We present a new “off-on” fluorescence probe for detecting hypochlorite (ClO⁻) based on silicon quantum dots coupled with silver nanoparticles (SiQDs/AgNPs) as nanocomplexes. Via introducing N-[3-(trimethoxysilyl)propyl]ethylenediamine and catechol as initial reactants, silicon quantum dots (SiQDs) with excellent properties were synthesized through a simple hydrothermal method. Transmission electron microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy were used to characterize the morphology and structure of quantum dots. The fluorescence of SiQDs could be quenched by the silver nanoparticles (AgNPs) by surface plasmon-enhanced energy transfer (SPEET) from SiQDs (donor) to AgNPs (acceptor). The AgNPs could be etched by adding ClO⁻, thus freeing the SiQDs from the AgNP surfaces and restoring the SiQDs’ fluorescence. The sensing system exhibits many advantages, such as wide linear response range, high sensitivity, and excellent selectivity. Under optimized conditions, wide linear ranges (from 0.1 to 100.0 μM) and low detection limits (0.08 μM) were obtained for ClO⁻.

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我们提出了一个新的“断-通”用于检测次氯酸盐荧光探针（CLO ^- ）的基础上再加上的银纳米颗粒（SiQDs /的AgNPs）作为纳米复合物的硅量子点。通过引入N- [3-（三甲氧基甲硅烷基）丙基]乙二胺和邻苯二酚作为初始反应物，通过简单的水热法合成了具有优异性能的硅量子点（SiQDs）。透射电子显微镜，傅立叶变换红外光谱和X射线光电子能谱用于表征量子点的形态和结构。SiQDs的荧光可以通过银纳米颗粒（AgNPs）进行淬灭，方法是从SiQDs（供体）到AgNPs（受体）进行表面等离激元增强的能量转移（SPEET）。该的AgNPs可以通过添加CLO蚀刻^-，从而将SiQD从AgNP表面释放出来并恢复SiQD的荧光。该传感系统具有许多优势，例如宽线性响应范围，高灵敏度和出色的选择性。在优化条件下，获得了对CLO宽的线性范围（从0.1到100.0μM）和低的检出限（0.08μM）^- 。

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