title: Electricity generation by Geobacter sulfurreducens attached to gold electrodes.
abstract: The versatility of gold for electrode manufacture suggests that it could be an ideal material for some microbial fuel cell applications. However, previous studies have suggested that microorganisms that readily transfer electrons to graphite do not transfer electrons to gold. Investigations with Geobacter sulfurreducens demonstrated that it could grow on gold anodes producing current nearly as effectively as with graphite anodes. Current production was associated with the development of G. sulfurreducens biofilms up to 40 microm thick. No current was produced if pilA, the gene for the structural protein of the conductive pili of G. sulfurreducens, was deleted. The finding that gold is a suitable anode material for microbial fuel cells offers expanded possibilities for the construction of microbial fuel cells and the electrochemical analysis of microbe-electrode interactions.
authors.affiliation: Departments of Microbiology and Chemistry, University of Massachusetts-Amherst, MA 01003, USA. hrichter@microbio.umass.edu
authors.forename: Hanno
authors.initials: H
authors.lastname: Richter
authors.forename: Kevin
authors.initials: K
authors.lastname: McCarthy
authors.forename: Kelly P
authors.initials: KP
authors.lastname: Nevin
authors.forename: Jessica P
authors.initials: JP
authors.lastname: Johnson
authors.forename: Vincent M
authors.initials: VM
authors.lastname: Rotello
authors.forename: Derek R
authors.initials: DR
authors.lastname: Lovley
mesh_terms: D004566:Electrodes; D004583:Electrons; D045302:Geobacter / Q000737:chemistry* / Q000648:ultrastructure; D006046:Gold / Q000737:chemistry*; D018613:Microscopy, Confocal; D008855:Microscopy, Electron, Scanning; D013499:Surface Properties
chemical_list: D006046:Gold