Measuring reversible photomechanical switching rates for a molecule at a surface

Matthew J. Comstock, Niv Levy, Jongweon Cho, Luis Berbil-Bautista, Michael F. Crommie, Daniel A. Poulsen, Jean Frechet

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

We have used single-molecule-resolved scanning tunneling microscopy to measure the photomechanical switching rates of azobenzene-derived molecules at a gold surface during exposure to UV and visible light. This enables the direct determination of both the forward and reverse photoswitching cross sections for surface-mounted molecules at different wavelengths. In a dramatic departure from molecular behavior in solution-based environments, visible light does not efficiently reverse the reaction for azobenzene-derived molecules at a gold surface.

Original languageEnglish (US)
Article number123107
JournalApplied Physics Letters
Volume92
Issue number12
DOIs
StatePublished - Apr 3 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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