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Open Access Special Issue Article

Polaron Hopping in Nano-scale Poly(dA)–Poly(dT) DNA

Mahi R Singh, Graeme Bart* and Martin Zinke-Allmang

Author Affiliations

Department of Physics and Astronomy, The University of Western Ontario, London, ON, N6A 3K7, Canada

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Nanoscale Research Letters 2010, 5:501-504  doi:10.1007/s11671-010-9548-7

Published: 4 February 2010


We investigate the current–voltage relationship and the temperature-dependent conductance of nano-scale samples of poly(dA)–poly(dT) DNA molecules. A polaron hopping model has been used to calculate the I–V characteristic of nano-scale samples of DNA. This model agrees with the data for current versus voltage at temperatures greater than 100 K. The quantities G0, i0, and T1d are determined empirically, and the conductivity is estimated for samples of poly(dA)–poly(dT).

DNA; Polaron hopping; Semiconductor