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O: Fachverband Oberflächenphysik

O 12: Oxides and insulators: Adsorption

O 12.10: Vortrag

Montag, 22. März 2010, 17:15–17:30, H33

NEXAFS/XPS Study of the Organic Molecules on Metal-Oxide Surfaces — •Michael Naboka^{1, 2}, Alexei Nefedov^{1, 2}, and Christof Wöll² — ¹Ruhr University of Bochum, D-44780, Bochum, Germany — ²Karlsruher Institute of Technology, D-76344, Eggenstein-Leopoldshafen, Germany

Today the investigation of the electronic properties and orientation of the organic molecules adsorbed on metal-oxide single crystal surfaces attracts considerable attention. The reason for that is a search for the new metal organic systems which may become useful in the rapidly developing area of organic electronics and catalysis. The example of such a system can be a terephtalic acid adsorbed on the TiO₂ (110) surface. This system offers a possibility to create the monolayer of the carboxyl-terminated up-standing molecules which may in future have an application similar to self-assembling monolayers or may also serve as a linker for Metal Organic Frameworks (MOFs). Near Edge X-Ray Adsorption Fine Structure (NEXAFS) spectroscopy and X-ray Photoelectron Spectroscopy (XPS) are the techniques which were developed particularly for the study and understanding of the organic molecules structure on the surface revealing the molecular electronic structure and its orientation. Since nowadays requirements for such kind of research are increased the new NEXAFS/XPS endstation at synchrotron facility BESSY II has been developed and constructed. The machine functionalizes under ultrahigh vacuum conditions and allows to measure NEXAFS/XPS spectra as well as to use the additional surface science methods such as LEED and TDS.