Backbone-induced semiconducting behavior in short DNA wires

By Gianaurelio Cuniberti, L. Craco, D. Porath, Cees Dekker. 2002

179 citations recorded by the source corpus.

We propose a model Hamiltonian for describing charge transport through short homogeneous double stranded DNA molecules. We show that the hybridization of the overlapping $\pi$, orbitals in the base-pair stack coupled to the backbone is sufficient to predict the existence of a gap in the nonequilibrium current-voltage characteristics with a minimal number of parameters. Our results are in a good agreement with the recent finding of semiconducting behavior in short poly(G)-poly(C) DNA oligomers. In particular, our model provides a correct description of the molecular resonances which determine the quasi-linear part of the current out of the gap region.

Subfields: Electrical and Electronic Engineering, Molecular Biology

View Paper: https://www.semanticscholar.org/paper/7470a09ea83a3822c2727b66ff2ce4fc72816f87

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In Electrical and Electronic Engineering

In Molecular Biology

Citations in the corpus

Colloquium: The quest for high-conductance DNA (2004, background): “Several theorists (Hjort and Strafström, 2001; Li and Yan, 2001; Cuniberti et al., 2002; Feng and Xiong, 2002) have focused on Porath’s clean-cut experiment on transport through homogeneous, 30-base-pair-long DNA (Porath et al., 2000).”