Evaluation properties of bioelectrodes based on carbon superfine materials containing model microorganisms Gluconobacter


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We have studied the properties of a bioelectrode formed by the immobilization of Gluconobacter oxydans bacterial cells on carbon superfine materials (CSMs). We use three types of CSMs (as adopted by the working classification CSM 1–3) with different carbonization rates. The bioelectrode is formed by covering the surface of the CSM suspension of bacteria in a chitosan gel. The properties of samples are evaluated by measuring the physiological state of the bacteria immobilized: (a) recording the intensity of cellular respiration, (b) for measuring the charge transport characteristics of electrode (bioelectrocatalysis), and (c) by measuring the electrode impedance. Measurements (b) and (c) are made on two and three-electrode circuits in the oxidation of ethanol in the presence of 2,6-dichlorophenol bacteria electron transport mediator. For CSMs 1 and 2 the electron transport by the oxidation of the substrate is not registered, while for CSM 3 the current generation occurs. The resistance of CSM 3 bioelectrode is below the resistance of CSMs 1 and 2 both before (39.6 kΩ/cm2 for CSM 3, 630 Ω/cm2 for CSM 2, and 1329 Ω/cm2 for CSM 1) and after the addition of the substrate (2.9 kΩ/cm2 for CSM 3, 45 kΩ/cm2 for CSM 2, and 58 kΩ/cm2 for CSM 1). The bioelectrode made of CSM 3 has a capacitance of 196 μF/cm2—greater than two orders of magnitude of the bioelectrode capacity of CSMs 1 and 2 (0.51 and 0.58 μF/cm2, respectively). It is important to further study the properties of the CSM class of materials, which are promising as the basis of mechanically flexible electrodes with controlled parameters.

作者简介

A. Reshetilov

Skryabin Institute of Biochemistry and Physiology of Microorganisms

编辑信件的主要联系方式.
Email: anatol@ibpm.pushchino.ru
俄罗斯联邦, Pushchino, Moscow oblast, 142290

J. Plekhanova

Skryabin Institute of Biochemistry and Physiology of Microorganisms

Email: anatol@ibpm.pushchino.ru
俄罗斯联邦, Pushchino, Moscow oblast, 142290

S. Tarasov

Skryabin Institute of Biochemistry and Physiology of Microorganisms

Email: anatol@ibpm.pushchino.ru
俄罗斯联邦, Pushchino, Moscow oblast, 142290

A. Bykov

Skryabin Institute of Biochemistry and Physiology of Microorganisms

Email: anatol@ibpm.pushchino.ru
俄罗斯联邦, Pushchino, Moscow oblast, 142290

M. Gutorov

OOO Gamma LLC

Email: anatol@ibpm.pushchino.ru
俄罗斯联邦, Zelenograd, Moscow, 124498

S. Alferov

Tula State University

Email: anatol@ibpm.pushchino.ru
俄罗斯联邦, Tula, 300012

T. Tenchurin

National Research Center “Kurchatov Institute,”

Email: anatol@ibpm.pushchino.ru
俄罗斯联邦, Moscow, 123182

S. Chvalun

National Research Center “Kurchatov Institute,”

Email: anatol@ibpm.pushchino.ru
俄罗斯联邦, Moscow, 123182

A. Orekhov

National Research Center “Kurchatov Institute,”

Email: anatol@ibpm.pushchino.ru
俄罗斯联邦, Moscow, 123182

A. Shepelev

National Research Center “Kurchatov Institute,”

Email: anatol@ibpm.pushchino.ru
俄罗斯联邦, Moscow, 123182

P. Gotovtsev

National Research Center “Kurchatov Institute,”

Email: anatol@ibpm.pushchino.ru
俄罗斯联邦, Moscow, 123182

R. Vasilov

National Research Center “Kurchatov Institute,”

Email: anatol@ibpm.pushchino.ru
俄罗斯联邦, Moscow, 123182

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