Effects of interfacial couplings on charge transport properties of DNA molecule

被引：5

作者：

Meng Xian-Lan ^{[1
]}

Gao Xu-Tuan ^{[3
]}

Qu Zhen ^{[1
]}

Kang, Da-Wei ^{[1
]}

Liu De-Sheng ^{[1
,2
]}

Xie Shi-Jie ^{[1
]}

机构：

[1] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

[2] Jining Univ, Dept Phys, Qufu 273155, Peoples R China

[3] Shandong Univ Technol, Sch Phys, Zibo 255049, Peoples R China

来源：

ACTA PHYSICA SINICA | 2008年 / 57卷 / 08期

基金：

中国国家自然科学基金;

关键词：

interfacial couplings; transmission coefficient; localization length; conductivity;

D O I：

10.7498/aps.57.5316

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using the three-dimensional tight-binding model and the matrix transfer method, effects of interfacial couplings on the charge transport properties of DNA Molecule have been studied. The result's indicate that when the interfacial couplings are ideal, both transmission coefficient and localization length of electrons are larger, the Molecule shows higher conductivity, while the ease is the contrary when the interfacial couplings are unideal. When the molecule and the metallic electrodes couple ideally, through voltage-current characteristic, it is found that the onset voltage of poly(dG)-poly(dC) DNA is lower than that for the poly(dA)-poly(dT) counterpart, and the Current of the former is larger than that of the latter under the same bias voltage, so the conductivity of poly(dG)-poly(dC) DNA is higher than that of the poly(dA)-poly(dT) counterpart.

引用

页码：5316 / 5322

页数：7

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