In-situ formation of Fe3O4 nanoparticles within the thermo sensitive hairy hybrid particles

被引：16

作者：

Bi, Shuxian ^{[1
]}

Wei, Xiangyu ^{[2
]}

Li, Na ^{[2
]}

Lei, Zhongli ^{[2
]}

机构：

[1] Ningxia Univ, Sch Chem & Chem Engn, Yinchuan 750021, Peoples R China

[2] Shaanxi Normal Univ, Key Lab Appl Surface & Colloid Chem, Minist Educ, Sch Chem & Mat Sci, Xian 710062, Peoples R China

来源：

MATERIALS LETTERS | 2008年 / 62卷 / 17-18期

关键词：

magnetic materials; nanocomposites; atom-transfer radical polymerization; poly(N-isopropylacrylamide);

D O I：

10.1016/j.matlet.2008.01.084

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Herein we report on the production of composite magnetic yolk-shell particles, where the shell consists of magnetite (Fe3O4) nanoparticle/ polymer bilayer and the colloidal yolk is SiO2 nanoparticles. A simple two-step method was developed for the covalent immobilization of atom-transfer radical polymerization (ATRP) initiators on the SiO2 surface. Well-defined functional polymer-SiO2 hybrids consisted of covalently tethered brushes of N-isopropylacrylamide (NIPAAm) polymer. Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) measurements confirmed the nanostructures and the components of the resulting nanoobjects. These stimuli-responsive hybrid gels will have potential applications in biomedical areas, such as tissue engineering and drug delivery. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：2963 / 2966

页数：4