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 14.56: Poster
Monday, March 27, 2006, 18:00–21:00, P2
2D oligopyridine networks on HOPG - solid/gas versus solid/liquid interface — •K. Tonigold1, A. Breitruck1, Ch. Meier2, U. Ziener2, H.E. Hoster1, K. Landfester2, and R.J. Behm1 — 1Department of Surface Chemistry and Catalysis, University of Ulm, D-89069 Ulm — 2Department of Macromolecular Chemistry and Organic Materials, University of Ulm, D-89069
Ordered 2D structures formed by oligopyridine compounds on HOPG have been studied by STM i) after vapor deposition of the molecules in UHV and ii) at the solid liquid interface in the presence of an organic solvent with the molecules dissolved in it. For both interfaces we find highly ordered networks stabilized by hydrogen bonds. In UHV, the structure geometry mainly depends on the coverage, which is easily varied via duration and rate of the deposition. At the solid-liquid interface, the structure is more easily varied via the choice of the utilized organic solvent. Similarities and differences between the structures at both interfaces are discussed, including the actual influence of the organic solvent on the structures and their formation.