Regensburg 2010 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 41: Poster Session I (Semiconductor Substrates: Epitaxy and growth; Semiconductor Substrates: Adsorbtion; Semiconductor Substrates: Solid-liquid interfaces; Semiconductor Substrates: Clean surfaces; Oxides and insulators: Epitaxy and growth; Oxides and insulators: Adsorption; Oxides and insulators: Clean surfaces; Organic, polymeric and biomolecular films - also with adsorbates; Organic electronics and photovoltaics, Surface chemical reactions; Heterogeneous catalysis; Phase transitions; Particles and clusters; Surface dynamics; Surface or interface magnetism; Electron and spin dynamics; Spin-Orbit Interaction at Surfaces; Electronic structure; Nanotribology; Solid/liquid interfaces; Graphene; Others)

O 41.59: Poster

Dienstag, 23. März 2010, 18:30–21:00, Poster B1

STM-Study of Cu growth on ZnO and TiO₂ Surfaces — •Martin Kroll¹, Abelhadi Chakir¹, Thomas Kuschel¹, Thomas Löber¹, Renate Wansing¹, Vadim Schott², Christof Wöll², and Ulrich Köhler¹ — ¹Experimental Physics IV, Ruhr-Universität Bochum, Germany — ²Physical Chemistry I, Ruhr-Universität Bochum, Germany

The growth of Cu on ZnO(1010) and TiO₂(110) single crystal surfaces was studied as a first step to understand complex catalytically active systems often consisting of small metal clusters on metal oxide surfaces. For local STM studies flat and clean surfaces are needed. On ZnO(1010) the influence of the UHV preparation conditions and the substrate orientation (sample miscut) on the large scale morphology was studied [1].
Cu was deposited on ZnO(1010) by MOCVD. Thermal treatment resulted in a decreasing Cu coverage with increasing temperature up to 670K as already shown for Cu MBE depositon on ZnO(0001) [2]. Chemical analysis of the reaction of the Cu clusters with the ZnO substrate was done by XPS measurements.
Additionally, MBE Cu-growth with comparable coverage and similar thermal treatment on rutile TiO₂(110) was studied. In this case no decrease in Cu coverage up to annealing temperature of 670K was detected.
M.Kroll et al., Surf. Sci. 603, L49 (2009)
M.Kroll, U. Köhler, Surf. Sci. 601, 2182 (2007)