Electrochemical communication between microbial cells and electrodes via osmium redox systems.

Research output: Contribution to journalArticle


Electrochemical communication between micro-organisms and electrodes is the integral and fundamental part of BESs (bioelectrochemical systems). The immobilization of bacterial cells on the electrode and ensuring efficient electron transfer to the electrode via a mediator are decisive features of mediated electrochemical biosensors. Notably, mediator-based systems are essential to extract electrons from the non-exoelectrogens, a major group of microbes in Nature. The advantage of using polymeric mediators over diffusible mediators led to the design of osmium redox polymers. Their successful use in enzyme-based biosensors and BFCs (biofuel cells) paved the way for exploring their use in microbial BESs. The present mini-review focuses on osmium-bound redox systems used to date in microbial BESs and their role in shuttling electrons from viable microbial cells to electrodes.


  • Kamrul Hasan
  • Sunil Patil
  • Dónal Leech
  • Cecilia Hägerhäll
  • Lo Gorton
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Biochemistry and Molecular Biology
Original languageEnglish
Pages (from-to)1330-1335
JournalBiochemical Society Transactions
Issue number6
Publication statusPublished - 2012
Publication categoryResearch