Preparation and Stability of Strongly Luminescing CdSe/Cd(OH)2/SiO2 Nano-composite Particles in Aqueous Solution

Cadmium hydrous oxide deposited cadmium selenide nanoparticles were prepared by the addition of cadmium sulfate solution to cadmium selenide nanoparticles in weak alkaline solution at room temperature. The photoluminescence measurement displayed that the luminescence intensity was greatly increased by the addition of cadmium ions due to the formation of cadmium hydrous oxide on the surface of the cadmium selenide nanoparticles. Then, CdSe/Cd(OH)2/SiO2 nano-composite particles were synthesized using 3-mercatopropyl trimethoxysilane (MPS) by St謆er method. After the formation of the wafer-structured CdSe/Cd(OH)2/SiO2 nano-composite particles, the emission ability was mostly stabilized. Additionally, the stabilization of the wafer-structured composite particles against dilution with water was checked. The results showed that the photoluminescence stability was promoted after the deposition of silica on the surface of the CdSe/Cd(OH)2 nanoparticles. Comparison of stability of CdSe/SiO2 with that of CdSe/Cd(OH)2/SiO2 showed that Cd(OH)2 coating could enhance the photoluminescence effectively.
Photoluminescence (PL) preparation CdSe cadmium hydrous oxide SiO2
周兴平 陈志龙 黄鹏 戴国亮 粕谷厚生
东华大学生物科学与技术研究所 上海 201620;日本东北大学学际科学国际高等研究中心 日本仙台 980-8578 东华大学生物科学与技术研究所 上海 201620 中国科学院国家微重力实验室 北京 100080 日本东北大学学际科学国际高等研究中心 日本仙台 980-8578
国际会议
成都
英文
2007-11-19(万方平台首次上网日期,不代表论文的发表时间)