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用不同稳定剂(巯基乙酸(TGA)、巯基丙酸(MPA)、L-半胱氨酸(L-Cys)、3-巯基-1,2-丙二醇(TG))在水相中制备了CdTe纳米晶,并用透射电子显微镜(TEM)、X射线光电子能谱(XPS)和X射线粉末衍射(XRD)等技术对其进行了表征.研究了不同水相合成条件对CdTe纳米晶光学性质的影响,结果表明,n(Cd)∶n(Te)、溶液pH值、回流时间以及稳定剂的性质,对纳米晶的光学性质具有显著影响.制得的CdTe纳米晶发射峰窄且对称(半高全宽达38nm),用不同稳定剂制备的纳米晶发光量子效率有所不同,用不同的激发波长对纳米晶进行激发时,发射峰并未表现出明显的移动.
CdTe was prepared in water with different stabilizers (TGA, MPA, L-Cys, 3-mercapto 1,2-propanediol The nanocrystals were characterized by TEM, XPS and XRD.The effects of different aqueous conditions on the optical properties of CdTe nanocrystals were investigated. , The results show that the optical properties of nanocrystals have significant influence on the properties of n (Cd): n (Te), solution pH, reflux time and the stability of the nanocrystals.The CdTe nanocrystals have narrow and symmetrical emission peaks (full width at half maximum Up to 38 nm). The quantum efficiency of the nanocrystals prepared with different stabilizers is different. When the nanocrystals are excited with different excitation wavelengths, the emission peaks do not show obvious movement.