Interplay of electric fields and strain effects on charge transport through DNA molecules

ORAL

Abstract

The combination of electric field effect and small mechanical strain perturbations is studied in the electron transport calculations of the poly(G)-poly(C) double-stranded (ds) DNA molecular electronic structure. We use an advanced two-dimensional tight-binding model including hopping integrals of the next nearest-neighbors and the implementation of strain-dependent DNA helix conformation in conjunction with the theories of Slater-Koster and linear elasticity. Determining on-site energies of each base and coupling parameters based on these effects, the transport properties of a 30 base-pair ds-DNA molecule tilted with respect to the inter-contact electric field direction with a mechanical strain are investigated. Specifically, we present single electron transmission spectra and current-voltage characteristics as functions of electron energy and source-drain voltage for both selected tilted angles and percentage strains.

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Authors

  • Yong Joe

    Ball State University

  • Don Anderson

    Univ of Michigan - Ann Arbor, The University of Texas at Dallas, Ball State University, Department of Physics, Kettering University, Institute of Physics, University of Brasilia, Brazil, Department of Chemistry and Biochemistry, Kettering University, Center for Photovoltaics Innovation and Commercialization (PVIC), Department of Physics and Astronomy, University of Toledo, Univ of Toledo, Department of Physics, Sri Venkateswara University,Tirupati-517 502, Universidad de La Habana, Ohio State Univ - Columbus, Miami University, Physical Therapy, Eastern Michigan University, Physics, Cleveland State University, Youngstown State Univ, Department of Mechanical Engineering, Youngstown State University, Student

  • Don Anderson

    Univ of Michigan - Ann Arbor, The University of Texas at Dallas, Ball State University, Department of Physics, Kettering University, Institute of Physics, University of Brasilia, Brazil, Department of Chemistry and Biochemistry, Kettering University, Center for Photovoltaics Innovation and Commercialization (PVIC), Department of Physics and Astronomy, University of Toledo, Univ of Toledo, Department of Physics, Sri Venkateswara University,Tirupati-517 502, Universidad de La Habana, Ohio State Univ - Columbus, Miami University, Physical Therapy, Eastern Michigan University, Physics, Cleveland State University, Youngstown State Univ, Department of Mechanical Engineering, Youngstown State University, Student