期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 225, 期 1-2, 页码 30-36出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0304-8853(00)01224-5
关键词
nanoparticles; superparamagnetism; surfactant; coprecipitation; ferrofluid
Synthesis and coating of superparamagnetic monodispersed iron oxide nanoparticles was carried out by chemical solution method. Controlled co-precipitation technique was used to prevent undesirable critical oxidation of Fe2+. The obtained Fe3O4 nanoparticles were coated with sodium oleate. Low-held AC susceptibility and SQUID measurement show superparamagnetism with a blocking temperature around 150K, and almost immeasurable remanence and coercivity. (C) 2001 Elsevier Science B.V. All rights reserved.
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