中文摘要：

采用了N-乙酰-L-半胱氨酸为稳定剂,通过水热法制备了荧光发射峰可调、粒径均匀且结晶性能良好的ZnxCd1-xSe合金量子点,并采用紫外-可见光吸收光谱（UV-Vis）、荧光光谱（PL）、X射线衍射（XRD）、高分辨透射电镜（HRTEM）等对其结构和性能进行了表征。重点研究了Cd2＋/Zn2＋比值、初始溶液pH值、水热反应温度和时间等实验条件对ZnxCd1-xSe量子点荧光性能的影响。研究表明所制备的量子点荧光量子产率高（35%）,荧光发射谱半峰宽窄（FWHM〈50nm）,有望作为生物荧光标记物。

英文摘要：

In this paper,ZnxCd1-xSe quantum dots with tunable photoluminescence emission,uniform particle size and good crystallinity were synthesized by hydrothermal method,in which N-acetyl-L-crysteine was used as a stabilizer.UV-Vis absorption spectroscopy（UV-Vis）,photoluminescence（PL） spectroscopy,X-ray diffraction（XRD） spectroscopy,and high-resolution transmission electron microscopy were used to characterize their structures and properties.The effects of Cd2＋/Zn2＋ ratio,pH of the precursor solution,hydrothermal temperature and time on the photoluminescence properties of ZnxCd1-xSe quantum dots were significantly investigated in the present work.The results showed that the obtaining quantum dots possessed high photoluminescence yield（up to 35%） and narrow fluorescence full-width（FWHM50nm）.Therefore,the ZnxCd1-xSe quantum dots would be a promising fluorescent probe for biological and biomedical imaging.