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Three-Terminal Devices to Examine Single-Molecule Conductance Switching

Author(s):

Z. K. Keane, J. W. Ciszek, J. M. Tour, D. Natelson

Journal:

Nano Letters

Year:

2006

Volume:

6

Pages

1518-1521

DOI:

10.1021/nl061117+

Abstract:

We report electronic transport measurements of single-molecule transistor devices incorporating bipyridyl-dinitro oligophenylene-ethynylene dithiol (BPDN-DT), a molecule known to exhibit conductance switching in other measurement configurations. We observe hysteretic conductance switching in 8% of devices with measurable currents and find that dependence of the switching properties on gate voltage is rare when compared to other single-molecule transistor devices. This suggests that polaron formation is unlikely to be responsible for switching in these devices. We discuss this and alternative switching mechanisms.

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