Abstract
The certification of cosmetic products has always been a prominent concern. Here, we have developed a pH sensor and applied it in the field of cosmetic safety. Initially, we designed two probes, CH with aggregation-induced emission (AIE) effect and the near-infrared fluorophore derivative CYTYR. By encapsulating them with DSPE-PEG2000-NH2, we obtained the CHCY-lipo nano-micelles with fluorescence resonance energy transfer (FRET) response. By combining them into a sensor array called pC, we achieved sensitive detection of a wide pH range, ranging from 4.69 to 9.25. To validate the performance of the pC sensor array, we employed a multi-channel mode and applied it to differentiate commercial anti-aging creams. Through linear discriminant analysis and 3D fingerprint analysis, the pC sensor array successfully distinguished anti-aging creams from different countries, providing a rapid and accurate method for cosmetic safety identification. The results of this study demonstrate the potential of the pC sensor array for quick authentication of cosmetic products, offering significant support and application prospects in safeguarding consumer health.
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