Regensburg 2013 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 21: Transport: Molecular Electronics (joint session TT/CPP/HL/MA)

CPP 21.2: Talk

Wednesday, March 13, 2013, 09:45–10:00, H2

Electrical Characterization of Single Molecules via MCBJ — •Matthias Wieser¹, Torsten Sendler¹, Shou-Peng Liu², Samuel Weisbrod², Zhuo Tang², Andreas Marx², Jannic Wolf², Elke Scheer², Francesca Moresco³, Grebing Jochen¹, and Artur Erbe¹ — ¹Helmholtz-Zentrum Dresden-Rossendorf e.V., D-01328 Dresden — ²Universität Konstanz, D-78457 Konstanz — ³Max Bergmann Center of Biomaterials, D-01069 Dresden

For future molecular electronics applications the detailed knowledge about the electrical transport properties of single molecules is very important. To achieve this goal we are using the mechanical controllable break junction technique in liquid environments in combination with insulating substrates. We characterize the electrical conductance and I-V characteristics of single molecules which consist of three phenyl rings connected by triple carbon bonds with two oxygen sidegroups binding to the central ring. The I-V characteristics are further investigated by creating 2D histograms for hundreds of I-V curves and by fitting a single level model which provides us the metal-molecule junction coupling constants and the molecular energy level.