Synthesis and characterization of surfactant and silica-coated cobalt ferrite nanoparticles

被引：40

作者：

Bonini, M

Wiedenmann, A

Baglioni, P

机构：

[1] Univ Florence, Dept Chem, I-50019 Sesto Fiorentino, Florence, Italy

[2] Univ Florence, CSGI, I-50019 Sesto Fiorentino, Florence, Italy

[3] Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany

来源：

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2004年 / 339卷 / 1-2期

关键词：

ferrofluids; nanomagnetic; nanoparticles;

D O I：

10.1016/j.physa.2004.03.036

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper we report the synthesis and the characterization of ferrofluids constituted by cobalt-ferrite nanoparticles obtained from two different synthetic pathways: microemulsions and supersaturated solutions. Microemulsion technology leads to the formation of surfactant-coated magnetic nanoparticles, while dispersions of nanoparticles stabilized by their surface charges has been obtained by precipitating cobalt-ferrite from a supersaturated solution. The synthesis of a shell of silica on top of these nanoparticles is also reported. Surfactant coated nanoparticles have been characterized by means of UV-Vis absorption spectroscopy and trasmission electron microscopy (TEM), while nanoparticles obtained by supersaturated solutions have been studied by means of small-angle X-ray scattering (SAXS). (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：86 / 91

页数：6

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