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
收藏
页码：86 / 91
页数：6
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