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.