“…In addition, biomaterials allow a biocompatible interface between electronic devices and biological worlds, thus broadening corresponding biotechnological and medicinal applications, such as implantable chips, artificial neurons, and electronic skin 20, 21, 22, 23, 24. Various types of biomaterials have been used as active units for fabrication of data‐storage devices, such as protein, polysaccharide, nucleic acid, and virus 25, 26, 27, 28, 29, 30. Due to versatile properties, such as biodegradability, biocompatibility, bioresorbability, optical transparency, and light weight, proteins, the most readily accessible biomolecules can be used as an attractive building blocks for the development of RRAM devices and endow these electronic memories with excellent performance and environmental benignity 31, 32.…”