水热法合成CdSe/ZnSe/ZnS核壳结构量子点

Synthesis of CdSe/ZnSe/ZnS Core/Shell Structure Quantum Dots by Hydrothermal Method

本研究采用水热法合成了3-巯基丙酸稳定的具有高荧光活性的CdSe/ZnSe/ZnS核/壳结构量子点，并通过透射电镜对量子点的形貌进行了表征。研究了影响量子点荧光强度的因素，并分析了量子点的稳定性。结果表明，水热法合成的CdSe/ZnSe/ZnS量子点，分布均匀，粒径大小均匀，约为5-8 nm。当激发波长为372 nm时CdSe/ZnSe/ZnS量子点可发射蓝紫色（446 nm）荧光，荧光活性高、荧光稳定性好，毒性低，可用于生物荧光标记、组分测定等。

In the study, 3-mercaptopropionic acid modified CdSe/ZnSe/ZnS core/shell structure quantum dots （QDs） with high fluorescence were prepared by hydrothermal method and characterized via transmission electron microscopy （TEM）. The influence factors of the fluorescence intensity and the stability of QDs have been studied. Results showed that excellent CdSe/ZnSe/ZnS QDs with uniform diameter （5-8 nm） were obtained. The prepared CdSe/ZnSe/ZnS QDs emit blue-violet light （446 nm） when excited at 372 nm with low toxicity, high fluorescence intensity and excellent stability, endowing the synthesized CdSe/ZnSe/ZnS QDs applied in biochemical analysis.