Regensburg 2007 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 44: Poster Session II (Semiconductors; Oxides and Insulators: Adsorption, Clean Surfaces, Epitaxy and Growth; Surface Chemical Reactions and Heterogeneous Catalysis; Surface or Interface Magnetism; Solid-Liquid Interfaces; Organic, Polymeric, Biomolecular Films; Particles and Clusters; Methods: Atomic and Electronic Structure; Time-resolved Spectroscopies)

O 44.19: Poster

Mittwoch, 28. März 2007, 17:00–19:30, Poster C

Valence electronic structure of the PTCDA/Au(111) interface — •Johannes Ziroff, Simon Hame, Frank Forster, Azzedine Bendounan, and Friedrich Reinert — University of Würzburg, Experimental Physics II, Am Hubland, 97074 Würzburg, Germany

We present angular and energy resolved UPS spectra of PTCDA (3,4,9,10-perylene-tetracarboxylic-dianhydride) on the Au (111) surface from the sub-monolayer range to thick films. Using the Shockley state as a probe, one can investigate the substrate-adsorbate interaction of the first monolayer. We will show and discuss changes of binding energy and Rashba term upon adsorption. The valence features of the adsorbed PTCDA molecule, as well as their coverage dependent changes in intensity and binding energy will be addressed. Examples for the use of the surface state as an indicator for the type of thin film growth will also be presented.