Comparison of the Magnetic Properties for the Surface-Modified Magnetite Nanoparticles

被引：13

作者：

Lee, Joonsik ^{[1
]}

Choa, Yong-Ho ^{[2
]}

Kim, Jongryoul ^{[3
]}

Kim, Ki Hyeon ^{[1
]}

机构：

[1] Yeungnam Univ, Dept Phys, Kyongsan 712749, South Korea

[2] Hanyang Univ, Dept Chem Engn, Ansan 426791, South Korea

[3] Hanyang Univ, Dept Met Mat Engn, Ansan 426791, South Korea

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2011年 / 47卷 / 10期

基金：

新加坡国家研究基金会;

关键词：

g factor; magnetite; magnetization; spin resonance; superparamagnetic; FE3O4; NANOPARTICLES;

D O I：

10.1109/TMAG.2011.2145414

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The Fe3O4 nanoparticles were synthesized by a coprecipitation method, and their particles were capsulated by 3-thiopheneacetic acid (3TA), 2, 3-meso-dimercaptosuccinic acid (DMSA) and Polyethylene glycol (PEG), respectively. The 3TA-, PEG-, and DMSA-coated Fe3O4 nanoparticles are well dispersed in aqueous solution. The average particle sizes of the Fe3O4 and the 3TA-, PEG-, and DMSA-coated magnetite nanoparticles were exhibited approximately 10.4, 12, 11, and 12 nm by TEM results. The mean blocking temperatures of the uncoated Fe3O4 and the 3TA, PEG, DMSA surface-coated Fe3O4 nanoparticles exhibited about 245 +/- 10 K, 220 +/- 10 K, 142 +/- 12 K, and 200 +/- 10 K, respectively. The values of g factor of the uncoated Fe3O4 and the 3TA-, PEG-, and DMSA-coated Fe3O4 nanoparticles were obtained 2.22, 2.21, 2.22, and 2.19, respectively.

引用

页码：2874 / 2877

页数：4

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