Revisiting the Stober Method: In homogeneity in Silica Shells

被引：382

作者：

Wong, Yi Jian ^{[2
]}

Zhu, Liangfang ^{[2
]}

Teo, Wei Shan ^{[2
]}

Tan, Yan Wen ^{[2
]}

Yang, Yanhui ^{[3
]}

Wang, Chuan ^{[1
]}

Chen, Hongyu ^{[2
]}

机构：

[1] Inst Chem Engn & Sci, Jurong Isl 627833, Singapore

[2] Nanyang Technol Univ, Div Chem & Biol Chem, Singapore 637371, Singapore

[3] Nanyang Technol Univ, Div Chem & Biomol Engn, Singapore 637459, Singapore

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 30期

关键词：

ENHANCED RAMAN-SCATTERING; GOLD NANOPARTICLES; DRUG-DELIVERY; NANOREACTORS; COLLOIDS; SPHERES; FUNCTIONALIZATION; TRANSFORMATION; NANOCAPSULES; PARTICLES;

D O I：

10.1021/ja203316q

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We demonstrate that the silica shell on nanoparticles formed by a typical Stober 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.

引用

页码：11422 / 11425

页数：4

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