Measuring reversible photomechanical switching rates for a moleculeat a surface
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 sec...
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Veröffentlicht in: | Applied physics letters 2008-03, Vol.92 (12), p.123107-123107-3 |
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Zusammenfassung: | 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. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.2901877 |