Charge Transfer and Charge Transport on the Double Helix

Details Charge Transfer and Charge Transport on the Double Helix Charge Transfer and Charge Transport on the Double Helix

2003-09-15

arxiv.org/abs/cond-mat/0309360v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

7 pages, 3 figures

Scientific paper

10.1002/pssb.200303603

We present a short review of various experiments that measure charge transfer and charge transport in DNA. Some general comments are made on the possible connection between 'chemistry-style' charge transfer experiments that probe fluorescence quenching and remote oxidative damage and 'physics-style' measurements that measure transport properties as defined typically in the solid-state. We then describe measurements performed by our group on the millimeter wave response of DNA. By measuring over a wide range of humidity conditions and comparing the response of single strand DNA and double strand DNA, we show that the appreciable AC conductivity of DNA is not due to photon assisted hopping between localized states, but instead due to dissipation from dipole motion in the surrounding water helix.

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