Jin He et al 2005 Nanotechnology 16 695 doi:10.1088/0957-4484/16/6/012
Jin He1, Fan Chen1, Paul A Liddell2, Joakim Andréasson2, Stephen D Straight2, Devens Gust2, Thomas A Moore2, Ana L Moore2, Jun Li1, Otto F Sankey1 and Stuart M Lindsay1,2,3
Show affiliationsWe have studied the electronic changes caused by light-induced isomerization of a photochromic molecule between an open state (that absorbs in the UV to become closed) and a closed state (that absorbs in the visible to become open). Data obtained using a newly developed repetitive break junction method are interpreted in terms of single-molecule resistances of 526 ± 90 MΩ in the open form and 4 ± 1 MΩ in the closed form when the molecule is bound between two gold contacts via dithiol linkages. The corresponding ratio of open to closed resistance is in close agreement with the results of ab initio calculations, though the measured resistances are about half of the calculated values. Optical spectroscopy indicates that the photoisomerization occurs in both directions on small gold particles, evaporated thin gold films, and in the break junction experiments. http://stacks.iop.org/0957-4484/16/695
78.20.-e Optical properties of bulk materials and thin films
Issue 6 (June 2005)
Received 10 November 2004, in final form 23 February 2005
Published 5 April 2005
Jin He et al 2005 Nanotechnology 16 695
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