Phase transformation of FeO/Fe3O4 core/shell nanocubes and facile synthesis of Fe3O4 nanocubes
Authors:
- 21 April 2010
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 107 (9) , 09E301
Abstract
A phase transformation induced by reduction in the γ-Fe2O3 nanocubes synthesized by oxidizing the corresponding FeO/Fe3O4 nanocubes was achieved in solution. Results from x-ray diffraction (XRD), color indication, and magnetic analysis strongly support this phase transformation. The γ-Fe2O3 nanocubes were transformed to Fe3O4 nanocubes within 260–300 °C range and the FeO/Fe3O4 nanospheres at 350 °C. The change in shape of the nanoparticles within the γ-Fe2O3→Fe3O4 transformation as observed from the transmission electron microscopy images was representative for entire the nanoparticles systems as confirmed by the XRD patterns of these nanoparticles in assembled state, suggesting a simple and novel route for synthesis of Fe3O4 nanocubes.Keywords
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