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.
@article{arxiv.cond-mat/0605609,
title = {Three-terminal devices to examine single molecule conductance switching},
author = {Z. K. Keane and J. W. Ciszek and J. M. Tour and D. Natelson},
journal= {arXiv preprint arXiv:cond-mat/0605609},
year = {2007}
}
Comments
5 pages, 4 figures. Supporting material available upon request