Berlin 2005 – wissenschaftliches Programm

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O: Oberflächenphysik

O 15: Postersitzung (Adsorption an Oberfl
ächen, Epitaxie und Wachstum, Organische Dünnschichten, Oxide und Isolatoren, Rastersondentechniken, Zeitaufgelöste Spektroskopie, Methoden)

O 15.15: Poster

Freitag, 4. März 2005, 17:00–20:00, Poster TU D

Coverage dependent details of benzene adsorption on Ni (111) studied by XPS — •Papp C., Fuhrmann T., Tränkenschuh B., Steinrück H.-P., and Denecke R. — Lehrstuhl für Physikalische Chemie II, Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen.

We studied the adsorption of benzene and fully deuterated benzene on Ni(111) by in-situ XPS at the synchrotron radiation facilities BESSY II, Berlin and MAX II, Lund. The spectra show some significant differences occurring during the adsorption process, which are observed for the first time, due to the high energy resolution achieved. To determine the nature of the spectral features giving rise to these differences, we also studied the adsorption of substituted benzenes (e.g. chlorobenzene) and benzene coadsorbed with CO and NO. Based on a quantitative analysis of the spectra and their features, models are proposed, which can explain the observed differences. The aim of these models is to distinguish between conformational and electronic effects. Supported by the DFG (STE 620/4-2) and a European Community ARI program (HPRI-CT-2001-00135).