Dresden 2006 – scientific programme

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O: Oberflächenphysik

O 14: Poster session I (Adsorption, Epitaxy and growth, Phase transitions, Surface reactions, Organic films, Electronic structure, Methods) (sponsored by Omicron Nanotechnology GmbH)

O 14.47: Poster

Monday, March 27, 2006, 18:00–21:00, P2

STM study of CuPC molecules on Cu(111) and Au(111) — •Stefan Kuck, Andre Wachowiak, Germar Hoffmann, and Roland Wiesendanger — Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg, 20355 Hamburg, Germany

Local probe techniques have proven to be a powerful tool for investigations of growth phenomena and intermolecular orientational order of thin molecular layers and single molecules on a substrate surface. The delicate balance between substrate temperature, molecules and intermolecular interaction determines varieties of observed structures. Using a homebuilt variable temperature STM (30 K - room temperature) we studied the growth of CuPC molecules on the Cu(111) and Au(111) surfaces. Single CuPC molecules prefer two orientations with respect to the underlying substrate lattice [1]. Scanning tunneling spectroscopy measurements reveal the energetic position of the molecular resonances and show the spatial distribution of molecular orbitals.

[1] P. H. Lippel et al., Phys. Rev. Lett. 62, 171 (1989).