Optical modulation of molecular conductance

Shreya Battacharyya, Ashley Kibel, Gerdenis Kodis, Paul A. Liddell, Miguel Gervaldo, Devens Gust, Stuart Lindsay

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)


A novel scanning probe microscope stage permits break junction measurements of single molecule conductance while the molecules are illuminated with visible light. We studied a porphyrin-fullerene dyad molecule designed to form a charge separated state on illumination. A significant fraction of illuminated molecules become more conductive, returning to a lower conductance in the dark, suggesting the formation of a long-lived charge separated state on the indium-tin oxide surface. Transient absorption spectra of these molecular layers are consistent with formation of a long-lived charge separated state, a finding with implications for the design of molecular photovoltaic devices.

Original languageEnglish
Pages (from-to)2709-2714
Number of pages6
JournalNano letters
Issue number7
Publication statusPublished - Jul 13 2011


  • Molecular electronics
  • charge-separated states
  • indium tin oxide
  • molecular photovoltaics
  • optoelectronics

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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