Preparation of multilayered gold-silica-polystyrene core-shell particles by seeded polymerization

被引：22

作者：

Gu, S ^{[1
]}

Onishi, J ^{[1
]}

Mine, E ^{[1
]}

Kobayashi, Y ^{[1
]}

Konno, M ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Engn, Dept Chem Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2004年 / 279卷 / 01期

关键词：

multilayered particles core-shell; nanoparticles; gold particle; silica coating; polystyrene coating; sol-gel; coupling reagent; anionic monomer; seeded polymerization;

D O I：

10.1016/j.jcis.2004.06.065

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A preparation method for multilayered gold-silica-poly styrene core-shell composite particles is proposed. The gold-silica core-shell particles of 192-nm-sized, synthesized by coating the 18-nm-sized gold particles with silica by a seeded growth technique, were used as cores for succeeding polystyrene coating. After surface modification of gold-silica composite particles by methacryloxypropyltilmethoxysitane (MPTMS), polymerizations of styrene (0.16-0.4 M) were conducted with 8 x 10(-3) M of potassium persulfate initiator in the presence of 1 x 10(-3) M of sodium p-styrenesulfonate anionic monomer. Multilayered core-shell gold-silica-polystyrene particles that contained a single core could be obtained. The coefficient of variation of size distribution (C-V) of the composite particles was less than 7%, and polystyrene shell thickness was in a range of 193 to 281 nm. (C) 2004 Elsevier Inc. All rights reserved.

引用

页码：284 / 287

页数：4

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