Preparation of size-controlled nanoparticles of magnetite

被引：73

作者：

Andrade, Angela L. ^{[1
,2
]}

Valente, Manuel A. ^{[3
]}

Ferreira, Jose M. F. ^{[2
]}

Fabris, Jose D. ^{[4
]}

机构：

[1] Univ Fed Ouro Preto, Dept Chem, BR-35400000 Ouro Preto, MG, Brazil

[2] Univ Aveiro, Dept Ceram & Glass Engn, CICECO, P-3810193 Aveiro, Portugal

[3] Univ Aveiro, Dept Phys, I3N, P-3810193 Aveiro, Portugal

[4] Fed Univ Jequitinhonha & Mucuri Valleys UFVJM, BR-39100000 Diamantina, MG, Brazil

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2012年 / 324卷 / 10期

关键词：

Iron oxide; Surface conditioning; Magnetic nanoparticle; Ferrofluid; HIGHLY CRYSTALLINE; AQUEOUS-SOLUTIONS; NANOCRYSTALS; PARTICLES; WATER; SHAPE; PRECIPITATION; MECHANISM; ZEOLITES; FE3O4;

D O I：

10.1016/j.jmmm.2011.12.033

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Samples of ferrofluids containing chemically stabilized nanoparticles of magnetite (Fe3O4) with tetramethylammonium hydroxide (TMAOH) were prepared by a direct reduction-precipitation method. The influences of aging time and temperature on the size and monodispersion characteristics of the produced nanoparticles were investigated. Transmission electron microscopy, powder X-ray diffraction, Fourier-transform infrared, and magnetization measurements with applied magnetic field up to 2T were used to characterize the synthesized iron oxides. Raising the temperature of the synthesized material in autoclave affects positively the monodispersion of the nanoparticles, but it was not found to significantly influence the size itself of individual particles. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1753 / 1757

页数：5

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