微乳液法制备ZnS：Cu纳米微粒及其光学性能的表征

利用微乳液法制备出ZnS:Cu纳米微粒。XRD表明微粒粒径为3－5nm,且为立方晶型结构,在紫外吸收光谱中,ZnS:Cu纳米微粒吸收峰蓝移。发射光谱表明ZnS:Cu纳米微粒产生一个位于482nm的绿色履行发射带。     

光学玻璃材料动态冲击试验与鸟撞研究

针对多光谱硫化锌(zinc sulfide,ZnS)光学玻璃材料用于飞行器时的鸟撞问题进行了研究.对多光谱硫化锌玻璃进行了中高应变率下的压缩试验获得其材料属性.鸟体采用光滑粒子流体动力学(smoothed particle hydrodynamics,SPH)方法建模,引入Gruneisen状态方程定义鸟体本构模型.对...     

One-dimensional ZnS-based Hetero-, Core/shell and Hierarchical Nanostructures

A focus of the current nanotechnology has shifted from routine fabrication of nanostructures to designing functional electronic devices and realizing their immense potentials for applications. Due to infusion of multi-functionality into a single system, the utilization of hetero-, core/shell and hierarchical nanostructures has become the key issue for building such devices. ZnS, due to its direct wide bandgap, high index of refraction, high transparency in the visible range and intrinsic polarity, is one of the most useful semiconductors for a wide range of electronics applications. This article provides a dense review of the state-of-the-art research activities in one-dimensional （1D） ZnS-based hetero-, core/shell and hierarchical nanostructures. The particular emphasis is put on their syntheses and applications.     

FJ414型低本底α闪烁探头

在低本底α放射性测量中,金硅面垒半导体探测器、电离室、正比计数器和硫化锌闪烁探测器等都被广泛使用。它们各有其优缺点,但由于ZnS(Ag)闪烁体的材料便宜,制备工艺简单,因此使用得更广泛。 在低水平α放射性测量中,由于α粒子的电离密度大,能量高(一般大于4MeV),因此α粒子在探测器中产生的脉冲幅度比β粒子、μ介子大得多,测量装置不需要笨重的物质     

发光材料硫化锌纳米晶的合成与结构表征

本文主要是由改进的气－液共沉淀法，制备出ＺｎＳ和ＺｎＳ∶Ｍｎ的溶胶和粉末。并对制备过程中，锰的掺入量；反应物浓度；反应温度；反应时间等反应条件进行研究，选出最佳反应条件。同时，利用Ｘ－射线衍射仪和红外光谱仪对样品的结构进行研究，证明我们合成的样品为ＺｎＳ和ＺｎＳ∶Ｍｎ纳米晶。     

（ZnSe）n／（ZnS）m反应层超晶格的亚带结构

用Ｌｕｔｔｉｎｇｅｒ－ｋｏｈｎ有效质量理论研究了「００１」「方向生长的（ＺｎＳｅ）ｎ／（ＺｎＳ）ｍ应变层超晶格的电子结构，并与前人的计算结果进行了比较。     

纳米硫化锌分子沉积膜制备与光谱分析

以聚乙烯吡咯烷酮(PVP)为稳定剂,采用乙酸锌和硫化钠合成了硫化锌(ZnS)胶体,采用分子沉积膜技术制备了聚电解质与ZnS纳米颗粒的复合薄膜.在ZnS胶体的紫外-可见光吸收光谱上可观察到激子吸收峰,胶体的吸收带边约为313 nm,与其体相材料比较,有明显蓝移现象,显示出量子尺寸效应.透射电镜下可观察到ZnS胶体颗粒为球形,粒径为3-7 nm.吸收光谱显示,聚电解质与ZnS胶体复合薄膜的吸光度随薄膜层数增加而上升;荧光光谱显示,复合膜在380 nm附近有较强发光,随着膜厚度增加,发光强度逐渐增强.     

萃取溶剂热法制备ZnS纳米粒子

用萃取剂Cyanex 301(二(2,4,4-三甲基戊基)二硫代膦酸)将Zn2+萃取到有机溶剂中,将得到含Cyanex 301-Zn2+萃合物的有机相置于聚四氟乙烯作为内衬的高压反应釜中于150℃恒温24 h制备了ZnS纳米粒子。通过X射线粉末衍射仪(XRD)、透射电子显微镜(TEM)、紫外-可见吸收光谱(UV-Vis)和红外光谱(IR)表征了粒子的形貌和结构。结果表明,得到的ZnS是小粒子聚集体,Cyanex 301在整个反应过程中起到了萃取剂、硫源及表面修饰剂等多重作用。     

Synthesis and properties of water-soluble CdSe/ZnS nanocrystals with the type-I core/shell structure

The synthesis of CdSe/ZnS core/shell nanocrystals though aqueous phase using the coprecipitation method was reported. The influences of factors such as injection methods and dosages of precursors, reaction duration of water-bathing and the initial CdSe：ZnS molar ratio were discussed. In comparison to the CdSe plain core nanocrystals, the CdSe/ZnS core/shell nanocrystals show much brighter photoluminescence demonstrated by the photoluminescence spectra. The epitaxial growth of the core/shell structures was verified by TEM and XRD.