Transparent and Capacitive Bioanode Based on Specifically Engineered Glucose Oxidaseстатья
Информация о цитировании статьи получена из
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Дата последнего поиска статьи во внешних источниках: 11 ноября 2019 г.
Аннотация:Here we detail an optimized transparent capacitive glucose oxidizing bioanode, capable of supplying current densities of 10 mu Acm(-2) at applied potentials of 0.1V-0.2V versus saturated calomel electrode, when continuously performing in a simple phosphate buffer, pH7.4 and artificial human tears, both with a glucose concentration of 0.05mM only. When operating in pulse mode, the bioanode was able to deliver current densities as high as 21 mu Acm(-2) at the beginning of the pulse with 571 mu Ccm(-2) total charges stored. The biogenic part of the enzymatic device was a recombinant glucose oxidase mutant from Penicillium amagasakiense with high catalytic efficiency towards glucose, up to 14.510(4)M(-1)s(-1). The non-biogenic part of the anodic system was based on a poly(3,4-ethylenedioxythiophene)-graphene nanocomposite, as a highly capacitive component with a capacitance density in the 1mFcm(-2) range, multi-walled carbon nanotubes, as an additional nanostructuring element, and a conductive organic 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 enzymatic anode for hybrid electric power biodevices, energizing smart contact lenses.