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arXiv · 0811.0656

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

P. Poonam·N. Deo
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Abstract

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.

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P. Poonam, N. Deo. 2011-03-21. Effect of gas flow on electronic transport in a DNA-decorated carbon nanotube. https://doi.org/10.1088/0957-4484%2F22%2F20%2F205201

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