强发光的CdS量子点的水相制备及其表面修饰  

Aqueous Preparation of Strongly Luminescing CdS Quantum Dots and the Surface Modification

作　　者：李珊珊[1] 周兴平[2] 陈小立[3] 朱泉[1] 

机构地区：[1]东华大学化学与化工学院,上海201620 [2]东华大学生物科学与技术研究所,上海201620 [3]东华大学理学院,上海201620

出　　处：《东华大学学报（自然科学版）》2007年第6期788-792,共5页Journal of Donghua University(Natural Science)

摘　　要：室温下以柠檬酸钠为稳定剂,在水相中合成了CdS量子点.通过分析浓度、pH值、配比等因素,获得了强发光CdS量子点的制备条件.初步推断具有高能带隙的立方晶相的CdO.nH2O对同样是立方相的CdS量子点的表面修饰是得到强发光荧光性能的重要原因.A citrate-stabilized suspension of CdS quantum dots （QDs） was prepared at room temperature in aqueous solution. Effects of the reactants＇ concentrations, pH, and ratio of the reactants＇ concentration were investigated on the photoluminescence thus-prepared CdS Qds. Reaction conditions were obtained for synthesis of strongly luminescing CdS QDs. It was concluded that the modification of these CdS QDs by CdO· nH2O with a high band gap was an important reason to promote the photoluminescence of the QDs. Both of the CdS QDs and CdO · nH2O are cubic structure.

关 键 词：硫化镉(CdS) 量子点 水合氧化镉(CdO·nH2O) 立方结构 表面修饰 荧光性能 

分 类 号：O472.31[理学—半导体物理]