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FP5

DNA BASED NANOWIRES Report Summary

Project ID: IST-2001-38951
Funded under: FP5-IST
Country: Italy

Incoherent charge hopping and conduction in DNA and long molecular chains in the context of electron-transfer theory

Some relations have been established between the kinetics of incoherent hopping charge transport in bridged large scale chemical systems or in a single-component duplex DNA, and the electrical properties of these systems connected between two electrodes [(a) M. Bixon and J. Jortner, "Incoherent charge hopping and conduction in DNA and long molecular chains", Chem. Phys. 319, 273 (2005); (b) M. Bixon and J. Jortner, "Shallow traps for thermally induced hole hopping in DNA", Chem. Phys. 326, 252 (2006)]. The kinetic model can be applied for the description of incoherent charge transport in a donor-acceptor pair connected by two electrodes. In summary, different behaviours of the current are found in the low-voltage and high-voltage regimes. In both limits the current intensity depends on the details of the voltage drop through the junction and on the lead-molecule interfaces, which are still to be unravelled before a quantitative theory is disclosed for the direct simulation of experimental conditions.

Reported by

ISTITUTO NAZIONALE PER LA FISICA DELLA MATERIA
CORSO F. PERRONE 24
16152 GENOVA
Italy
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