Regensburg 2007 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 17: Poster Session I (Nanostructures at Surfaces; Metal Substrates: Epitaxy and Growth; Methods: Scanning Probe Techniques; Phase Transitions)

O 17.22: Poster

Montag, 26. März 2007, 17:30–20:30, Poster C

Metal deposition into ordered molecular precursor layers - an STM study — •Achim Breitruck¹, Christoph Meier², Matthias Roos¹, Michael Roos¹, Harry E. Hoster¹, Ulrich Ziener², and Rolf J. Behm¹ — ¹Institut für Oberflächenchemie und Katalyse, Universität Ulm, 89069 Ulm — ²Institut für Organsiche Chemie III, Universität Ulm, 89069 Ulm

Oligopyridine molecules vapor deposited onto single crystalline surfaces (HOPG, Au(111), Ag(111)) form highly ordered 2D networks, with a geometry depending on coverage, preparation temperature and substrate, which mainly result from C-H***N type hydrogen bridges between neighboring molecules. They can be imaged by UHV-STM with high resolution even at room temperature. Using these adlayers as precursors, we investigate the effect of metals subsequently vapor deposited onto these networks, which in many cases leads to the formation of new ordered metal organic structures. The influence of metal-molecule, metal-substrate, molecule-substrate and molecule-molecule interactions on the structure formation is discussed.