水溶性量子点的制备及其与壳聚糖衍生物的自组装  

Preparation of Water-soluble Quantum Dots and Their Self-assembly with Chitosan Derivatives

作　　者：徐海娥[1] 闫翠娥[1] 

机构地区：[1]湖北大学化学化工学院,武汉430062

出　　处：《高等学校化学学报》2007年第1期169-172,共4页Chemical Journal of Chinese Universities

基　　金：武汉市青年科技晨光计划(批准号:020-093403);湖北省科技厅(批准号:020-092349)资助

摘　　要：以3-巯基丙酸(HS-CH2CH2COOH)为稳定剂,制备了水溶性的碲化镉(CdTe)量子点(QD s),考察了制备条件对QD s荧光性能的影响及CdTe QD s与壳聚糖及叶酸和聚乙二醇改性的壳聚糖的自组装.研究发现,壳聚糖及改性壳聚糖与QD s的复合物荧光强度相对纯的CdTe QD s明显增强,且QD s被包裹在内核,复合粒子呈明显的核/壳结构.改性壳聚糖/QD s复合物较小且尺寸分布更为均一.Water-soluble CdTe quantum dots（QDs） were prepared by using 3-mercaptopropionic acid as the stabilizer, and their preparation parameters were optimized. Self-assembling of QDs with chitosan and folio acid（FA） and poly（ethylene glycol）（PEG） modified chitosan via electrostatic interaction was also investigated. The results demonstrate that fluorescence intensity of chitosan/QDs complex was much higher than that of QDs themselves. The complex shows a clear core/shell structure, and QDs were located in the core. The modified chitosan/QDs complexes were smaller and more uniform than those of unmodified chitosan.

关 键 词：水溶性量子点 壳聚糖 壳聚糖衍生物 自组装 

分 类 号：O631[理学—高分子化学] O657[理学—化学]