Regensburg 2016 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 92: Postersession DS/HL

HL 92.29: Poster

Donnerstag, 10. März 2016, 16:00–19:00, Poster A

Adsorption study of terephthalic and benzoic acids on HOPG with Metastable Induced Electron Spectroscopy (MIES) — •Marcel Marschewski¹, Harun Tas², Christian F. Otto², Wolfgang Maus-Friedrichs¹, Andreas Schmidt², and Oliver Höfft³ — ¹Institut für Energieforschung und Physikalische Technologien, Technische Universität Clausthal, Deutschland — ²Institut für Organische Chemie, Technische Universität Clausthal, Deutschland — ³Institut für Elektrochemie, Technische Universität Clausthal, Deutschland

The adsorption behavior of benzoic acids on conducting interfaces like HOPG is of high interest for the understanding of the building mechanism of 2D and 3D frameworks on surfaces. Thus, the knowledge about the molecular orientation and the molecule-substrate interaction is of great importance. Here we present our results on the adsorption of 4-substituted benzoic acids (R = hydroxy-, methoxy-, propoxy-, pentyloxy- and decyloxy-chains) and terephthalic acid (TPA) on HOPG. The molecular films were studied with Metastable Induced Electron Spectroscopy (MIES) and Ultraviolet Photoelectron Spectroscopy (UPS(HeI)). For the TPA monolayer we find hints for a more planar orientation of the molecules. The benzoic acid molecules show a similar adsorption behavior on HOPG. For the 4-(decyloxy) benzoic acid we assume a possible reorientation of the alkyl chains after the first monolayer.