Self-assembly fluorescent copper nanoclusters in alginate-based hydrogel sensor for histamine detection and visual monitoring of food spoilage

文献类型： 外文期刊

第一作者： Yang, Chunlei

作者： Yang, Chunlei;Zhang, Hongwei;Hou, Chenghao;Xu, Guiju;Sun, Fangfang

作者机构：

关键词： Ratiometric fluorescence; Self-assembly copper nanocluster; Histamine detection; Fluorescent visualization; Test strip

期刊名称：TALANTA （ 影响因子：6.1； 五年影响因子：5.5 ）

ISSN： 0039-9140

年卷期： 2025 年 294 卷

页码：

收录情况： SCI

摘要： Histamine is one of typical biogenic amines related with foodborne illness induced by eating spoiled food. Thus, it is vital to establish a reliable and efficient approach for histamine detection and food safety monitoring. In this work, a ratiometric fluorescent sensor based on CuNCs/SiQDs and CuNCs/SiQDs-alginate hydrogel test strip were established for histamine detection and fluorescent visual monitoring of food spoilage. Due to fluorescent spectrum of SiQDs overlaps obviously with the UV-vis absorption spectrum of CuNCs, which indicates sensing mechanism of this sensor may be fluorescent inner filter effect (IFE). The fluorescence of CuNCs would be quenched by histamine. With histamine level arising, the fluorescence peak of CuNCs decreases and SiQDs increases gradually, which realize the fluorescent ratiometric detection of histamine. The proposed sensor shows a good linear correlation between fluorescence ratio (F615/F437) and histamine concentration in the range of 0.4-7 mM with a detection limit of 16.6 mu M. Moreover, a novel CuNCs/SiQDs-alginate hydrogel test strip by integrating with smartphone is designed for fluorescent visual monitoring of spoiled process of aquatic products. The asprepared sensor and test strip are successfully exploited for histamine detection in food samples and visual monitoring spoiled process of foods.

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