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Conductive gels based on modified agarose embedded with gold nanoparticles and their application as a conducting support for Shewanella oneidensis MR-1
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Publication details
| Journal | ChemElectroChem |
|---|---|
| Date | Accepted/In press - 18 Nov 2019 |
| Date | E-pub ahead of print - 19 Nov 2019 |
| Date | Published (current) - 23 Dec 2019 |
| Issue number | 23 |
| Volume | 6 |
| Number of pages | 4 |
| Pages (from-to) | 5876-5879 |
| Early online date | 19/11/19 |
| Original language | English |
Abstract
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.
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.
Bibliographical note
© 2019 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.
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