二硫化钼量子点作为过渡金属硫化物的典型代表，因其独特的光学性质和巨大的应用潜力而备受关注。本文以二硫化钼粉末状晶体为原料，采用溶剂热方法处理得到二硫化钼量子点。在一定的激发条件下，二硫化钼量子点具有很强的荧光特性，可以将其作为荧光探针去检测多巴胺。结果表明，制备的二硫化钼量子点平均尺寸大小约为3 nm，具有很强的荧光特性，荧光量子效率高达57.55％。当多巴胺浓度从0.02 μmol/L变为1 000 μmol/L时，二硫化钼量子点传感系统会呈现出线性相关的荧光猝灭，且检测限为0.32 μmol/L，灵敏度极高。在不同pH值环境和干扰物存在下，二硫化钼量子点传感系统检测多巴胺具有强稳定性和高选择性。二硫化钼量子点因纯度高、尺寸小、荧光强度高等特性在催化、光学成像、显示器件和荧光传感等方面具有潜在的应用前景。

Molybdenum disulfide quantum dots (MoS2 QDs), as a typical representative of transition metal dichalcogenides(TMDs), had attracted much attention due to the unique optical properties and huge potential applications. In this paper, MoS2 QDs were fabricated through a facile solvothermal method from MoS2 powder crystals. Under certain excitation conditions, MoS2 QDs had strong fluorescence properties and were used as fluorescence probes to detect dopamine (DA). The results showed that the average size of the as-prepared MoS2 QDs was about 3 nm, and the fluorescence quantum efficiency was as high as 57.55%. When the concentration of DA changed from 0.02 to 1 000 μmol/L, the fluorescence of the sensing system was quenched with a linear dependence and the limit of detection was 0.32 μmol/L, with extremely high sensitivity. MoS2 QDs sensing system has strong stability and high selectivity for dopamine detection in different pH values and the presence of interferences. MoS2 QDs had potential applications in catalytic reactions, optical imaging, display devices and fluorescence sensing due to the high purity, small size and high fluorescence intensity.