Dresden 2009 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 42: Poster Session II (Nanostructures at surfaces: arrays; Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: Other; Nanostructures at surfaces: Wires, tubes; Metal substrates: Adsorption of O and/or H; Metal substrates: Clean surfaces; Metal substrates: Adsorption of organic/bio moledules; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsorption of inorganic molecules; Metal substrates: Epitaxy and growth; Heterogeneous catalysis; Surface chemical reactions; Ab-initio approaches to excitations in condensed matter; Organic, polymeric, biomolecular films– also with adsorbates; Particles and clusters)
O 42.82: Poster
Mittwoch, 25. März 2009, 17:45–20:30, P2
Adsorption Geometry and Molecular Orbital Structure of Fluorinated Cobalt Phthalocyanine (F16CoPc) Layers on HOPG Substrate. — •Mahmoud Abdel-Hafiez1, Marius Toader1, Thiruvancheril G.Gopakumar2, Afshin Abbasi1, and Michael Hietschold1 — 1Solid Surfaces Analysis Group and Theoretical Physics Group, Institute of Physics, Chemnitz University of Technology, D-09107,-Chemnitz, Germany — 2Christian-Albrechts-Universität zu Kiel, Institute of Experimental and Applied Physics, D-24118 Kiel, Germany
The adsorption geometry and electronic structure of isolated fluorinated Cobalt Phthalocyanine (F16CoPc) molecules adsorbed on the basal plane of HOPG (highly oriented pyrolytic graphite) substrate was studied. Monolayers were prepared using organic molecular beam epitaxy (OMBE) under UHV conditions at room temperature and investigated at 40 K using an Omicron VT-STM. At a thickness of around one monolayer, F16CoPc forms perfect quadratic phase superstructures on HOPG films. Adsorption geometry of molecules within the adlayer shows the influence of fluorine atoms on the packing. Single molecule calculations are employed to understand the type of interactions between F16CoPc and the substrate, as well as the effects of fluorine atoms on the geometric configurations of the adsorbed F16CoPc molecules.