Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 28: POSTERS Interfaces and Thin Films
CPP 28.5: Poster
Mittwoch, 25. März 2009, 17:00–19:00, P3
Growth of gold thin films on PVK-coated nanostructured titanium dioxide — Stephan V. Roth2, •Gerd Herzog1,2, Ralf Röhlsberger2, Sebastien Couet2, Kai Schlage2, Andre Rothkirch2, Andreas Timmann2, Ralph Döhrmann2, Nadja Reimers2, Heinz Graafsma2, Michael Lohmann2, D. Bischoff2, Gunar Kaune3, Matthias Ruderer3, Weinan Wang3, Mottakin M. Abul Kashem3, Ezzeldin Metwalli3, Wilfried Wurth1, Peter Müller-Buschbaum3, and Rainer Gehrke2 — 1Institut für Experimentalphysik der Universität Hamburg, Luruper Chaussee 149, D-22761 — 2HASYLAB at DESY, Notkestr. 85, D-22603 Hamburg, Germany — 3Physik-Department E13, TU München, James-Franck-Str. 1, D-85748 Garching, Germany
PVK-coated nanostructured TiO2 films are candidates for photovoltaic devices. To create an electrode, gold is sputter deposited onto the TiO2/PVK film. Grazing incidence small angle x-ray scattering (GISAXS) is used for in situ investigation of gold cluster growth. Out of plane scans show two clearly separated peaks which leads to the conclusion that a bimodal distribution of particles is present, which we call large and small clusters. The temporal development of out of plane scans illustrates the kinetics of the radius of small clusters, while detector scans and off detector scans at the small clusters’ Yoneda peak are used to discover the vertical growth of large and small clusters, respectively. Since the radius of the large clusters is found to be constant, they are thought to be voids in the polymer film caused by roughness in the TiO2 layer which are filled with gold atoms.