Electronic Conduction in Short DNA Wires

Details Electronic Conduction in Short DNA Wires Electronic Conduction in Short DNA Wires

2002-12-11

arxiv.org/abs/cond-mat/0212241v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 2 figure

Scientific paper

A strict method is used to calculate the current-voltage characteristics of a double-stranded DNA. A more reliable model considering the electrostatic potential drop along an individual DNA molecular wire between the contacts is considered and the corresponding Green's Function is obtained analytically using Generating Function method, which avoids difficult numerical evaluations. The obtained results indicate that the electrostatic drop along the wire always increases the conductor beyond the threshold than without considering it, which is in agreement with recent experiments. The present method can also be used to calculate the current-voltage characteristics for other molecular wires of arbitrary length.

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