摘要
采用N-乙酰-L-半胱氨酸(NAC)为修饰剂,制备了水溶性的Cd Te量子点。实验探讨了酸度、Cd与NAC摩尔比、Cd与Te摩尔比,以及反应时间对Cd Te量子点荧光性能的影响。结果表明:当mol(Cd)∶mol(Te)∶mol(NAC)为1∶0.3∶1时,Cd Te量子点荧光性能最好。通过测定量子点的紫外吸收光谱得出,随反应时间延长量子点的粒径从2.00 nm增加到3.69 nm。实验还通过红外光谱(IR)和X射线粉末衍射(XRD)对Cd Te量子点进行表征,结果表明在Cd Te量子点表面成功修饰了NAC。
Water-soluble CdTe quantum dots （QDs） were synthesized by using N-acetyl-L-cysteine （NAC） as modifier. The influence of acidity, the molar ratio of Cd：NAC and Cd：Te, and aging time on photoluminescence of obtained QDs had been discussed. The experimental results showed the optimum molar ratio of Cd,Te and NAC was 1 ： 0.3 ： 1. Particle size of QDs increased from 2.00 nm to 3.69 nm along with the extending of reaction time according to UV spectra of QDs. The water-soluble CdTe QDs were further characterized by infrared spectra（ IR）, and X-ray powder diffraction（ XRD）, and the experimental results indicated that CdTe was successfully modified by NAC.
出处
《南昌航空大学学报（自然科学版）》
CAS
2015年第2期75-79,共5页
Journal of Nanchang Hangkong University(Natural Sciences)
基金
江西省教育厅基金(GJJ14512)
江西省科技支撑项目(20151BBG70017)
关键词
CDTE量子点
水溶性
荧光
CdTe quantum dots
water solubility
fluorescence
