title: Electrochemical communication between microbial cells and electrodes via osmium redox systems.
abstract: 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.
authors.affiliation: Department of Biochemistry and Structural Biology, Lund University, P.O. Box 124, SE-22100 Lund, Sweden.
authors.forename: Kamrul
authors.initials: K
authors.lastname: Hasan
authors.forename: Sunil A
authors.initials: SA
authors.lastname: Patil
authors.forename: Dónal
authors.initials: D
authors.lastname: Leech
authors.forename: Cecilia
authors.initials: C
authors.lastname: Hägerhäll
authors.forename: Lo
authors.initials: L
authors.lastname: Gorton
mesh_terms: D001425:Bacterial Outer Membrane Proteins / Q000378:metabolism / Q000502:physiology; D001674:Bioelectric Energy Sources; D018441:Biofilms; D003580:Cytochromes / Q000378:metabolism / Q000502:physiology; D004566:Electrodes; D004579:Electron Transport; D009992:Osmium / Q000737:chemistry / Q000378:metabolism*; D010084:Oxidation-Reduction; D020560:Proteobacteria / Q000378:metabolism / Q000502:physiology*
chemical_list: D001425:Bacterial Outer Membrane Proteins; D003580:Cytochromes; D009992:Osmium