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Published Online November 8, 2001
Science DOI: 10.1126/science.1066171

Reports

Submitted on September 12, 2001
Accepted on October 25, 2001

Field-Effect Modulation of the Conductance of Single Molecules

Jan Hendrik Schön 1*, Hong Meng 1, Zhenan Bao 1

1 Bell Laboratories, Lucent Technologies, 600 Mountain Avenue, Murray Hill, NJ 07974-0636, USA.

* To whom correspondence should be addressed. E-mail: hendrik{at}lucent.com.

Field-effect transistors based on two-component self-assembled monolayers of conjugated and insulating molecules have been prepared, the conductance through which can be varied by more than three orders of magnitude by changing the applied gate bias. Using very small ratios of conjugated to insulating molecules in the two-component monolayer, devices with only a few "electrically active" molecules can be achieved. At low temperatures the peak channel-conductance is quantized in units of 2e2/h. This behavior is indicative of transistor action in single molecules. Based on such single-molecule transistors inverter circuits with gain are demonstrated.


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