摘要
以巯基丙酸为修饰剂合成了水溶性CdS量子点和核壳CdS/ZnS量子点。研究了溶液酸度、反应温度、反应时间对核壳CdS/ZnS量子点荧光性能的影响,并用红外光谱、X-射线衍射对量子点进行表征。实验结果表明:CdS/ZnS核壳结构量子点的荧光强度是CdS量子点的2.27倍,同时最大发射波长发生蓝移,从包覆前的562 nm移动到540 nm。
Water-soluble CdS and core/shell CdS/ZnS quantum dots （QDs） were prepared by using 3-mercaptopropionic acid as modifier. The effects of reaction time, pH, temperature on fluorescence emission spectra of CdS/ZnS QDs were discussed. The nanocrystals were characterized by X-ray powder diffraction （XRD） and FTIR. The results showed that the fluorescence intensity of core/shell CdS/ZnS QDs is 2.27 times that of CdS quantum dots, and the maximum emission wavelength had a blue shift, and changed from 562 nm to 540 nm.
出处
《南昌航空大学学报（自然科学版）》
CAS
2014年第1期60-63,共4页
Journal of Nanchang Hangkong University(Natural Sciences)
基金
江西省持久性污染物与控制控制与资源循环利用重点实验室项目(ST201222006)
关键词
量子点
荧光
水溶性
quantum dots
fluorescence
water-soluble
