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O: Fachverband Oberflächenphysik

O 60: Poster Session IV (Solid/liquid interfaces; Semiconductors; Oxides and insulators; Graphene; Plasmonics and nanooptics; Electronic Structure; Surface chemical reactions; Heterogeneous catalysis)

O 60.127: Poster

Mittwoch, 16. März 2011, 17:30–21:00, P4

HR-EELS studies on zinc oxide powders samples — •Sebastian Frey, Martin Kroll, Dietmar Rother, and Ulrich Köhler — Ruhr-Universität Bochum, Deutschland

Zinc oxide powders are an important catalyst for a number of organic reactions, e.g. the synthesis of methanol. Corresponding surface science studies, on the other hand, mainly deal with single crystalline surfaces. Since this situation is quite different from a real catalyst, this work concentrates on the vibrational spectroscopy analysis of ZnO powder samples using high resolution electron energy loss spectroscopy (HR-EELS) to deliver supplementary information to the existing single crystal studies. At first we present different approaches to fix the ZnO powder on a gold substrate for vacuum treatment including XRD and SEM-analysis. Finally, the results of our HR-EELS measurements of the ZnO powder samples exposed to different organic molecules like methanol and formic acid are displayed in comparison to the (0001), (000-1) and (10-10) single crystal surfaces.