A molecular switch based on potential-induced changes of oxidation state

Fan Chen; Jin He; Colin Nuckolls; Tucker Roberts; Jennifer E. Klare; Stuart Lindsay

doi:10.1021/nl0478474

A molecular switch based on potential-induced changes of oxidation state

Fan Chen, Jin He, Colin Nuckolls, Tucker Roberts, Jennifer E. Klare, Stuart Lindsay

Research output: Contribution to journal › Article › peer-review

252 Scopus citations

Abstract

We have measured the conductance of a hepta-aniline oligomer attached to gold electrodes held under potential control in electrolyte. It increases fifteen-fold (to 5.3±0.4 nS) on oxidation from the leucoemeraldine form to the emeraldine salt. The single-molecule current-voltage characteristic, linear in toluene, displays negative differential resistance in an acidic electrolyte. The negative differential resistance is accounted for by modification of the local surface potential by the applied bias. These results connect electrochemical data directly to molecular electronic behavior in a two-terminal device.

Original language	English (US)
Pages (from-to)	503-506
Number of pages	4
Journal	Nano Letters
Volume	5
Issue number	3
DOIs	https://doi.org/10.1021/nl0478474
State	Published - Mar 1 2005

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl0478474

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abstract = "We have measured the conductance of a hepta-aniline oligomer attached to gold electrodes held under potential control in electrolyte. It increases fifteen-fold (to 5.3±0.4 nS) on oxidation from the leucoemeraldine form to the emeraldine salt. The single-molecule current-voltage characteristic, linear in toluene, displays negative differential resistance in an acidic electrolyte. The negative differential resistance is accounted for by modification of the local surface potential by the applied bias. These results connect electrochemical data directly to molecular electronic behavior in a two-terminal device.",

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AU - He, Jin

AU - Nuckolls, Colin

AU - Roberts, Tucker

AU - Klare, Jennifer E.

AU - Lindsay, Stuart

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N2 - We have measured the conductance of a hepta-aniline oligomer attached to gold electrodes held under potential control in electrolyte. It increases fifteen-fold (to 5.3±0.4 nS) on oxidation from the leucoemeraldine form to the emeraldine salt. The single-molecule current-voltage characteristic, linear in toluene, displays negative differential resistance in an acidic electrolyte. The negative differential resistance is accounted for by modification of the local surface potential by the applied bias. These results connect electrochemical data directly to molecular electronic behavior in a two-terminal device.

AB - We have measured the conductance of a hepta-aniline oligomer attached to gold electrodes held under potential control in electrolyte. It increases fifteen-fold (to 5.3±0.4 nS) on oxidation from the leucoemeraldine form to the emeraldine salt. The single-molecule current-voltage characteristic, linear in toluene, displays negative differential resistance in an acidic electrolyte. The negative differential resistance is accounted for by modification of the local surface potential by the applied bias. These results connect electrochemical data directly to molecular electronic behavior in a two-terminal device.

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A molecular switch based on potential-induced changes of oxidation state

Abstract

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