Fig. 7.

A single cell electron collector in-situ assembled with biogenic FeS-NPs for significantly increasing interfacial electron transfer efficiency at the single-cell level and electricity production. a Schematic illustration of the FeS-NPs-based collector assembly, b SEM image of S. oneidensis MR-1 cell coated with FeS-NPs, c proposed electron transfer pathway from the cell as the electron collector to an electrode, d current output of the cell under different conditions [34]