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Issue 48, 2015
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Thermally activated long range electron transport in living biofilms

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Abstract

Microbial biofilms grown utilizing electrodes as metabolic electron acceptors or donors are a new class of biomaterials with distinct electronic properties. Here we report that electron transport through living electrode-grown Geobacter sulfurreducens biofilms is a thermally activated process with incoherent redox conductivity. The temperature dependency of this process is consistent with electron-transfer reactions involving hemes of c-type cytochromes known to play important roles in G. sulfurreducens extracellular electron transport. While incoherent redox conductivity is ubiquitous in biological systems at molecular-length scales, it is unprecedented over distances it appears to occur through living G. sulfurreducens biofilms, which can exceed 100 microns in thickness.

Graphical abstract: Thermally activated long range electron transport in living biofilms

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The article was received on 28 Aug 2015, accepted on 28 Sep 2015 and first published on 28 Sep 2015


Article type: Paper
DOI: 10.1039/C5CP05152E
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Citation: Phys. Chem. Chem. Phys., 2015,17, 32564-32570
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    Thermally activated long range electron transport in living biofilms

    M. D. Yates, J. P. Golden, J. Roy, S. M. Strycharz-Glaven, S. Tsoi, J. S. Erickson, M. Y. El-Naggar, S. Calabrese Barton and L. M. Tender, Phys. Chem. Chem. Phys., 2015, 17, 32564
    DOI: 10.1039/C5CP05152E

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