Research Advance on Smartphone-based Visual Biosensor in Point-of-Care Testing

Human physiological indicators have become an important standard for assessing health in modern society. Traditional detection methods often require a separate laboratory, complex operation process and long detection time, so it is urgent to develop portable, fast and accurate on -site detection technologies for bioanalysis. Point -of -care testing (POCT), which differs from traditional laboratory testing, can realize the rapid in situ detection of biomarkers without the complicated analytical process of the laboratory. Smartphones, which are an essential tool in our daily life, not only have independent operating systems and built-in storage functions, but also have high -definition cameras, which have great application potential in POCT visualization. The combination of various biosensing technologies and smartphones has developed into a new direction in the field of POCT. This review mainly introduced the research progress of smartphone-based visual biosensors in POCT in recent years, including colorimetric sensors, fluorescence sensors, chemiluminescence sensors and electrochemiluminescence sensors. Finally, the problems faced by smart -phone -based visual biosensors in the application of POCT were summarized, and their future development was prospected.