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- Title
Reproducible measurement of single-molecule conductivity.
- Authors
Cui, X D; Primak, A; Zarate, X; Tomfohr, J; Sankey, O F; Moore, A L; Moore, T A; Gust, D; Harris, G; Lindsay, S M
- Abstract
A reliable method has been developed for making through-bond electrical contacts to molecules. Current-voltage curves are quantized as integer multiples of one fundamental curve, an observation used to identify single-molecule contacts. The resistance of a single octanedithiol molecule was 900 +/- 50 megohms, based on measurements on more than 1000 single molecules. In contrast, nonbonded contacts to octanethiol monolayers were at least four orders of magnitude more resistive, less reproducible, and had a different voltage dependence, demonstrating that the measurement of intrinsic molecular properties requires chemically bonded contacts.
- Publication
Science (New York, N.Y.), 2001, Vol 294, Issue 5542, p571
- ISSN
0036-8075
- Publication type
Journal Article
- DOI
10.1126/science.1064354