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Issue 24, 2010
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Facile synthesis of size-controllable monodispersed ferrite nanospheres

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Abstract

Monodispersed ferrite nanospheres were synthesized in an ethylene glycol/diethylene glycol (EG/DEG) binary solvent by using poly(vinylpyrrolidone) (PVP) as the surfactant. Particle size control can be attained by careful adjustment of the VEG/VDEG ratio. Different from previous reports, the magnetic studies of our iron ferrite (Fe3O4) nanospheres with various sizes from 20 to 300 nm reveal that they exhibit a similar magnetic saturation (Ms) value. In particular, both the ferromagnetic and superparamagnetic Fe3O4 nanospheres with similar Ms can be selectively obtained by varying the H2O concentration in the reaction system. The magnetic resonance imaging (MRI) characterization indicates that the as-prepared superparamagnetic Fe3O4 and ZnFe2O4 nanospheres possess a T2 relaxivity range that can be used as potential MRI contrast agents.

Graphical abstract: Facile synthesis of size-controllable monodispersed ferrite nanospheres

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Publication details

The article was received on 26 Jan 2010, accepted on 25 Mar 2010 and first published on 14 May 2010


Article type: Paper
DOI: 10.1039/C0JM00159G
Citation: J. Mater. Chem., 2010,20, 5086-5094
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    Facile synthesis of size-controllable monodispersed ferrite nanospheres

    S. Xuan, F. Wang, Y. J. Wang, J. C. Yu and K. C. Leung, J. Mater. Chem., 2010, 20, 5086
    DOI: 10.1039/C0JM00159G

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