Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 28: POSTERS Interfaces and Thin Films
CPP 28.21: Poster
Mittwoch, 25. März 2009, 17:00–19:00, P3
AFM Studies of photoswitchable nanocomposite films — •M. Müller1, Y. Gonzalez-Garcia1, C. Pakula2, V. Zaporojtchenko2, F. Faupel2, and O. Magnussen1 — 1Institut für Experimentelle und Angewandte Physik,Leibnizstrasse 19,Universität Kiel — 2Lehrstuhl für Materialverbunde,Kaiserstrasse 2,Universität Kiel
Photoswitchable conductive nanocomposites of metal nanoparticles and polymers containing photoizomerizable groups may have interesting applications as sensors and photoswitchable filters. We have investigated composite films of Au clusters and PMMA with embedded azobenzene, which can be optical switched between the trans and the cis isomer, resulting in photo-induced changes in the film conductivity. The film morphology and local conductivity have been characterized by a conductive sensing AFM (CS-AFM) with integrated UV/visible optics that allows in situ studies of illumination effects. According to these studies the change in configuration is accompanied by changes in the nanoscale film morphology, such as changes in free volume and a decrease of the surface roughness.