Ultrasensitive photoelectrochemical biosensing platform based target-triggered biocatalytic precipitation reactions on a flower-like Bi2O2S super-structured photoanode

Herein, we reported a novel photoelectrochemical immunoassay method based on a target-triggered on/off signal of the ultra-structured Bi 2 O 2 S (BOS) photoanode system for the sensitive testing of carcinoembryonic antigen (CEA) in serum samples.