Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 6: Scanning probe methods I
O 6.9: Vortrag
Montag, 26. März 2012, 12:30–12:45, MA 043
Electron transport studies through a single octanethiol molecule — •René Heimbuch, Avijit Kumar, Hairong Wu, Bene Poelsema, and Harold Zandvliet — Physics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, the Netherlands
Single molecules, used as functional electronic components define the field of molecular electronics. These molecules need to be contacted via electrodes to the macroscopic world. Previously, a single octanenthiol molecule was trapped between an STM tip and a substrate and the conductance was measured. In our work, we study the full transport through a single octanethiol molecule bridging the gap between the STM tip and the substrate. Control over the switching behavior of the molecule has been achieved through careful tuning of the electrodes’ interspace and voltage. For an electric field exceeding 4−6 · 109 V/m, the switch can be turned "ON". Once trapped, we also measure an increase in the conductance of the molecule upon compression. This method is used to investigate the transport properties of the molecule as function of temperature.