Regensburg 2002 – wissenschaftliches Programm

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SYOH: Organische Halbleiter

SYOH 7: Poster

SYOH 7.1: Poster

Montag, 11. März 2002, 18:00–21:00, C

Characterization of the Growth of Perylene on Single Crystal Copper Surfaces — •Kathrin Hänel, Alexander Birkner, and Christof Wöll — Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, Universitätsstr. 150, 44780 Bochum

The adsorption of perylene (C₂₀H₁₂) on Cu(110) and Cu(111) was investigated with STM, LEED and XPS under UHV conditions. An effusion cell was used for the evaporation of the organic molecule, the flux was checked using a quartz crystal microbalance. In the case of the Cu(110) substrate we were able to image organic films with a thickness ranging from the submonolayer regime to multilayers with thicknesses exceeding 5 nm. An epitaxial growth of perylene was observed, leading to the formation of highly ordered organic films. In the monolayer regime ordered molecular chains orientated along the [1-10] direction of the Cu(110) substrate were observed. The results for the Cu(111)-surface reveal a significantly different behavior. In addition to STM, LEED and XPS measurements we will present measurements using tunneling spectroscopy in connection with the STM.