Dresden 2009 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 53: Nanostructures at surfaces: Dots, particles, clusters III
O 53.8: Vortrag
Donnerstag, 26. März 2009, 16:45–17:00, SCH A215
Silver cluster growth on highly oriented molecular films — •Günther Weidlinger1, Lidong Sun1, Michael Hohage1, Sina Gusenleitner2, Stephen Berkebile2, Michael Ramsey2, and Peter Zeppenfeld1 — 1Institut für Experimentalphysik, Johannes Kepler Universität Linz, Altenberger Straße 69, A-4040 Linz — 2Institut für Physik, Fachbereich Experimentalphysik, Karl-Franzens-Universität Graz, Universitätsplatz 5, A-8010 Graz
Para-sexiphenyl (p-6P) was deposited on the Cu(110)-(2x1)O surface at room temperature under UHV conditions. The structure of the (2x1)-reconstructed substrate served as a template for the growth of a highly ordered molecular film. The sequential deposition of p-6P films was monitored by means of Reflectance Difference Spectroscopy (RDS) showing a high optical anisotropy at the HOMO-LUMO transition energy, which is characteristic for the growth of a well-oriented molecular layer. Following the growth of this molecular layer, Ag clusters were prepared on the p-6P film by means of physical vapor deposition. The cluster growth can be monitored by the RD signal related to the particle plasmon resonance of the Ag clusters. Ex-situ AFM studies of these samples reveal that the Ag clusters are distributed homogeneously on the p-6P layer. Furthermore, photoelectron emission spectroscopy measurements show that the p-6P features are absent in the corresponding spectra, indicating that the Ag clusters are on top of the p-6P layer.