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Measurement of Single-Molecule Resistance by Repeated Formation of Molecular Junctions
Abstract
The conductance of a single molecule connected to two gold electrodes was determined by repeatedly forming thousands of gold-molecule-gold junctions. Conductance histograms revealed well-defined peaks at integer multiples of a fundamental conductance value, which was used to identify the conductance of a single molecule. The resistances near zero bias were 10.5 ± 0.5, 51 ± 5, 630 ± 50, and 1.3 ± 0.1 megohms for hexanedithiol, octanedithiol, decanedithiol, and 4,4′ bipyridine, respectively. The tunneling decay constant (β N ) for N -alkanedithiols was 1.0 ± 0.1 per carbon atom and was weakly dependent on the applied bias. The resistance and β N values are consistent with first-principles calculations.
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Metadata
- Authors
- Xu, B., & Tao, N. J.
- Venue
- Science
- Published
- 2003-08-29
- Volume
- 301
- Issue
- 5637
- Pages
- 1221-1223
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2035794494
- Cited by
- 2,353
- References
- 0
- FWCI
- 67.04
- Type
- journal article
- Language
- en
- Open access
- closed
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