Electron Transfer rate between a electrode and a bridged redox

Details Electron Transfer rate between a electrode and a bridged redox Electron Transfer rate between a electrode and a bridged redox

2009-12-16

arxiv.org/abs/0912.3083v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We derive an explict bias dependent expression for electron transfer reaction rate from a solvated redox to a electrode through a bridged molecule of arbitrary length. The interaction of the solvated redox with the solvent is modelled as a classical harmonic oscillator bath. The effect of competing process, namely resonance tunneling between redox and bridge and the solvation of the redox is investigated. Plots were produced for the case of 5 atom bridge. Our analysis shows that for certain suitable value of nearest-neighbour coupling, it is possible to block electron transfer in certain intermediate voltage regime

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