Confined growth of CdSe quantum dots in colloidal mesoporous silica for multifunctional nanostructures
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- 作者：Chunguang Li ; Zhenda Lu ; Qiao Zhang ; Jianping Ge ; Shaul Aloni…
- 刊名：Science China Materials
- 出版年：2015
- 出版时间：June 2015
- 年：2015
- 卷：58
- 期：6
- 页码：481-489
- 全文大小：1077KB
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29.Zhan - 作者单位：Chunguang Li (1) (2)
Zhenda Lu (2)
Qiao Zhang (2)
Jianping Ge (2)
Shaul Aloni (3)
Zhan Shi (1)
Yadong Yin (2)
1. State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, Jilin University, Changchun, 130012, China
2. Department of Chemistry, University of California, Riverside, CA, 92521, USA
3. The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA - 刊物类别：Materials Science, general; Chemistry/Food Science, general;
- 刊物主题：Materials Science, general; Chemistry/Food Science, general;
- 出版者：Science China Press
- ISSN：2199-4501
文摘
We report a new and convenient strategy for incorporating fluorescent semiconductor nanocrystals into silica hosts for the synthesis of multifunctional nanostructures. Mesoscale porosity was first created in conventional Stber silica spheres by chemical etching under the protection of polymeric ligands. Uniform and highly luminescent CdSe nanocrystals were then directly grown in the porous silica network by reacting the silica spheres in a growth solution at high temperature. The confinement of silica network led to slower nanocrystal growth and subsequently smaller CdSe dots with blue shifted fluorescence compared with those without confinement. The loading number of CdSe nanocrystals can be easily tuned by changing the degree of porosity of the silica. The advantages of this strategy include simplicity as no special surface treatment processes are needed, general applicability to silica hosts of various shapes and sizes, high flexibility in tuning the dimensions of both the active nanocrystals and host particles, and ample opportunities for incorporating multiple functionalities. With the demonstration of a porous Fe3O4@SiO2/CdSe composite structure with combined magnetic and optical properties, we believe this strategy may provide a platform for the fabrication of a large variety of multifunctional composite nanostructures. , CdSe CdSe CdSe, CdSe. : , , Fe3O4@SiO2/CdSe.