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 .
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
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)
关键词
ZNS
纳米晶
嵌段共聚物
离子络合
自组装
ZnS
nanocrystals
ternary periodic copolymer
ion-complexometry
self-assembly
