Electronic Transport in Single Molecule Junctions: Control of the Molecule-Electrode Coupling through Intramolecular Tunneling Barriers
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- 作者：Andrey Danilov ; Sergey Kubatkin ; Sergey Kafanov ; Per Hedegå ; rd ; Nicolai Stuhr-Hansen ; Kasper Moth-Poulsen ; Thomas Bj
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- 刊名：Nano Letters
- 出版年：2008
- 出版时间：January 2008
- 年：2008
- 卷：8
- 期：1
- 页码：1 - 5
- 全文大小：173K
- 年卷期：v.8,no.1(January 2008)
- ISSN：1530-6992
文摘
We report on single molecule electron transport measurements of two oligophenylenevinylene (OPV3) derivatives placed in a nanogap betweengold (Au) or lead (Pb) electrodes in a field effect transistor device. Both derivatives contain thiol end groups that allow chemical binding tothe electrodes. One derivative has additional methylene groups separating the thiols from the delocalized 
-electron system. The insertion ofmethylene groups changes the open state conductance by 3-4 orders of magnitude and changes the transport mechanism from a coherentregime with finite zero-bias conductance to sequential tunneling and Coulomb blockade behavior.
-electron system. The insertion ofmethylene groups changes the open state conductance by 3-4 orders of magnitude and changes the transport mechanism from a coherentregime with finite zero-bias conductance to sequential tunneling and Coulomb blockade behavior.