Conductance of a biomolecular wire

Iris Visoly-Fisher, Kayvon Daie, Yuichi Terazono, Christian Herrero, Fernando Fungo, Luis Otero, Edgardo Durantini, Juana J. Silber, Leonides Sereno, Devens Gust, Thomas Moore, Ana Moore, Stuart Lindsay

Research output: Contribution to journalArticlepeer-review

80 Scopus citations


Carotenoids (Car) act as "wires" that discharge unwanted electrons in the reaction center of higher plants. One step in this "side-path" electron conduction is thought to be mediated by Car oxidation. We have carried out direct measurements of the conductance of single-Car molecules under potential control in a membrane-mimicking environment, and we found that when Car are oxidized conductance is enhanced and the electronic decay constant (β) is decreased. However, the neutral molecule may already be conductive enough to account for observed electron transfer rates.

Original languageEnglish (US)
Pages (from-to)8686-8690
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number23
StatePublished - Jun 6 2006


  • Carotenoid
  • Molecular electronics
  • Photosynthesis
  • Potential control
  • Single molecule

ASJC Scopus subject areas

  • General


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