A Novel Method for the Fabrication of Monodisperse Hollow Silica Spheres

In this paper, we report a novel method for the fabrication of small monodisperse hollow silica spheres. In this approach, when silica shells were coated on polystyrene particles by the sol−gel method, the polystyrene cores were dissolved subsequently, even synchronously, in the same medium to form...

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Bibliographic Details
Published in:Langmuir 2006-07, Vol.22 (14), p.6403-6407
Main Authors: Deng, Ziwei, Chen, Min, Zhou, Shuxue, You, Bo, Wu, Limin
Format: Article
Language:English
Subjects:
Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Physical and chemical studies. Granulometry. Electrokinetic phenomena
Porous materials
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Summary:In this paper, we report a novel method for the fabrication of small monodisperse hollow silica spheres. In this approach, when silica shells were coated on polystyrene particles by the sol−gel method, the polystyrene cores were dissolved subsequently, even synchronously, in the same medium to form monodisperse hollow spheres. Neither additional dissolution nor a calcination process was needed to remove the polystyrene cores. Transmission electron microscopy, scanning electron microscopy, and porosity measurements were used to characterize the monodisperse hollow silica spheres.
ISSN:0743-7463
1520-5827
DOI:10.1021/la060944n