Peer-Reviewed Journal Details
Mandatory Fields
Conghaile, PO,Falk, M,MacAodha, D,Yakovleva, ME,Gonaus, C,Peterbauer, CK,Gorton, L,Shleev, S,Leech, D
2016
February
Analytical Chemistry
Fully Enzymatic Membraneless GlucoselOxygen Fuel Cell That Provides 0.275 mA cm(-2) in 5 mM Glucose, Operates in Human Physiological Solutions, and Powers Transmission of Sensing Data
Published
WOS: 27 ()
Optional Fields
DIRECT ELECTRON-TRANSFER REDOX POLYMER-FILMS PYRANOSE DEHYDROGENASE AGARICUS-MELEAGRIS CARBON NANOTUBES BIOFUEL CELLS OSMIUM COMPLEXES PICHIA-PASTORIS BIOSENSORS OXIDATION
88
2156
2163
Coimmobilization of pyranose dehydrogenase as an enzyme catalyst, osmium redox polymers [Os(4,4'-dimethoxy-2,2'-bipyridine)(2)(poly(vinylimidazole))(10)Cl](+) or [Os(4,4'-dimethyl-2,2'-bipyridine)(2)(poly-(vinylimidazole))(10)Cl](+) as mediators, and carbon nanotube conductive scaffolds in films on graphite electrodes provides enzyme electrodes for glucose oxidation. The recombinant enzyme and a deglycosylated form, both expressed in Pichia pastoris, are investigated and compared as biocatalysts for glucose oxidation using flow injection amperometry and voltammetry. In the presence of 5 mM glucose in phosphate -buffered saline (PBS) (50 mM phosphate buffer solution, pH 7.4, with 150 mM NaCl), higher glucose oxidation current densities, 0.41 mA cm(-2) are obtained from enzyme electrodes containing the deglycosylated form of the enzyme. The optimized glucose -oxidizing anode, prepared using deglycosylated enzyme coimmobilized with [Os(4,4'-dimethyl-2,2'-bipyridine)(2)(poly(vinylimidazole))(10)Cl](+) and carbon nanotubes, was coupled with an oxygen -reducing bilirubin oxidase on gold nanoparticle dispersed on gold electrode as a biocathode to provide a membraneless fully enzymatic fuel cell. A maximum power density of 275 mu W cm(-2) is obtained in 5 mM glucose in PBS, the highest to date under these conditions, providing sufficient power to enable wireless transmission of a signal to a data logger. When tested in whole human blood and unstimulated human saliva maximum power densities of 73 and 6 mu W cm(-2) are obtained for the same fuel cell configuration, respectively.
10.1021/acs.analchem.5b03745
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