Fabrication of iron oxide/silica core-shell nanoparticles and their magnetic characteristics

被引：37

作者：

Jiang, Fuyi ^{[1
,2
]}

Fu, Yu ^{[1
]}

Zhu, Yuan ^{[2
,3
]}

Tang, ZiKang ^{[2
,3
]}

Sheng, Ping ^{[2
]}

机构：

[1] Yantai Univ, Sch Environm & Mat Engn, Yantai, Peoples R China

[2] Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[3] Sun Yat Sen Univ, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2012年 / 543卷

基金：

中国国家自然科学基金;

关键词：

Microemulsion; Core-shell nanoparticles; Iron oxide; Co-surfactant; Magnetic characteristics; REVERSE MICROEMULSION METHOD; QUANTUM DOTS; BIOMEDICAL APPLICATIONS; SILICA NANOPARTICLES; DRUG-DELIVERY; NANOCOMPOSITES; PARTICLES; SPHERES; FIELD; SIZE;

D O I：

10.1016/j.jallcom.2012.07.079

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：

Magnetic core-shell particles, each with a single iron oxide nanoparticle core, were prepared by the reverse microemulsion method. By using 1-butanol as a co-surfactant, one can effectively control the particle size ranging from 60 to 185 nm. The mechanism of incorporation of the hydrophobic nanoparticles in the center of a colloidal particle was discussed. The magnetic characteristics of the bare iron oxide nanoparticles and core-shell colloidal particles were studied by SQUID measurements. Superparamagnetic behavior has been found, with a blocking temperature of 200 and 100 K respectively. Under an external magnetic field, the as-prepared colloidal particles can assemble along the field direction to form linear structure. These give us a good chance to control the assembly of these colloidal particles by using an external field. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：43 / 48

页数：6

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