Architecture of colloidal crystals constructed by silica hybrid nanoparticles |
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| Authors: | Koji Ishizu Yoko Tokuno Dong Hoon Lee Satoshi Uchida Masaaki Ozawa |
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| Affiliation: | 1. Department of Organic Materials and Macromolecules, International Research Center of Macromolecular Science, Tokyo Institute of Technology, Ookayama, Meguro‐ku, Tokyo 152‐8552, Japan;2. Chemical Research Laboratories, Synthesis Research Department, Nissan Chemical Industries, Limited, Tsuboi‐Cho, Funabashi‐City, Chiba 274‐8507, Japan |
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| Abstract: | Silica (SiO2)‐crosslinked polystyrene (PS) particles possessing photofunctional N,N‐diethyldithiocarbamate (DC) groups on their surface were prepared by the free‐radical emulsion copolymerization of a mixture of SiO2 (diameter Dn = 192 nm), styrene, divinyl benzene, 4‐vinylbenzyl N,N‐diethyldithiocarbamate (VBDC), and 2‐hydroxyethyl methacrylate with a radical initiator under UV irradiation. In this copolymerization, the inimer VBDC had the formation of a hyperbranched structure by a living radical mechanism. These particles had DC groups on their surface. Subsequently, poly(methyl methacrylate) brushes encapsulated SiO2 particles were synthesized by the grafting from a photoinduced atom transfer radical polymerization (ATRP) approach of methyl methacrylate initiated by SiO2‐crosslinked PS particles as a macroinitiator. We constructed the colloidal crystals using these photofunctional particles. Moreover, the SiO2 particle array of colloidal crystals was locked by radical photopolymerization with vinyl monomer as a matrix. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011 |
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| Keywords: | silica particle atom transfer radical polymerization (ATRP) hyperbranched structure polymer brushes colloidal crystal |
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