Ratio sensor, compared with a single signal sensor, has strong anti-interference ability and more accurate analysis result by collecting two or more response signals, and it is in biochemical sensing, optical imaging, food safety and environmental monitoring and other fields There is a wide range of applications. The current ratio sensor design is generally based on a single optical signal or electrical signal. Professor Luo Hongqun and Professor Li Nianbing of the School of Chemistry and Chemical Engineering of Southwest University proposed a combination of fluorescence and resonance scattering to construct a ratio sensor based on Rayleigh scattering theory. The design strategy of different signals to build a ratio sensor can further improve the anti-jamming capability and result accuracy of the ratio sensor. At the same time, the new sensor design scheme can be very good by utilizing the nanomaterial size and morphology to adjust the fluorescence and scattering signals. Realize target ratio detection. As a model study, the research team used a fluorescent carbon quantum dot and cobalt oxyhydroxide nanosheet composite as a sensing system to achieve a ratio analysis of ascorbic acid in small molecules. The research group has been devoted to the application of molecular spectroscopy in biochemical and environmental analysis. This is another important advancement of the research group in this research area.

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