Danilov, Andrey and Kubatkin, Sergey and Kafanov, Sergey and Hedegard, Per and Stuhr-Hansen, Nicolai and Moth-Poulsen, Kasper and Bjornholm, Thomas (2008) Electronic transport in single molecule junctions: Control of the molecule-electrode coupling through intramolecular tunneling barriers. NANO LETTERS, 8 (1). pp. 1-5.
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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl071228o
We report on single molecule electron transport measurements of two oligophenylenevinylene (OPV3) derivatives placed in a nanogap between gold (Au) or lead (Pb) electrodes in a field effect transistor device. Both derivatives contain thiol end groups that allow chemical binding to the electrodes. One derivative has additional methylene groups separating the thiols from the delocalized pi-electron system. The insertion of methylene groups changes the open state conductance by 3-4 orders of magnitude and changes the transport mechanism from a coherent regime with finite zero-bias conductance to sequential tunneling and Coulomb blockade behavior.
|Subjects:||Material Science > Tunnelling and microscopic phenomena|
Engineering > Nanotechnology applications in ICT
|Deposited On:||07 Sep 2009 12:33|
|Last Modified:||07 Sep 2009 12:33|
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