Plasmonic heterostructure Bi 2 S 3 /Ti 3 C 2 with continuous photoelectron injection mediated near-infrared self-powered photoelectrochemical sensing.

Herein, a novel near-infrared (NIR) self-powered photoelectrochemical platform was constructed based on nonmetallic plasmon Ti 3 C 2 MXene coupled with sulphur vacancy engineered Bi 2 S 3 . The continuous photoelectron injection from Bi 2 S 3 to Ti 3 C 2 MXene induced a stable SPR effect and high photoelectric conversion efficiency, which is beneficial for developing high-performance NIR self-powered biosensors. As a proof of concept, a sensitive NIR self-powered sensor was constructed by conjunction with an aptamer using Microcystin-RR as a model analyte, which is one of the most common and toxic hepatotoxins released by cyanobacteria.