Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 101: Transport - Poster Session
TT 101.16: Poster
Donnerstag, 3. April 2014, 15:00–19:00, P2
Electrical Characterization of a Switchable Molecular Wire via Mechanically Controllable Break Junctions — •Torsten Sendler1, Matthias Wieser1, Jannic Wolf2, Thomas Huhn2, Elke Scheer2, Francesca Moresco3, Jochen Grebing1, and Artur Erbe1 — 1Helmholtz-Zentrum Dresden-Rossendorf, Germany — 2University of Konstanz, Germany — 3Max Bergmann Center of Biomaterials, Dresden, Germany
Molecular electronics has been a field of big interest for the last years. Using the technique of mechanically controllable break junctions we characterize the Switchable Molecular Wire Oligo(phenylene ethynylene)-embedded Difurylperfluorocyclopentenes (SMW) in liquid environment. Via light irradiation the SMW can be switched between two well-defined conductance states.
Conductance and hysteresis measurements allow us to identify the two states providing the basis for a comprehensive study of the in situ switching process. Based on the analysis with the transport model assuming transport through a single molecular level, we confirm that a reliable contact of the molecules to the gold contacts is formed and extract the energy of the molecular levels and the coupling constants between molecule and electrodes.