Electronic transport in DNA.

  title={Electronic transport in DNA.},
  author={Daphne Klotsa and Rudolf A. R{\"o}mer and Matthew S. Turner},
  journal={Biophysical journal},
  volume={89 4},
We study the electronic properties of DNA by way of a tight-binding model applied to four particular DNA sequences. The charge transfer properties are presented in terms of localization lengths (crudely speaking, the length over which electrons travel). Various types of disorder, including random potentials, are employed to account for different real environments. We have performed calculations on poly(dG)-poly(dC), telomeric-DNA, random-ATGC DNA, and lambda-DNA. We find that random and lambda… 
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Structural and dynamical disorder and charge transport in DNA
  • Wei Zhang, S. Ulloa
  • Physics
    Microelectron. J.
  • 2004
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It is concluded that electrical transport is feasible in short DNA molecules, in bundles and networks, but blocked in long single molecules that are attached to surfaces.
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The fundamental mechanisms of charge migration in DNA are pertinent for current developments in molecular electronics and electrochemistry-based chip technology and electron transport is expected to be nearly sequence independent because of the similarity of the reduction potentials of the thymine and of the cytosine.
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This model provides a correct description of the molecular resonances which determine the quasi-linear part of the current out of the gap region and is in a good agreement with the recent finding of semiconducting behavior in short poly(G)-poly(C) DNA oligomers.
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Direct measurement of electrical transport through DNA molecules
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