Berlin 2008 – scientific programme

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O: Fachverband Oberflächenphysik

O 59: Molecular Nanostructures

O 59.1: Talk

Thursday, February 28, 2008, 09:30–09:45, MA 041

Organic Molecular Nanowires: N,N’-dimethylperylene-3,4,9,10-bis(dicarboximide) on KBr(001) and NaCl(001) — •Markus Fendrich, Christian Weiss, Manfred Lange, Tobias Kunstmann, and Rolf Möller — Fachbereich Physik, Universität Duisburg-Essen, D-47048 Duisburg

The growth of N,N’-dimethylperylene-3,4,9,10-bis(dicarboximide) (DiMe-PTCDI) on KBr(001) [1] and NaCl(001) has been studied by frequency modulation atomic force microscopy. On both substrates, DiMe-PTCDI forms molecular wires with a length of up to 600 nm at low coverages. The height of the wires is two or more molecular layers; all wires grow along the [110] and [110] direction of the alkali halide (001) substrates. There is no wetting layer of molecules: Atomic resolution of the substrates can be achieved between the wires. Due to their size and shape, the molecular nanowires might act as a model system for organic electronics research on insulating substrates. Calculations using empirical potentials reveal possible growth mechanisms for both substrates.

[1] M. Fendrich and T. Kunstmann, Appl. Phys. Lett. 91, 023101 (2007)