Hamburg 2001 – wissenschaftliches Programm

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SYOF: Organische Festkörper

SYOF 2: Surfaces and Interfaces

SYOF 2.5: Vortrag

Dienstag, 27. März 2001, 12:35–12:50, S6

On the geometric and electronic structure of planar aromatic molecules on metal surfaces: X-ray standing wave results — •F. Schreiber^1,2, S. Sellner^1,2, A. Dürr², K. Ritley², H. Dosch^1,2, B. C. C. Cowie³, and J. Zegenhagen³ — ¹Institut für Theoretische und Angewandte Physik, Universität Stuttgart, D-70550 Stuttgart — ²MPI für Metallforschung, Heisenbergstr. 1, 70569 Stuttgart — ³ESRF, BP 220, F-38043 Grenoble Cedex

The bonding of molecules on metal surfaces is of interest both from a fundamental as well as an applications perspective in view of the need to understand the metal-organic interface in organic electronics. We present x-ray standing wave (XSW) data with XPS and Auger electron detection for selected planar aromatic compounds, such as PTCDA and Phthalocyanines, on Ag(111). We show how the bonding distances to the substrate can be determined. The results are compared for different species within a given molecule. We also analyze the chemical shifts in XPS and the non-dipolar contributions to the XPS cross-section for various compounds and atomic species.