Dresden 2009 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 27: Poster Session I (Methods: Scanning probe techniques; Methods: Atomic and electronic structure; Methods: Molecular simulations and statistical mechanics; Oxides and Insulators: Clean surfaces; Oxides and Insulators: Adsorption; Oxides and Insulators: Epitaxy and growth; Semiconductor substrates: Clean surfaces; Semiconductor substrates: Epitaxy and growth; Semiconductor substrates: Adsorption; Nano- optics of metallic and semiconducting nanostructures; Electronic structure; Methods: Electronic structure theory; Methods: other (experimental); Methods: other (theory); Solutions on surfaces; Epitaxial Graphene; Surface oder interface magnetism; Phase transitions; Time-resolved spectroscopies)

O 27.36: Poster

Dienstag, 24. März 2009, 18:30–21:00, P2

The cross-linked (1×2) surface reconstruction of rutile TiO₂ (110) — •Hans Hermann Pieper, Stephan Bahr, Stefan Torbrügge, and Michael Reichling — Institute of Physics, University of Osnabrueck, Germany

Titania is one of the most investigated metal oxides and its surfaces are frequently taken as model catalysts for the partial oxidation of hydrocarbons. There is a large number of publications dedicated to investigations of the pure unreconstructed rutile (110) surface and its interaction with atoms and molecules. However, the different surface reconstructions found for reduced crystals are still under discussion. We investigate the cross–linked (1×2) reconstruction by atomic resolution dynamic scanning force microscopy. We interpret images considering that the atomic tip termination and the tip surface distance have a huge influence on the tip-surface interaction, therefore, strongly influencing the atomic contrast formation. We compare our data to three frequently discussed surface reconstruction models and a perfect agreement with one of them is demonstrated.