Abstract
The Gluconacetobacter sucrofermentas bacterial cells are immobilized in a chitosan gel on the surface of an electrode obtained by matrix printing. The nature of the change in the bioelectrochemical parameters of the immobilized bacteria under the influence of multiwalled carbon nanotubes (MWCNTs) are studied. We studied the electrochemical signals of cells upon the introduction of substrates (glucose, ethanol) by three methods: chronoamperometry, cyclic voltammetry, and impedance spectroscopy. The introduction of ethyl alcohol at a concentration of 1 mM leads to a decrease in the total resistance of the electrode by a factor of ~40. Modification of the electrode using MWCNTs leads to an increase in the current (by factors of 8 to 10) and an additional decrease in the total electrode resistance by a factor of ~10. These effects are similar to the effects of substrates and MWCNTs on the phylogenetically related Gluconobacter oxydans cells. The formation of bacterial cellulose (BC) membrane cells during the growth does not fundamentally change the effects of the substrates and MWCNTs.
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