Transparent and Capacitive Bioanode Based on Specifically Engineered Glucose Oxidase

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Transparent and Capacitive Bioanode Based on Specifically Engineered Glucose Oxidase

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Publication Article, peer reviewed scientific
Title Transparent and Capacitive Bioanode Based on Specifically Engineered Glucose Oxidase
Author Gonzalez-Arribas, Elena ; Pankratov, Dmitry ; Gounel, Sebastien ; Mano, Nicolas ; Blum, Zoltan ; Shleev, Sergey
Date 2016
English abstract
Here the authors detail an optimized transparent capacitive glucose oxidizing bioanode, capable of supplying current densities of 10 μA cm-​2 at applied potentials of 0.1 V-​0.2 V vs. SCE, when continuously performing in a simple phosphate buffer, pH 7.4 and artificial human tears, both with a glucose concn. of 0.05 mM only. When operating in pulse mode, the bioanode was able to deliver current densities ≤21 μA cm-​2 at the beginning of the pulse with 571 μC cm-​2 total charges stored. The biogenic part of the enzymic device was a recombinant glucose oxidase mutant from Penicillium amagasakiense with high catalytic efficiency towards glucose, up to 14.5x104 M-​1 s-​1. The nonbiogenic part of the anodic system was based on a poly(3,​4-​ethylenedioxythiophene)​-​graphene nanocomposite, as a highly capacitive component with a capacitance d. in the 1 mF cm-​2 range, multi-​walled carbon nanotubes, as an addnl. nanostructuring element, and a conductive org. complex, as an electron shuttle between the redox enzyme and the electrode surface. The bioanode could potentially serve as a prototype of a double-​function enzymic anode for hybrid elec. power biodevices, energizing smart contact lenses.
DOI https://doi.org/10.1002/elan.201600096 (link to publisher's fulltext.)
Publisher Wiley
Host/Issue Electroanalysis;6
Volume 28
ISSN 1040-0397
Pages 1290-1297
Language eng (iso)
Subject Sciences
Research Subject Categories::NATURAL SCIENCES
Handle http://hdl.handle.net/2043/21935 Permalink to this page
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