Synthesis and characterization of surfactant-coated superparamagnetic monodispersed iron oxide nanoparticles

Synthesis and characterization of surfactant-coated superparamagnetic monodispersed iron oxide nanoparticles

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 Fe 2+. The obtained Fe 3O 4 nanoparticles were coated with sodium oleate. Low-fie...

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Veröffentlicht in:Journal of magnetism and magnetic materials 2001, Vol.225 (1), p.30-36
Hauptverfasser: Kim, D.K., Zhang, Y., Voit, W., Rao, K.V., Muhammed, M.
Format: Artikel
Sprache:eng
Schlagworte:
alkaline
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Coprecipitation
Diamagnetism and paramagnetism
Diamagnetism, paramagnetism and superparamagnetism
dispersions
Exact sciences and technology
Ferrofluid
Fine-particle systems
Magnetic properties and materials
magnetite particles
Nanoparticles
Physics
Small particles and nanoscale materials
Studies of specific magnetic materials
Superparamagnetism
Surfactant
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Zusammenfassung: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 Fe 2+. The obtained Fe 3O 4 nanoparticles were coated with sodium oleate. Low-field AC susceptibility and SQUID measurement show superparamagnetism with a blocking temperature around 150 K, and almost immeasurable remanence and coercivity.
ISSN:0304-8853
1873-4766
DOI:10.1016/S0304-8853(00)01224-5