Polypyrrole Electrodes Show Strain‐Specific Enhancement of Photocurrent from Cyanobacteria

The discovery of extracellular electron conduits has spurred new applications in microbial electronics. Except for a limited number exoelectrogens, most microbes are surrounded by insulating membranes that impair transfer. This study focuses on the fabrication conductive polypyrrole (PPy) coating enhancing charge extraction. polymer deposition is characterized and optimized using combination potentiodynamic potentiostatic measurements as well scanning microscopy (SEM), energy dispersive X-Ray (EDX) analysis, Raman spectroscopy. electrodes used to extract photosynthetic electrons from cyanobacteria Synechocystis sp. PCC6803 (Synechocystis) Synechococcus Elongatus PCC7942 (Elongatus). PPy electrode shows sixfold increase extracted photocurrent under unmediated conditions compared bare graphite electrodes. enhancement attributed decreased resistance increased electroactive surface area electrode. By contrast, no substantial difference between Compared cells, cells show adherence with weaker interactions. These findings lay framework designing customized strain-specific