Recent advances in electron manipulation of nanomaterials for photoelectrochemical biosensors

Abstract

Photoelectrochemical (PEC) biosensing as a promising and exuberantly developing technique has been widely applied in biological analysis in recent years because of its low background signal and high sensitivity. By...

The design of anti-fouling and anti-hydrolysis cyclic peptides for accurate electrochemical antigen testing in human blood

“…Notably, antigen testing, as a new potential approach for disease screening of COVID-19, can directly detect the constituent proteins of the virus, as antigens are produced before antibodies, making it more suitable for early screening. 8 Convenient, rapid, and relatively inexpensive antigen detection methods for COVID-19 have been developed, such as lateral immunochromatography 9 and enzyme-linked immunosorbent assay (ELISA). 10 In contrast, biosensing devices developed with electrochemical technology provide the advantages of rapid response and high sensitivity in antigen detection.…”

Polarity Conversion of the Ag2S/AgInS2 Heterojunction by Radical-Induced Positive Feedback Polydopamine Adhesion for Signal-Switchable Photoelectrochemical Biosensing

“…Photoelectrochemical (PEC) sensing is established based on PEC responses, that is, photoactive materials absorb photons to generate photogenerated carriers, which transfer to the electron donor–acceptor or electrode to reveal anodic or cathodic PEC responses. , Featuring high sensitivity, fast response, and low background signal, PEC sensing has been widely applied in disease marker detection, environment monitoring, and food testing. – However, PEC sensing is vulnerable to the influence of redox substances, leading to false positive or negative responses. At the same time, it is urgent to construct PEC biosensors with an amplified response to meet the increasing demand for detection.…”

Co9S8 nanoparticle-functionalized CdS nanoflowers for signal-off photoelectrochemical bioanalysis of carcinoembryonic antigens with hybridization chain reaction

“…[9][10][11][12][13] Among these techniques, photoelectrochemical (PEC) methods with the merits of costefficiency, easy operation, rapid analysis, and low background values have attracted more and more attention. [14][15][16][17][18] For example, Xu et al proposed a localized surface plasmon resonance and piezoelectric effect-based co-enhanced PEC sensing strategy for accurate monitoring of prostate-specific antigens. 19 Song's group designed a switchable multiplex PEC biosensor for the simultaneous detection of Alzheimer's disease-related amyloid-beta 42 and amyloid-beta 40.…”