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Science 19 October 2001:
Vol. 294. no. 5542, p. 473
DOI: 10.1126/science.294.5542.473e
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This Week in Science

Studies of single-molecule conductivity yield a wide range of values, in part because of the difficulties of making reliable contacts to individual molecules. Cui et al. (p. 571; see the Perspective by Hipps) now describe a method for covalently attaching gold nanoparticles to alkane thiol molecules self-assembled on a gold surface. Current-voltage curves are observed that can be attributed to making contact with one to five molecules, and these scale as multiples of the single contact curve. The results are with a factor of 6 of the theoretically expected conductivity.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)