Preparation of multilayered gold-silica-polystyrene core-shell particles by seeded polymerization
Preparation of multilayered gold-silica-polystyrene core-shell particles by seeded polymerization
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DOI：
10.1016/j.jcis.2004.06.065
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发表时间：
2004-11-01
影响因子：
9.9
通讯作者：
Konno, M
中科院分区：
文献类型：
--
作者：
Gu, S;Onishi, J;Konno, M
提出了一种多层金-二氧化硅-聚苯乙烯核壳复合粒子的制备方法。采用籽晶生长法制备了粒径为192 nm的金-二氧化硅核壳粒子，并将其包裹在18 nm的金粒子表面，用于后续的聚苯乙烯包覆。用甲基丙烯酰氧丙基硫代甲氧基丁烷(MPTMS)对金-二氧化硅复合粒子进行表面修饰后，以8×10(-3)M的过硫酸钾为引发剂，在1×10(-3)M的对苯磺酸钠阴离子单体存在下，进行了苯乙烯(0.16~0.4M)的聚合反应。可以得到含有单核的多层核-壳金-二氧化硅-聚苯乙烯粒子。复合粒子的粒度分布变异系数(C-V)小于7%，聚苯乙烯壳层厚度在193~281 nm之间。(C)2004 Elsevier Inc.保留所有权利。
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.