A Comparative Study of Biocathodes Based on Multiwall Carbon Nanotube Buckypapers Modified with Three Different Multicopper Oxidases |
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| Authors: | Dmitry V. Pankratov Yulia S. Zeifman Olga V. Morozova Galina P. Shumakovich Irina S. Vasil'eva Sergey Shleev Vladimir O. Popov Alexander I. Yaropolov |
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| Affiliation: | 1. Kurchatov NBIC Centre, National Research Centre “Kurchatov Institute”, Akademika Kurchatova pl. 1, 123182 Moscow, Russia;2. A.?N. Bach Institute of Biochemistry RAS, Leninsky prospekt 33,119071 Moscow, Russia;3. Biomedical Sciences, Faculty of Health and Society, Malm? University, Jan Waldenstr?ms gata 25, 214 28 Malm?, Sweden |
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| Abstract: | 14 Single‐ and multi‐walled carbon nanotubes from different sources were characterized in detail, and the characteristics obtained were carefully analyzed. The carbon material with the highest capacitance, and also other superior properties (“Taunit‐M” from “NanoTechCenter”, Russia), was chosen for further modification and fabrication of buckypaper based electrodes. These electrodes were biomodified with plant and fungal laccases, as well as fungal bilirubin oxidase. The designed biocathodes were investigated in simple buffers and also in a complex physiological fluid (human serum). Biocathodes based on immobilized fungal laccase were bioelectrocatalytically inactive in chloride containing media at neutral pH. In spite of the quite high current densities realized using biodevices based on plant laccase and fungal bilirubin oxidase, the limited thermal stability of the enzymes renders the biocathodes inadequate for practical applications in implanted situations. |
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| Keywords: | Biocathode Bilirubin oxidase Buckypaper Laccase Multicopper oxidase |
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