Shape-tuned synthesis of dispersed magnetite submicro particles with good magnetic properties

被引：12

作者：

Bai, Wei ^{[1
]}

Meng, Xiangjian ^{[1
]}

Zhu, Xia ^{[2
]}

Jing, Chengbin ^{[1
,3
]}

Gao, Cheng ^{[1
]}

Chu, Junhao ^{[1
,4
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Tech Phys, Natl Lab Infrared Phys, Shanghai 200083, Peoples R China

[2] Yanan Univ, Innovat Coll, Xian 710100, Peoples R China

[3] Qingdao Univ Sci & Technol, Coll Mat Sci & Technol, Qingdao 266042, Peoples R China

[4] E China Normal Univ, Key Lab Polar Mat & Devices, Minist Educ, Shanghai 200062, Peoples R China

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2009年 / 42卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Magnetite (Fe(3)O(4)); Submicro particles; Magnetic properties; IRON-OXIDE NANOPARTICLES; FE3O4; NANOPARTICLES; MICROSPHERES; NANOCRYSTALS;

D O I：

10.1016/j.physe.2009.09.015

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Sphere-like Fe(3)O(4) submicro particles have been synthesized through a solvothermal route using FeCl(3) as the iron source, oleic acid as the surfactant and ethylene glycol as the reducing agent and solvent. Size ranging from similar to 150 to similar to 450 nm has been realized by controlling reaction time. Transformation of shape from spherical, porous spherical to polyhedral was demonstrated by adjusting the content of oleic acid. Room-temperature magnetization hysteresis loops show that the value of saturation magnetization increases from 57.8 to 72.4 emu/g and the corresponding coercive field increases from 44.3 to 93.5 Oe with increasing the grain size from similar to 150 to similar to 450 nm. Size-dependent magnetic properties of these sphere-like magnetite particles with high saturation magnetization and low coercive field may lead to new applications in biological fields. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：141 / 145

页数：5

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