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Protonic Conduction and Photochemical Modification of Protein Reflectin
Abstract
Proton-conducting materials play a central role in many renewable energy and
bioelectronics technologies. Although numerous examples of devices based on proton-conducting
materials exist, very few are based on natural materials. Reflectin, a proton-conducting cephalopod
structural protein, found in Doryteuthis (Loligo) pealeii, has recently shown figures of merit
similar to those reported for state-of-the-art artificial proton conductors and has also been
demonstrated as the active element in a protein-based protonic transistor. Here, we demonstrate
modulation of electrical properties by photochemical modification of reflectin A1 films. In
addition, we report a protocol for production and electrical characterization of reflectin A2
isoform.