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O: Fachverband Oberflächenphysik
O 55: Poster Session III - MA 141/144 (Methods: Atomic and Electronic Structure; Particles and Clusters; Heterogeneous Catalysis; Semiconductor Substrates: Epitaxy and Growth+Adsorption+Clean Surfaces+Solid-Liquid Interfaces; Oxides and Insulators: Solid-Liquid Interfaces+Epitaxy and Growth; Phase Transitions; Metal Substrates: Adsorption of Inorganic Molecules+Epitaxy and Growth; Surface Chemical Reactions; Bimetallic Nanosystems: Tuning Physical and Chemical Properties; Oxides and insulators: Adsorption; Organic, polymeric, biomolecular films; etc.)
O 55.42: Poster
Mittwoch, 27. Februar 2008, 18:30–19:30, Poster F
Scanning tunneling microscope study of Fe, Co, and Cu- Phthalocyanine growth on metal surfaces — •Shih-Hsin Chang1, Alessandro Scarfato1,2, Germar Hoffmann1, and Roland Wiesendanger1 — 1Institut für Angewandte Physik, Universität Hamburg, Germany — 2Dipartimento di Fisica, University of Salerno, Italy
The growth behaviour of Fe-, Co-, and Cu- Phthalocyanine (Pc) molecules on Cu(111) surfaces has been studied by a variable-temperature scanning tunneling microscope. For all three kinds of Pcs, we find perfect alignment of one molecular axis relative to one of the equivalent crystallographic axis of Cu(111) at submonolayer coverage. At about 1 ML short-range ordered domains appear and molecular configurations are found to have a mismatch angle from the crystallographic axis of Cu(111) due to molecule-molecule interaction. Above 1 ML, well-ordered domains of second layer molecules are formed. Based on STM images molecules were found to be tilted out-of-plane. Still, a substantial variation of the growth behaviour for the different Pc is observable. We will discuss these variations in terms of molecule-molecule and molecule-substrate interactions.