The influence of polaron size on the conductivity of poly-DNA

Details The influence of polaron size on the conductivity of poly-DNA The influence of polaron size on the conductivity of poly-DNA

2007-09-07

arxiv.org/abs/0709.1146v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

The velocity of polaron migration in the long poly-DNA chain (~40 base pairs) in an applied electric field has been studied within a polaron model. We found that the polaron velocity strongly depends on the polaron size. A small polaron shows a slow propagation and strong tolerance to the electric field, while a large polaron is much faster and less stable with increasing electric field. Moreover, the conductance of the DNA molecule within the polaron model is found to be sensitive to structural disorders in the DNA geometry, but that dependence diminishes with increasing temperature.

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