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Room temperature negative differential resistance of a monolayer molecular rotor device

Xue, Mei and Kabehie, Sanaz and Stieg, Adam Z. and Tkatchouk, Ekaterina and Benitez, Diego and Stephenson, Rachel M. and Goddard, William A. and Zink, Jeffrey I. and Wang, Kang L. (2009) Room temperature negative differential resistance of a monolayer molecular rotor device. Applied Physics Letters, 95 (9). Art. No. 093503. ISSN 0003-6951.

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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.

Item Type:Article
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Goddard, William A.0000-0003-0097-5716
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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Research CorporationUNSPECIFIED
Subject Keywords:copper compounds; density functional theory; electrodes; gold; molecular electronics; monolayers; negative resistance; oxidation; reduction (chemical); rotors; silicon
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Issue or Number:9
Classification Code:PACS: 85.65.+h Molecular electronic devices, 73.61.Ng Electrical properties of insulators (thin films), 72.20.Ht High-field transport and nonlinear effects (semiconductors/insulators)
Record Number:CaltechAUTHORS:20090923-143137602
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Official Citation:Room temperature negative differential resistance of a monolayer molecular rotor device Mei Xue, Sanaz Kabehie, Adam Z. Stieg, Ekaterina Tkatchouk, Diego Benitez, Rachel M. Stephenson, William A. Goddard, Jeffrey I. Zink, and Kang L. Wang, Appl. Phys. Lett. 95, 093503 (2009), DOI:10.1063/1.3222861
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16034
Deposited By: George Porter
Deposited On:02 Oct 2009 17:26
Last Modified:03 Oct 2019 01:06

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