inscribed onto the polymer surface by an optical pen (by the cantilever of a scanning near-field optical microscope). Such kind of inscription does not only open new possibilities for applications but also gives a deeper insight into the physical fundamentals of the optically induced material transport.

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