Journal
CHEMISTRY LETTERS
Volume 38, Issue 2, Pages 130-131Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/cl.2009.130
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- Japan Society for the Promotion of Science (JSPS) [20310054]
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Hollow silica nanospheres have been successfully prepared by templating the polymeric micelles of poly(styrene-b-2-vinylpyridine-b-ethylene oxide) (PS-PVP-PEO), which shows a core-shell-corona structure in aqueous solutions. In this template, each block has its own function; the PS block (core) works as a template of the void space of hollow silica, the PVP block (shell) acts as a reaction field for the sol-gel reaction of silica precursor, and the PEO block (corona) stabilizes the polymer/silica composite particles. It was found that the diameter of the void space of the hollow silica spheres can be fine-tuned on a several nanometer scale by changing the chain length of the PS block. The wall thickness of the hollow silica is also finetuned by varying the concentration of the silica precursor.
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