“Worm-like” silica synthesis and its shape control

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Author: 
Xiaohui Song, Jinbo Xue, Weichang Xu and Cuicui Liu
Subject Area: 
Life Sciences
Abstract: 

The research on synthesis of hollow silica structures in the nanoscale has flourished in recent years because of their importance in the development of catalysis1 and biomedical applications2. In this work, a novel “worm-like” silica nanostructure holding Ag particle and nanocavities in the same shell was first reported. Studies on this interesting structure discovered a facile one-pot method to construct cavities-containing silica nanostructure using Ag+ salt and ligand 11-MUA. Variation of the key reaction factors such as metal salt, thiol ligand, water concentration and TEOS hydrolysis rate, along with the characterization experiments on the initial Ag+/11-MUA composite implied that a metal ion/thiol ligand coordination polymer had formed under the experimental condition. Furthermore, the unstable coordination polymer could possibly act as the template for silica coating/growth. This new method is significant as it does not require any complicated pre-synthesis or post-treatment procedures. Beside the potential applications of the cavity structure, combination with Ag NP in the “worm-like” nanocomposite may provide new opportunity for hybrid nanostructure development.

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