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Electron Transfer between the Gram‐Positive Enterococcus faecalis Bacterium and Electrode Surface through Osmium Redox Polymers
Author(s) -
Pankratova Galina,
Szypulska Ewelina,
Pankratov Dmitry,
Leech Dónal,
Gorton Lo
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201800683
Subject(s) - redox , enterococcus faecalis , osmium , electron transfer , polymer , penetration (warfare) , electrode , chemistry , bacteria , materials science , inorganic chemistry , ruthenium , photochemistry , biochemistry , organic chemistry , biology , escherichia coli , catalysis , genetics , operations research , engineering , gene
The interaction between microorganisms that contain thick cell walls, such as the Gram‐positive bacterium Enterococcus faecalis , and conductive surfaces can be improved by using redox polymers as mediators. Herein, we report a detailed electrochemical characterization of the communication between E. faecalis cells and a series of osmium redox polymers with different redox potentials. The current generated from glucose oxidation by films containing osmium redox polymers and E. faecalis cells increase over time (28 h), owing to a decrease in charge‐transfer resistance within the films, possibly owing to improved penetration of the redox polymer within the bacterial cell wall.