Herein, by employing PCs to enhance

Herein, by employing PCs to enhance the uorescence intensity of dye molecules, we designed a one- array chip system to discriminate Baijiu. This is the rst time that the uorescence enhancement of PCs has been employed to identify distilled liquor. Six uorescent dyes, with an emission wavelength close to that of photonic stopbands, could react speci-cally with one or more types of Baijiu markers at room temperature and pressure. Production of such click chemistry could enhance or quench the uorescence. Through a slow photon effect, even small changes can make a big difference. A chip scanner with two laser emitters (emission ¼ 532 nm and 635 nm) was selected as the main site to collect signals, and all the information contained in the eight-channel array could be obtained. Subsequent use of pattern recognition and simulation of neural networks revealed the outstanding classication ability of our array chip. Moreover, compared with other liquid sensor arrays, which can be used only for eld conguration,the LOO accuracy of our array was >90% aer 10 days of dry storage under N2. With popularization, this glass-based PCs system could be benecial for quality control of Baijiu.