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 42.56: Poster

Mittwoch, 25. März 2009, 17:45–20:30, P2

Organic and Metal-Organic Networks Based on NC - Ph - CN — •Matthias Marschall¹, Joachim Reichert¹, Willi Auwärter¹, Knud Seufert¹, Florian Klappenberger¹, Svetlana Klyatsakya², Mario Ruben², Alexander Weber-Bargioni³, and Johannes V. Barth¹ — ¹Physik Department, TU München, Germany — ²Institut für Nanotechnologie, Karlsruhe, Germany — ³Department of Physics and Astronomy, University of British Columbia, Vancouver, Canada

The assembly of metal-organic networks is a promising method to fabricate well defined, highly stable supramolecular nanostructures. We investigated the molecular structures by means of Scanning Tunneling Microscopy (STM) and Near Edge X-ray Adsorption Fine Structure (NEXAFS). A systematic investigation of such a metal organic network on Ag(111) and Cu(111) revealed several highly ordered and complex networks. The complexity and the variety of the observed molecular networks is presumably caused by the numerous degrees of freedom of the investigated molecules. Upon absorption the molecules obtain a surface induced chirality and their supramolecular assemblies were studied in dependence of the coverage and preparation parameters. At certain conditions even highly stable macromolecules were formed.