Regensburg 2007 – scientific programme

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O: Fachverband Oberflächenphysik

O 41: Metal Substrates: Adsorption II

O 41.4: Talk

Wednesday, March 28, 2007, 16:30–16:45, H39

Temperature programmed desorption of oligopyridine molecules on HOPG — •Michael Roos, Harry E. Hoster, and R. Jürgen Behm — Institut für Oberflächenchemie und Katalyse, Universität Ulm, 89069 Ulm

As shown in previous STM studies, bis(terpyridine)derivatives (BTP) form highly ordered hydrogen bonded networks on HOPG at the solid/liquid and the solid/gas interface. A reliable method to attain these monolayer networks in UHV is vapor deposition, followed by the desorption of excess material. In this study, we systematically investigate the thermal desorption behavior for varying initial BTP coverage. For a comprehensive understanding, the experimental spectra are compared with spectra attained by simulations based on different models, and are in addition linked to STM images of BTP layers on HOPG with different coverage.