Journal | ChemElectroChem |
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Date | Accepted/In press - 18 Nov 2019 |
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Date | E-pub ahead of print - 19 Nov 2019 |
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Date | Published (current) - 23 Dec 2019 |
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Issue number | 23 |
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Volume | 6 |
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Number of pages | 4 |
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Pages (from-to) | 5876-5879 |
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Early online date | 19/11/19 |
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Original language | English |
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Shewanella oneidensis is an electrogenic microbe which
could be more widely applied in biosensing and fuel cell applications
if better methods existed to promote electrode-biofilm formation. This
paper reports a simple procedure that converts agarose, a cheap and
readily available polymer, into a modified “MAgarose” material which
will form biocompatible hydrogels that embed gold nanoparticles
(AuNPs) along the fibers to yield a composite material with a
conductivity ca. 80 times higher than an unmodified agarose-AuNP
gel. Proof-of-concept bioelectrochemical experiments using
Shewanella oneidensis show that when these MAgarose-AuNP gels
are used to coat carbon veil there is a 10-fold increase in oxidative
microbial current production when tested in a 3-electrode cell set-up.
Microscopy results show that this can be attributed to the ability of the
composite hydrogel to support MR-1 growth throughout the 3D matrix.
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