Thermally activated electron transport in single redox molecules

Xiulan Li, Joshua Hihath, Fang Chen, Takuya Masuda, Ling Zang, Nongjian Tao

Research output: Contribution to journalArticlepeer-review

126 Scopus citations


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
Issue number37
StatePublished - Sep 19 2007

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


Dive into the research topics of 'Thermally activated electron transport in single redox molecules'. Together they form a unique fingerprint.

Cite this