Fig. 4. (A) Schematic of M13 bacteriophage based energy generator and generated voltage outputs. Reproduced from ref. 145, with permission from Royal Society of Chemistry. (B) Schematic of self-powered collagen-based humidity sensor. Reproduced from ref. 182, with permission from ACS publication. (C) Output voltage for eggshell membrane based energy generator. Reproduced from ref. 178, with permission from Elsevier.
