Berlin 2008 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 22: Transport: Poster Session
TT 22.49: Poster
Mittwoch, 27. Februar 2008, 14:00–18:00, Poster B
Conductance through Metal–Molecule Contacts in Solution — •Thomas Kirchner1, Uta Eberlein1, Simon Verleger1, Thomas Huhn2, Artur Erbe1, and Elke Scheer1 — 1FB Physik, Universität Konstanz, Germany — 2FB Chemie, Universität Konstanz, Germany
Lithographically defined Mechanically Controllable Break Junctions (MCBJ) are employed to establish metal-molecule contacts at room temperature. Using a liquid cell containing a molecule solution, and a solvent re-filling system the molecules are kept in a tetrahydrofuran-based solvent throughout the measurement. We investigate oligo phenylene ethynylenes (OPE) with various end groups including pyridine. The conductance can be measured while slowly varying the distance between the electrodes, thus revealing preferred conductance values by statistical analysis. Furthermore, current-voltage characteristics are determined at a constant distance.