Regensburg 2013 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Organic films and electronics, photoorganics; Nanostructures; Plasmonics and nanooptics, Surface chemical reactions and heterogeneous catalysis, Surface dynamics )

O 36.1: Poster

Dienstag, 12. März 2013, 18:15–21:45, Poster B2

Molecular Junctions Using Epitaxial Monolayer Graphene Electrodes — •Konrad Ullmann, Daniel Waldmann, Stefan Ballmann, and Heiko Weber — Lehrstuhl für Angewandte Physik, Universität Erlangen-Nürnberg, Germany

We report on a method to fabricate epitaxial monolayer graphene electrodes with nanometer separation grown on silicon carbide. The nanometer-gap is formed by feedback controlled electroburning of carbon atoms in presence of oxygen. A gapsize of approximately 1nm is extracted from the tunneling current.

Using these gaps we are able to form molecular junctions. Subsequently I-V measurements of a molecule possessing fullerene anchor groups exhibit prominent peaks in differential conductance, which is typical for single-molecule junctions.