Počet záznamů: 1

A study of oleic acid-based hydrothermal preparation of CoFe.sub.2./sub.O.sub.4./sub. nanoparticles

  1. 1.
    0367606 - FZU-D 2012 RIV NL eng J - Článek v odborném periodiku
    Repko, A. - Nižňanský, D. - Poltierová Vejpravová, Jana
    A study of oleic acid-based hydrothermal preparation of CoFe2O4 nanoparticles.
    Journal of Nanoparticle Research. Roč. 13, č. 10 (2011), s. 5021-5031 ISSN 1388-0764
    Výzkumný záměr: CEZ:AV0Z10100520
    Klíčová slova: cobalt ferrite * hydrothermal synthesis * magnetic particles * sperparamagnetism
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 3.287, rok: 2011

    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.
    Trvalý link: http://hdl.handle.net/11104/0202212