Telling, MTF and Kilcoyne, SH 2007, 'Electron transfer in dextran probed by longitudinal field muon spin relaxation ' , Journal of Physics Condensed Matter, 19 (2) .

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Abstract

Electron-transfer processes play a crucial role in bio-nanobattery design, the electron transfer rate through the organic material being a key parameter in determining the resistance, maximum current, power density, discharge rate and duty cycle of the cell. The labelled electron method using positive muons allows such transfer processes in macromolecules, such as polymers and proteins, to be probed on a microscopic level. Here we present the results of an experiment using the labelled electron method with longitudinal field muon spin relaxation (LF-μSR) to investigate electron-transfer processes in dextran. The data are well described using the Risch–Kehr model and the results suggest intra-chain diffusion is the dominant transport process in this systembetween 15 and 250 K. Intra-chain diffusion rates of 1013 s−1 have been determined.

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