Intrinsic electrical properties of cable bacteria reveal an Arrhenius temperature dependence.

ABSTRACT: Filamentous cable bacteria exhibit long-range electron transport over centimetre-scale distances, which takes place in a parallel fibre structure with high electrical conductivity. Still, the underlying electron transport mechanism remains undisclosed. Here we determine the intrinsic electrical properties of the conductive fibres in cable bacteria from a material science perspective. Impedance spectroscopy provides an equivalent electrical circuit model, which demonstrates that dry cable bacteria filaments function as resistive biological wires. Temperature-dependent electrical characterization reveals that the conductivity can be described with an Arrhenius-type relation over a broad temperature range (- 195 °C to + 50 °C), demonstrating that charge transport is thermally activated with a

SUBMITTER: Bonne R 

PROVIDER: S-EPMC7666173 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature