分别用巯基乙酸(TGA),巯基丙酸(MPA),L-半胱氨酸(L-Cys),3-巯基-1,2-丙二醇(TG)作为稳定剂,在水相中合成出CdTe纳米晶体,研究了稳定剂对所制备的纳米晶光学性质的影响,并且对所合成的球状和棒状纳米晶的稳定性进行了研究。实验结果表明,不同的稳定剂可以得到不同型貌的纳米晶,用L-半胱氨酸(L-Cys),巯基乙酸(TGA),巯基丙酸(MPA),3-巯基-1,2-丙二醇(TG)所得到的CdTe纳米晶的吸收和发射峰位不同,这是受稳定剂自身的官能团性质和空间位阻作用影响的结果。
CdTe nanocrystals were synthesized in aqueous solution with thioglycolic acid (TGA), L-cysteine (L-Cys), 3-mercaptopropionic acid (MPA) and 1-thioglycerol (TG) as stabilizers. We systematically investigated the effect of different stabilizers on the optical properties of CdTe nanocrystals and the stability of spherical CdTe nanocrystals and nanorods. The results indicate that different shapes, absorption spectrum and PL emission spectrum of CdTe nanocrystals can be obtained with using different stabilizers contained TGA, MPA, TG and L-Cys. It is due to the influences of stereo-hindrance effect and functional groups of different stabilizers.