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Published August 31, 2009 | Published
Journal Article Open

Room temperature negative differential resistance of a monolayer molecular rotor device

Abstract

An electrically driven molecular rotor device comprised of a monolayer of redox-active ligated copper compounds sandwiched between a gold electrode and a highly doped P+Si substrate was fabricated. Current-voltage spectroscopy revealed a temperature-dependent negative differential resistance (NDR) associated with the device. Time-dependent density functional theory suggests the source of the observed NDR to be redox-induced ligand rotation around the copper metal center, an explanation consistent with the proposed energy diagram of the device. An observed temperature dependence of the NDR behavior further supports this hypothesis.

Additional Information

©2009 American Institute of Physics. Received 17 June 2009; accepted 12 August 2009; published 2 September 2009. The authors would like to thank the FCRP-FENA center for support.

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August 21, 2023
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