Conductance switching in single molecules through conformational changes

Z. J. Donhauser, B. A. Mantooth, K. F. Kelly, L. A. Bumm, J. D. Monnell, J. J. Stapleton, Jr Price, A. M. Rawlett, D. L. Allara, J. M. Tour, P. S. Weiss

Research output: Contribution to journalArticlepeer-review

1156 Scopus citations

Abstract

We tracked over time the conductance switching of single and bundled phenylene ethynylene oligomers isolated in matrices of alkanethiolate monolayers. The persistence times for isolated and bundled molecules in either the ON or OFF switch state range from seconds to tens of hours. When the surrounding matrix is well ordered, the rate at which the inserted molecules switch is low. Conversely, when the surrounding matrix is poorly ordered, the inserted molecules switch more often. We conclude that the switching is a result of conformational changes in the molecules or bundles, rather than electrostatic effects of charge transfer.

Original languageEnglish (US)
Pages (from-to)2303-2307
Number of pages5
JournalScience
Volume292
Issue number5525
DOIs
StatePublished - Jun 22 2001

All Science Journal Classification (ASJC) codes

  • General

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