Physical constraints on charge transport through bacterial nanowires.
Physical constraints on charge transport through bacterial nanowires.
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DOI:
10.1039/c1fd00098e
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发表时间:
2012
影响因子:
3.4
通讯作者:
Beratan DN
中科院分区:
文献类型:
--
作者:
Polizzi NF;Skourtis SS;Beratan DN
Extracellular appendages of the dissimilatory metal-reducing bacterium Shewanella oneidensis MR-1 were recently shown to sustain currents of 1010 electrons per second over distances of 0.5 microns [El-Naggar et al., Proc. Natl. Acad. Sci. U. S. A., 2010, 107, 18127]. However, the identity of the charge localizing sites and their organization along the “nanowire” remain unknown. We use theory to predict redox cofactor separation distances that would permit charge flow at rates of 1010 electrons per second over 0.5 microns for voltage biases of ≤1V, using a steady-state analysis governed by a non-adiabatic electron transport mechanism. We find the observed currents necessitate a multi-step hopping transport mechanism, with charge localizing sites separated by less than 1 nm and reorganization energies that rival the lowest known in biology.
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影响因子:
62.1
作者:
Dempsey, Jillian L.;Winkler, Jay R.;Gray, Harry B.
通讯作者:
Gray, Harry B.
影响因子:
3.3
作者:
Cao, Jianshu
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3.4
作者:
El-Naggar, Mohamed Y.;Gorby, Yuri A.;Nealson, Kenneth H.
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Nealson, Kenneth H.
影响因子:
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影响因子:
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作者:
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ONUCHIC, JN