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Gating of single molecule transistors: Combining field-effect and chemical control

J. Chem. Phys. 128, 154706 (2008); doi:10.1063/1.2897425

Published 16 April 2008

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Trilisa M. Perrine, Ron G. Smith, Christopher Marsh, and Barry D. Dunietz
Department of Chemistry, The University of Michigan, Ann Arbor, Michigan 48109, USA
Previously we have demonstrated that several structural features are crucial for the functionality of molecular field-effect transistors. The effect of additional structural aspects of molecular wires is explored. These include the type of, the thiol binding location on, and the chemical substitutions of a conjugated system. Pentacene, porphyrin, and the Tour–Reed devices are utilized as model systems. The thiol binding location is shown to have a varied effect on the transmission of a system depending on the molecular orbitals involved. Substitution by electron withdrawing and donating groups is illustrated to have a substantial effect on the transmission of single molecule devices. The substitution effect is either a simple energy shifting effect or a more complicated resonance effect, and can be used to effectively tune the electronic behavior of a single molecule field effect transistor. ©2008 American Institute of Physics
History: Received 19 October 2007; accepted 20 February 2008; published 16 April 2008
Permalink: http://link.aip.org/link/?JCPSA6/128/154706/1
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KEYWORDS and PACS

Keywords
PACS
  • 85.65.+h
    Molecular electronic devices
  • 85.30.Tv
    Semiconductor field effect devices
  • YEAR: 2008

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0021-9606 (print)   1089-7690 (online)
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