Affiliation:
1. Department of Electrical Engineering and The Center for Solid State Electronics Research, Arizona State University, Tempe, AZ 85287, USA.
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.
Publisher
American Association for the Advancement of Science (AAAS)
Cited by
2163 articles.
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