Electrochemical wiring of the Gram-positive bacterium Enterococcus faecalis with osmium redox polymer modified electrodes

Galina Pankratova, Kamrul Hasan, Dónal Leech, Lars Hederstedt, Lo Gorton

Research output: Contribution to journalArticlepeer-review

Abstract

The Gram-positive bacterium Enterococcus faecalis was investigated to test its ability to electrochemically communicate with electrodes. E. faecalis cells were successfully “wired” to gold electrodes through [Os(2,2′-bipyridine)2-poly(N-vinylimidazole)10Cl]2 +/+ redox polymer. Maximum current density achieved in response to 10 mM D-glucose was 18 ± 1 μA cm− 2. Control experiments without redox polymer showed no current response. This demonstrates the efficiency of the osmium-based mediator in electron transfer between the cells having a thick cell wall and the electrode. The findings have significant importance in microbial electrochemistry for further understanding of microbe-electrode interactions.

Original languageEnglish
Pages (from-to)56-59
Number of pages4
JournalElectrochemistry Communications
Volume75
DOIs
Publication statusPublished - 2017 Feb 1

Subject classification (UKÄ)

  • Biochemistry and Molecular Biology
  • Microbiology

Free keywords

  • Electrochemical communication
  • Enterococcus faecalis
  • Gram-positive bacterium
  • Osmium redox polymer

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