Synthesis and characterization of size-controlled cobalt-ferrite-based ionic ferrofluids

被引：158

作者：

Morais, PC

Garg, VK

Oliveira, AC

Silva, LP

Azevedo, RB

Silva, AML

Lima, ECD

机构：

[1] Univ Brasilia, Inst Fis, BR-70919970 Brasilia, DF, Brazil

[2] Univ Brasilia, Inst Biol, BR-70910900 Brasilia, DF, Brazil

[3] Univ Catolica Goias, Dept Matemat & Fis, BR-74115100 Goiania, Go, Brazil

[4] Univ Fed Goias, Inst Quim, BR-74001970 Goiania, Go, Brazil

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2001年 / 225卷 / 1-2期

关键词：

ferrofluids; cobalt ferrite; transmission electron microscopy; Mossbauer spectroscopy; superparamagnetism; size control; nanoparticle synthesis;

D O I：

10.1016/S0304-8853(00)01225-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Size-controlled synthesis of cobalt-ferrite nanoparticles, their passivation and peptization as stable ferrofluids are reported. Transmission electron microscopy and Mossbauer spectroscopy were used as characterization techniques. Particles with little change in size distribution, in the 10-15nm diameter ranges, were obtained using stirring speeds between 2700 and 8100 rpm. The anomalous diffusion has been used to explain the nanoparticle size-control mechanism. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：37 / 40

页数：4

共 11 条

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