Revisiting the Stöber method: Inhomogeneity in silica shells

Yi Jian Wong; Liangfang Zhu; Wei Shan Teo; Yan Wen Tan; Yanhui Yang; Chuan Wang; Hongyu Chen

doi:10.1021/ja203316q

Revisiting the Stöber method: Inhomogeneity in silica shells

Yi Jian Wong, Liangfang Zhu, Wei Shan Teo, Yan Wen Tan, Yanhui Yang, Chuan Wang, Hongyu Chen

Research output: Contribution to journal › Article › peer-review

398 Scopus citations

Abstract

We demonstrate that the silica shell on nanoparticles formed by a typical Stöber method is inhomogeneous in nature. The outer layer of the shell is chemically more robust than the inner layer, which can be selectively etched by hot water. Methods are developed to "harden" the soft silica shells. These new understandings are exploited to develop versatile and template-free approaches for fabricating sophisticated yolk-shell nanostructures.

Original language	English
Pages (from-to)	11422-11425
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	133
Issue number	30
DOIs	https://doi.org/10.1021/ja203316q
State	Published - 3 Aug 2011
Externally published	Yes

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10.1021/ja203316q

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AU - Zhu, Liangfang

AU - Teo, Wei Shan

AU - Tan, Yan Wen

AU - Yang, Yanhui

AU - Wang, Chuan

AU - Chen, Hongyu

PY - 2011/8/3

Y1 - 2011/8/3

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AB - We demonstrate that the silica shell on nanoparticles formed by a typical Stöber method is inhomogeneous in nature. The outer layer of the shell is chemically more robust than the inner layer, which can be selectively etched by hot water. Methods are developed to "harden" the soft silica shells. These new understandings are exploited to develop versatile and template-free approaches for fabricating sophisticated yolk-shell nanostructures.

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M3 - 文章

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Revisiting the Stöber method: Inhomogeneity in silica shells

Abstract

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