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Cohen, H., Nogues, C., Naaman, R. and Porath, D. (2005) Direct measurement of electrical transport through single DNA molecules of complex sequence. Proceedings of the National Academy of Sciences of the United States of America, 102(33), 11589-11593.

has been cited by the following article:

• TITLE: Distance-dependent coherent charge transport in DNA: crossover from tunneling to free propagation

  AUTHORS: Natallia V. Grib, Dmitry A. Ryndyk, Rafael Gutiérrez, Gianaurelio Cuniberti

  KEYWORDS: DNA; Electron Transport; Modeling of DNA; Electronic Structure of DNA

  JOURNAL NAME: Journal of Biophysical Chemistry, Vol.1 No.2, September 7, 2010

  ABSTRACT: Using a tight-binding model, we investigate the influence of intra- and interstand coupling parameters on the charge transport properties in a G-(T)j-GGG DNA sequence and its (G:C)-(T:A)j-(G:C)3 duplex attached to four electrodes. Dependences of the transmission function and of the corresponding conductance of the system on the number of bridging sites were obtained. Simulation results of a recently proposed two-strand superexchange (tunneling) model were reproduced and extended. It is demonstrated that the crossover from strong to weak distance-dependent charge transport is elucidated by a transition from under-barrier tunneling mechanism to free over-barrier propagation in the coherent regime, controlled by temperature and coupling parameters. The role of DNA- electrode coupling has been also considered. It was found that an asymmetry in the DNA-electrode coupling has a drastic effect on the con-ductance leading to an increase in delocaliza-tion of the electronic states in the DNA duplex.