Band resonant tunneling in DNA molecules.
Band resonant tunneling in DNA molecules.
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DNA 分子中的带共振隧道效应。
DOI：
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发表时间：
2001
影响因子：
8.6
通讯作者：
S. Stafström
中科院分区：
文献类型：
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作者：
M. Hjort;S. Stafström
DNA中的电荷迁移过程目前在研究人员中引起了激烈的争论。我们对聚（G）-聚（C）DNA进行了计算，证实了最近的一份报告表明这种特殊形式的DNA具有带状导电。我们的研究结果表明，鸟嘌呤和胞嘧啶都产生了沿着DNA链的传导通道。电导率是由于π轨道沿基堆沿着重叠而产生的。我们还证明了在poly（G）-poly（C）DNA中测量到的阈值电压随温度的增加是由于高温后结构无序引起的电子局域化的结果。
The charge migration process in DNA is subject to a lively debate among researchers at the moment. We have performed calculations on poly(G)-poly(C) DNA which substantiate a recent report indicating bandlike conduction for this particular form of DNA. Our results show that both guanine and cytosine give rise to conducting channels along the DNA strands. The conductivity results from the overlap of the pi orbitals along the base stacks. We also demonstrate that the measured increase of the threshold voltage with temperature in poly(G)-poly(C) DNA is the result of electron localization due to the structural disorder following high temperature.