Synthesis of Fe3O4 nanoparticles and their magnetic properties

被引：490
|
作者：
Wei, Yan [1 ]
Han, Bing [2 ]
Hu, Xiaoyang [1 ]
Lin, Yuanhua [3 ]
Wang, Xinzhi [4 ]
Deng, Xuliang [1 ]
机构：
[1] Peking Univ, Sch & Hosp Stomatol, Dept Geriatr Dent, Beijing 100081, Peoples R China
[2] Peking Univ, Sch & Hosp Stomatol, Dept Orthodont, Beijing 100081, Peoples R China
[3] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
[4] Peking Univ, Sch & Hosp Stomatol, Dept Prosthodont, Beijing 100081, Peoples R China
来源：
2011 CHINESE MATERIALS CONFERENCE | 2012年 / 27卷
基金：
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词：
Fe3O4; magnetic nanoparticles; modification; COATED MAGNETITE; HYPERTHERMIA; FLUIDS;
D O I：
10.1016/j.proeng.2011.12.498
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Fe3O4 magnetic nanoparticles (MNPs) were synthesized by a co-precipitation method using sodium citrate and oleic acid as modifiers. Phase composition and microstructure analysis indicate that the sodium citrate and oleic acid have been successfully grafted onto the surface of Fe3O4 MNPs. The magnetic behaviors reveal that the modification can decrease the saturation magnetization of Fe3O4 MNPs due to the surface effect. Fe3O4 MNPs modified by sodiumcitrate and oleic acid show excellent dispersion capability, which should be ascribed to the great reduction of high surface energy and dipolar attraction of the nanoparticles. (C) 2011 Published by Elsevier Ltd.
引用
收藏
页码：632 / 637
页数：6
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