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arXiv 0811.0656cond-mat.mtrl-scicond-mat.mes-hall
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气流对DNA修饰碳纳米管电子输运的影响

Effect of gas flow on electronic transport in a DNA-decorated carbon nanotube

P. Poonam, N. Deo

摘要:

利用Gas-DNA修饰的碳纳米管场效应晶体管的电流-时间特性实验数据,计算了二次电流关联函数。关联函数的模式是传感器的灵敏度和选择性的量度,并且表明这些气流传感器也可以用作DNA序列检测器。该系统是由一个一维紧束缚的哈密顿量建模,我们提出了分析计算的量子电子输运的系统使用时间相关的非平衡格林函数形式主义和绝热膨胀。计算对电流$I^{(0)}(\bar{t})$和$I^{(1)}(\bar{t})$的零阶和一阶贡献,其中$I^{(0)} (\bar{t})$是Landauer公式。然后使用随时间变化的电流公式将理论结果与实验进行比较。

英文摘要:

We calculate the two-time current correlation function using the experimental data of the current-time characteristics of the Gas-DNA-decorated carbon nanotube field effect transistor. The pattern of the correlation function is a measure of the sensitivity and selectivity of the sensors and suggest that these gas flow sensors may also be used as DNA sequence detectors. The system is modelled by a one-dimensional tight-binding Hamiltonian and we present analytical calculations of quantum electronic transport for the system using the time-dependent nonequilibrium Green's function formalism and the adiabatic expansion. The zeroth and first order contributions to the current $I^{(0)}(\bar{t})$ and $I^{(1)}(\bar{t})$ are calculated, where $I^{(0)} (\bar{t})$ is the Landauer formula. The formula for the time-dependent current is then used to compare the theoretical results with the experiment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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