Double-Chain Tight-Binding Model to Calculate Conductance of DNA

Qing Feng Zhang

doi:10.4028/www.scientific.net/AMR.900.316

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 900Double-Chain Tight-Binding Model to Calculate...

Double-Chain Tight-Binding Model to Calculate Conductance of DNA

Abstract:

In this thesis, aperiodic genomic DNA have weak charge transfer; the transmission coefficient of DNA with short period sequence does not seem to depend on the length, yet differently, the transmission pattern of aperiodic genomic DNA sequences strongly depends on the strand length. As the number of corresponding bases increases, fewer states will present good transmission ability, because aperiodic increasing bases make more backscattering; at low temperature, the transmission spectrum presents a higher number of transmitting states, due to a breaking of level degeneracy. At higher temperature, the number of transmitting states decreases; Small intrastrand hopping integral does not seem to diminish the transmission coefficient, but shrinks the location in the three-dimension figure. And the distribution of energy is concentrated.

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Periodical:

Advanced Materials Research (Volume 900)

Pages:

316-319

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.900.316

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Online since:

February 2014

Authors:

Qing Feng Zhang

Keywords:

Conductance, DNA, Temperature, Tight-Binding, Transmission Coefficient

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