Title: Synthesis of monodisperse cobalt nanoparticles and their magnetic properties

Authors: Fatemeh Davar, Masoud Salavati-Niasari

Addresses: Institute of Nano Science and Nano Technology, Department of Chemistry, Faculty of Science, University of Kashan, Kashan, P.O. Box. 87317-51167, I. R. Iran. ' Institute of Nano Science and Nano Technology, Department of Chemistry, Faculty of Science, University of Kashan, Kashan, P.O. Box. 87317-51167, I. R. Iran

Abstract: Monodisperse Co₃O₄ nanoparticles are synthesised via a thermal decomposition method in the presence of triphenylphosphine and oleylamine using a new precursor [Bis(salicylidiminato)cobalt(II) ]. The products were characterised by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transformed infrared (FT–IR) spectroscopy and X-ray photoelectron spectroscopy (XPS). The hysteresis loops of the obtained samples reveal the ferromagnetic behaviours the enhanced coercivity (Hc) and decreased saturation magnetisation (Ms) in contrast to their respective bulk materials.

Keywords: Co3O4 nanoparticles; synthesis; monodisperse nanoparticles; cobalt nanoparticles; magnetic properties.

DOI: 10.1504/IJNP.2009.028760

International Journal of Nanoparticles, 2009 Vol.2 No.1/2/3/4/5/6, pp.276-281

Published online: 30 Sep 2009 *

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