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

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.

14 pages, 5 figures and 2 tables

References in corpus (6)

• DNA-decorated carbon nanotubes for chemical sensing
• Time-Dependent Transport through a Mesoscopic Structure
• DNA-decorated graphene chemical sensors
• First-principles Study of Physisorption of Nucleic Acid Bases on Small-Diameter Carbon Nanotube
• Adiabatic Charge Pumping through Quantum Dots in the Coulomb Blockade Regime
• Current correlation functions for chemical sensors based on DNA decorated carbon nanotube