Biochemical Capacitance of Geobacter Sulfurreducens biofilms

BUENO, PAULO; SCHROTT, GERMÁN D.; BONANNI, P. SEBASTIAN; SIMISON, SILVIA NOEMÍ; BUSALMEN, JUAN PABLO

CHEMSUSCHEM

WILEY-V C H VERLAG GMBH

Lugar: Weinheim; Año: 2015

1864-5631

Geobacter is a genus of the -proteobacteria characterized by its respiratory versatility and has attracted increased interest since the demonstration that it can oxidize organic compounds to produce electricity, while respiring polarized electrodes.Interestingly, Geobacter can form biofilms on electrodes,where bioenergetic processes of the colony can be viewed as a kind of ?natural battery? that renews organic wastes into electricity.Respiratory activity of the so called electrogenic biofilm has been shown to be modulated by the potential applied to the working electrode, as cells are networked through external cytochromes that provide a conducting pathway towards it.Usable charge generation, conduction and accumulation features found in Geobacter are unprecedented in the microbial world and, besides the number of creative applications that have prompted in energy production, wastewater treatment, biosensors technology and bioelectronics, these processes still represent a problem to solve in terms of the definition of their control steps and their electric properties.