反胶束法制备SiO_2包裹的ZnS:Mn/ZnS量子点  

Preparation of Silica Overcoated ZnS:Mn/ZnS Quantum Dots by Reverse Micelle Method

作　　者：纪元[1] 赵军[1] 董兵辉[1] 付涛[1] 

机构地区：[1]西安交通大学生命科学与技术学院,陕西西安710049

出　　处：《合成化学》2013年第1期80-82,85,共4页Chinese Journal of Synthetic Chemistry

基　　金：中央高校基本科研业务费专项资金资助项目(xjj2011096);国家级大学生创新性实验计划资助项目(101069853)

摘　　要：采用反胶束法制备了SiO2包裹的ZnS∶Mn/ZnS量子点(1)。1的UV吸收峰在295 nm附近,低于体相ZnS(约340 nm);1中Mn2+含量升高,ZnS基质的缺陷荧光发射峰减弱,595 nm处的Mn2+特征荧光发射峰增强;但Mn2+含量过高时产生荧光淬灭。光学显微镜和透射电镜分析表明,1分散性较好,内核呈结晶态;Mn2+含量为2.2%时,1的内核直径和SiO2壳层厚度分别为6 nm和5 nm左右。Silica overcoated ZnS∶Mn/ZnS quantum dots（1） were prepared by reverse micellar method.Their UV-Vis absorption peaks lie at about 295 nm,lower than that of the bulk ZnS（340 nm）.With the increase of Mn2＋ amount,defect emission peaks of host ZnS were reduced,and the characteristic emission peak of Mn2＋ ions at 595 nm was enhanced;however,fluorescent quenching occurred when the Mn2＋ amount was too high.Optical microscopy and transmission electron microscopy analyses indicated that 1 exhibited good dispersity,and the nuclei was crystalline.The nuclei diameter and the thickness of SiO2 shell with Mn2＋/Zn2＋ molar ratio of 2.2% were about 6 nm and 5 nm,respectively.

关 键 词：量子点 ZNS MN 荧光 反胶束 制备 

分 类 号：O614[理学—无机化学] R318.08[理学—化学]