By combining molybdenum disulfide quantum dots (MoS QDs) synthesized using a facile hydrothermal method with copper nanoclusters (Cu NCs), copper-ion-modified molybdenum disulfide probes (Cu-MoS QDs) were obtained, enabling sensitive detection and specific recognition of tetracycline (TET). The synthesized probes were characterized using techniques such as fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The fluorescence values of the probes and TET after their reaction at different concentrations were used to calculate a detection limit of 30 nM for the synthesized probes. The recovery rate of actual samples reached a high value of 95.70%, with a relative standard deviation below 2.00%, demonstrating excellent accuracy and precision. The probe exhibited high selectivity towards TET. The accuracy is maximized when the concentration of the probe is 4.50 × 10 mol/L, indicating enhanced performance of the molybdenum disulfide probe after copper ion modification and obtaining favorable detection outcomes. This probe holds great potential in enhancing the safety of animal-derived food, ensuring public health, and preserving water resources.

中文翻译：

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铜纳米团簇修饰二硫化钼量子点探针灵敏检测四环素

通过将采用简便水热法合成的二硫化钼量子点（MoS QD）与铜纳米簇（Cu NC）相结合，获得了铜离子修饰的二硫化钼探针（Cu-MoS QD），能够灵敏检测和特异性识别四环素（ TET）。使用傅里叶变换红外光谱（FT-IR）、X射线光电子能谱（XPS）、透射电子显微镜（TEM）和扫描电子显微镜（SEM）等技术对合成的探针进行了表征。探针和 TET 在不同浓度下反应后的荧光值用于计算合成探针的检测限为 30 nM。实际样品回收率高达95.70%，相对标准偏差低于2.00%，表现出优异的准确度和精密度。该探针对 TET 表现出高选择性。当探针浓度为4.50×10 mol/L时，准确度达到最大，表明铜离子修饰后二硫化钼探针的性能增强，获得了良好的检测结果。该调查在提高动物源性食品的安全性、确保公众健康和保护水资源方面具有巨大潜力。