The dependence of Co nanoparticle sizes on the ratio of surfactants and the influence of different crystal sizes on magnetic properties

被引：0
|
作者：
Y.K. Su
C.M. Shen
T.Z. Yang
H.T. Yang
H.J. Gao
H.L. Li
机构：
[1] Lanzhou University,Department of Chemistry
[2] Chinese Academy of Sciences,Nanoscale Physics and Devices Laboratory, Institute of Physics
来源：
Applied Physics A | 2005年 / 81卷
关键词：
Surfactant; Transmission Electron Microscopy; Cobalt; Magnetic Property; Oleic Acid;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Monodisperse cobalt nanoparticles were synthesized by high-temperature reduction of solution-phase cobalt chloride in the presence of a pair of surfactants, oleic acid and triphenylphosphine. Highly ordered two-dimensional superlattices of passivated cobalt nanoparticles were formed by a self-assembly technique. Analysis by X-ray diffraction, UV-vis absorption spectroscopy and transmission electron microscopy demonstrated that the size of the cobalt nanocrystals could be tuned by tailoring the concentration ratio of the two surfactants. In addition, the influence of different crystal sizes on magnetic properties of Co nanocrystals was also investigated.
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页码：569 / 572
页数：3
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