Preparation of silica encapsulated CdSe quantum dots in aqueous solution with the improved optical properties
Preparation of silica encapsulated CdSe quantum dots in aqueous solution with the improved optical properties
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DOI：
10.1016/j.apsusc.2004.08.022
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发表时间：
2005-04-15
影响因子：
6.7
通讯作者：
Kasuya, A
中科院分区：
文献类型：
--
作者：
Zhou, XP;Kobayashi, Y;Kasuya, A
采用3-巯丙基三甲氧基硅烷（MPS）在弱碱性溶液中，室温下制备了二氧化硅包裹的CdSe量子点。通过透射电子显微镜（TEM）观察，多核壳结构的CdSe/SiO2量子点的平均粒径为28.0 nm，CdSe量子点的平均粒径为3.4 nm。量子点的光致发光（PL）强度的增强已被观察到的二氧化硅壳钝化。增加的光化学和物理稳定性的封装的CdSe/SiO2量子点也已被证明。(c)2004 Elsevier B. V.保留所有权利。
Silica encapsulated CdSe quantum dots (QDs) have been prepared by the use of 3-mercaptopropyl trimethoxysilane (MPS) in a weak alkaline solution in ambient atmosphere at room temperature. The average size of the multicore-shell structured CdSe/SiO2 is 28.0 nm and that of the CdSe QDs is 3.4 nm from the observation of the transmission electron micrographs (TEMs). The enhanced photoluminescence (PL) intensity of the QDs has been observed by passivation of silica shell. The increased photochemical and -physical stability of the encapsulated CdSe/SiO2 QDs has also been demonstrated. (c) 2004 Elsevier B.V. All rights reserved.