An in situ electron donor consumption strategy for photoelectrochemical biosensing of proteins based on ternary BiS/AgS/TiO NT arrays.

An ascorbic acid oxidase (AAO)-ascorbic acid bioevent-based electron donor consumption mode was introduced into the PEC bioassay for the first time. Ternary hybrid bismuth sulfide/silver sulfide/TiO nanotube arrays as the photoelectrode coupled with AAO attached to SiO as a dual signal quenching strategy were employed for sensitivity enhancement.