Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: Poster Session II (Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: arrays; Nanostructures at surfaces: Wires, tubes; Nanostructures at surfaces: Other; Plasmonics and nanooptics; Metal substrates: Epitaxy and growth; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsoprtion of organic / bio molecules; Metal substrates: Adsoprtion of inorganic molecules; Metal substrates: Adsoprtion of O and/or H; Metal substrates: Clean surfaces; Density functional theory and beyond for real materials)
O 59.80: Poster
Mittwoch, 24. März 2010, 17:45–20:30, Poster B1
A photoelectron diffraction investigation of vanadyl phthalocyanine on Au(111) — David Duncan2, •Werner Unterberger1, Tsenolo J. Lerotholi2, Kirsty Hogan3, Christine Lamont3, and Phillip Woodruff1,2 — 1Fritz-Haber-Institute — 2Physics Department, University of Warwick — 3Deptartment of Chemical and Biological Sciences, University of Huddersfield
Scanned-energy mode photoelectron diffraction (PhD) is a well-established method to determine quantitatively the local structure of adsorbates at surfaces. Here we describe its application to adsorption of vanadyl phthalocyanine (VOPc) on Au(111) which was used as a model system for vanadyl species (V=O) on the clean V2O3 surface.
VOPc was dosed at 130∘C on the clean Au(111) surface and a coverage of approximately 0,015ML was reached which is half of that found by STM experiments (Hipps et. al.). O 1s and V 2p scanned-energy mode photoelectron diffraction has been used to investigate the adsorption structure of VOPc. The V=O vanadyl bond is found to point out of the surface with a bondlength of 1.60+-0.04 A. Relative to bulk VOPc, the V atom is pulled down into the approximately planar region defined by the N and C atoms by 0.52 (+0.14/-0.10) A.