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Probing the surface chemistry of different oxidized MWCNT for the improved electrical wiring of cytochrome c nitrite reductase
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Advisor(s)
Abstract(s)
"This work reports the evaluation of a set of multi-walled carbon nanotubes (MWCNT)
presenting different surface chemistries, as interfaces for the direct electrochemistry of
the multihemic nitrite reductase (ccNiR) from Desulfovibrio desulfuricans ATCC27774
(Dd). The carbon nanotubes dispersions were prepared in aqueous media and deposited
on pyrolytic graphite (PG) macroelectrodes, following a layer-by-layer methodology.
The resulting MWCNT bed was coated with ccNiR and studied by cyclic voltammetry.
Interestingly, although small non-catalytic cathodic waves were detected in all carbon
nanotubes bioconjugates, the complexity of these electrochemical signals was partially
deconvoluted in some materials, the less acidic ones emphasizing the contribution of the
catalytic centre. Consistently, these MWCNT were the most favourable for enzyme
catalysis, highlighting the importance of the surface oxide functionalities to enzyme
reactivity."
Description
NOTICE: this is the author’s version of a work that was accepted for publication in Electrochemistry Communications. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Electrochemistry Communications, VOL. 35, (October 2013). http://dx.doi.org/10.1016/j.elecom.2013.07.027
Keywords
Multi-walled carbon nanotubes Surface oxides Nitrite reductase Direct electrochemistry
Citation
Electrochemistry Communications. Volume 35, October 2013, Pages 17–21. http://dx.doi.org/10.1016/j.elecom.2013.07.027