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A study of oleic acid-based hydrothermal preparation of CoFe.sub.2./sub.O.sub.4./sub. nanoparticles
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SYSNO ASEP 0367606 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title A study of oleic acid-based hydrothermal preparation of CoFe2O4 nanoparticles Author(s) Repko, A. (CZ)
Nižňanský, D. (CZ)
Poltierová Vejpravová, Jana (FZU-D) RIDSource Title Journal of Nanoparticle Research. - : Springer - ISSN 1388-0764
Roč. 13, č. 10 (2011), s. 5021-5031Number of pages 11 s. Language eng - English Country NL - Netherlands Keywords cobalt ferrite ; hydrothermal synthesis ; magnetic particles ; sperparamagnetism Subject RIV BM - Solid Matter Physics ; Magnetism CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000295609700059 DOI 10.1007/s11051-011-0483-z Annotation Nearly monodisperse, well crystalline, superparamagnetic CoFe2O4 nanoparticles with diameter of 6 nm were synthesized in oleic acid-water-pentanol system at 180 _C. Hydrothermal procedure, as an efficient and environment friendly alternative to organic decomposition methods, was investigated by variation of reaction conditions, and the particle formation mechanism was finally proposed (i.e., hydrolysis of metal oleates in organic phase, with size of the particles (5-8 nm) controlled by polarity-driven precipitation into water phase). As-prepared particles were hydrophobic due to coating by oleic acid. Further modification with dimercaptosuccinic acid led to water-dispersible particles with hydrodynamic diameter of 20 nm. Prepared particles were investigated by TEM, XRD, ICP-AES, light scattering, SQUID magnetometry, and Mossbauer spectroscopy. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2012
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