Preparation of CdSe/CdS Quantum Dots and Quantum Dots@ Polystyrene Fluorescent Microspheres
- 材料学院－已发表论文 
针对量子点在聚苯乙烯(PS)微球中包载率不高的问题,首先通过热循环单前驱体耦合法制备出高效发光的CdSe/CdS核壳量子点,再采用配体交换及乳液; 聚合法将制备的CdSe/CdS核壳量子点包载在PS微球中.实验结果表明:所制备的CdSe/CdS核壳量子点的荧光量子产率超过90%;经过配体交换; ,不仅提高了量子点的溶解度,而且PS微球对量子点的包载率提高至87%.该结果对于提高量子点荧光微球在荧光免疫分析中的检测灵敏度具有较重要的意义.In order to improve the encapsulation efficiency of quantum dots in; polystyrene microspheres,CdSe/CdS core-shell quantum dots were firstly; prepared by thermal cycling single precursor coupling method. The; quantum dots@ polystyrene fluorescent microspheres were then; successfully obtained by embedding the CdSe/CdS core-shell quantum dots; in polystyrene microspheres using ligand exchange and emulsion; polymerization. The results indicated that the fluorescent quantum yield; of the prepared core-shell quantum dots was more than 90%.Using the; method of ligand exchange,not only the solubility of the core-shell; quantum dots was improved,but also the encapsulation efficiency of; quantum dots in polystyrene microspheres was increased to 87%.This might; be useful in improving the detection sensitivity of quantum dots; fluorescent microspheres in immunofluorescence assay.