ZnS纳米微晶的合成与光学性能的研究  

Studies of Synthesis and Optical Properties of ZnS Nanocrystals

作　　者：钟敏[1] 韩高荣[2] 葛洪良[1] 

机构地区：[1]中国计量学院,浙江杭州310018 [2]浙江大学,浙江杭州310027

出　　处：《稀有金属材料与工程》2007年第2期305-308,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(69890230);中国计量学院自然科学基金(XZ0512)

摘　　要：采用离子络合法和自组装法在丙烯酸/2-丙烯酰胺-2-甲基丙烷磺酸/丙烯酸羟丙酯(Aa-AMPS-hT)三元嵌段共聚物中原位合成了ZnS纳米微晶。用TEM,SED,紫外可见吸收光谱分析仪,荧光光谱分析仪等手段对纳米晶的微观形貌、结构、光学性能进行表征。结果表明:所得产物为六方晶型纤锌矿结构,粒度随着硫化时间的延长而增大;随着硫化时间的缩短,紫外可见吸收光谱的吸收边和结构峰蓝移,荧光光谱的峰位逐渐蓝移,量子尺寸效应显著。ZnS nanoparticles and one-dimensional nanocrystals were obtained by in-situ synthesis in Aa-AMPS-hT ternary periodic copolymer by ion complexometry and self-assembly method. The micro-morphology, structure and optical properties were characterized by TEM, SED, UV-vis spectra and PL spectra. The results show that the products are hexagonal ZnS nanocrystals with 15 nm-215 nm in diameter. The morphology and dimension of ZnS nanoparticles could be controlled by varying the sulfuration time. The UV-vis absorption spectra indicate that the absorption edges are blue-shifted by shortening the sulfuration time, exhibiting a marked quantum size effect. With shortening sulfuration time, the photoluminescence emission peak of 409.8 nm is blue-shifted, which could be ascribed to be the forbidden gap emission .

关 键 词：ZNS 纳米晶 嵌段共聚物 离子络合 自组装 

分 类 号：TB383.1[一般工业技术—材料科学与工程]