Thickness and low-temperature conductivity of DNA molecules

Kasumov, A. Yu.; Klinov, D.V.; Roche, P.-E.; Guéron, S.; Bouchiat, H.
February 2004
Applied Physics Letters;2/9/2004, Vol. 84 Issue 6, p1007
Academic Journal
We argue that interaction between molecules and substrate is a key parameter which determines the conducting or insulating behavior of DNA molecules. In this letter, we show that strongly deformed DNA molecules deposited on a substrate, whose thickness is less than half the native thickness of the molecule, are insulating, whereas molecules keeping their native thickness are conducting down to very low temperature with a non-ohmic behavior characteristic of a 1D conductor with repulsive electron–electron interactions. © 2004 American Institute of Physics.


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