Direct current hopping conductance along DNA chain |
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Authors: | Ma Song-Shan Xu Hui Liu Xiao-Liang and Li Ming-Jun |
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Institution: | School of Physics and Technology, Central South University, Changsha 410083, China |
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Abstract: | This paper proposes a model of direct current (DC) electron hopping
transport in DNA, in which DNA is considered as a binary
one-dimensional disordered system. To quantitatively study the DC
conductivity in DNA, it numerically calculates the DC conductivity
of DNA chains with different parameter values. The result shows that
the DC conductivity of DNA chain increases with the increase of
temperature. And the conductivity of DNA chain is depended on the
probability p, which represents the degree of compositional
disorder in a DNA sequence to some extent. For p<0.5, the
conductivity of DNA chain decreases with the increase of p, while
for p\geq0.5, the conductivity increases with the increase of p.
The DC conductivity in DNA chain also varies with the change of the
electric field, it presents non-Ohm's law conductivity
characteristics. |
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Keywords: | DNA chain hoping transport DC conductivity compositional disorder |
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