Nanocrystal templating of silica mesopores with tunable pore sizes

被引：81

作者：

Kónya, Z

Puntes, VF

Kiricsi, I

Zhu, J

Alivisatos, AP

Somorjai, GA ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[2] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

[3] Univ Szeged, Dept Appl & Environm Chem, Szeged, Hungary

来源：

NANO LETTERS | 2002年 / 2卷 / 08期

关键词：

D O I：

10.1021/nl0256661

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Metallic nanoparticles (platinum and gold) encapsulated in mesoporous silica (SBA-15) were prepared in the same solution by a novel two-step method. Characterization by X-ray scattering and electron microscopy consistently shows that the metal nanoparticles were homogeneously incorporated in the mesopores (retaining their size and morphology), even when the nanocrystal diameter exceeds the normal mesopore diameter. The nanoparticles nucleated the expansion of the mesopore channels in the 92-116 Angstrom range so they could accommodate the metal particles. This expansion occurs in the concentration range of 1-10(3) nanoparticles per 10(3) mesopore channels. This effect can be used to tune the pore size.

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页码：907 / 910

页数：4

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