Influence of counter-ion-induced disorder in DNA conduction

Adessi, Ch.; Anantram, M. P.
April 2003
Applied Physics Letters;4/7/2003, Vol. 82 Issue 14, p2353
Academic Journal
Disorder along a DNA strand due to nonuniformity associated with the counter ion type and location, and in rise and twist are investigated using density functional theory. We then model the conductance through a poly(G) DNA strand by including the influence of disorder. We show that the conductance drops by a few orders of magnitude between typical lengths of 10 and 100 nm. Such a decrease occurs with on-site potential disorder that is larger than 100 meV.


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