115 Scopus citations

Abstract

We have studied electron transport through single redox molecules, perylene tetracarboxylic diimides, covalently bound to two gold electrodes via different linker groups, as a function of electrochemical gate voltage and temperature in different solvents. The conductance of these molecules is sensitive to the linker groups because of different electronic coupling strengths between the molecules and electrodes. The current through each of the molecules can be controlled reversibly over 2-3 orders of magnitude with the gate and reaches a peak near the redox potential of the molecules. The similarity in the gate effect of these molecules indicates that they share the same transport mechanism. The temperature dependence measurement indicates that the electron transport is a thermally activated process. Both the gate effect and temperature dependence can be qualitatively described by a two-step sequential electron-transfer process.

Original languageEnglish (US)
Pages (from-to)11535-11542
Number of pages8
JournalJournal of the American Chemical Society
Volume129
Issue number37
DOIs
StatePublished - Sep 19 2007

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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    Li, X., Hihath, J., Chen, F., Masuda, T., Zang, L., & Tao, N. (2007). Thermally activated electron transport in single redox molecules. Journal of the American Chemical Society, 129(37), 11535-11542. https://doi.org/10.1021/ja072990v