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Research article - Peer-reviewed, 2013

Facile non-hydrolytic synthesis of highly water dispersible, surfactant free nanoparticles of synthetic MFe2O4 (M-Mn2+, Fe2+, Co2+, Ni2+) ferrite spinel by a modified Bradley reaction

Pazik, Robert; Piasecka, Emilia; Malecka, Malgorzata; Kessler, Vadim; Idzikowski, Bogdan; Śniadecki, Zbigniew; Wiglusz, Rafal


A series of the highly crystalline MFe2O4 ferrite spinel nanoparticles were synthesized via a modified Bradley reaction using microwave stimulation. Particle size was estimated using theoretical calculations from the X-ray data (Scherrer and Rietveld methods) as well as by direct experimental techniques such as TEM, DLS and NTA. The calculated average grain size for dry powders is in the range 10 to 23 nm. Hydrodynamic size was measured using DLS on non-modified, surfactant free particles of the whole MFe2O4 series. Raman spectra used for additional verification of the structure features of the produced spinel phases showed strong asymmetric behavior of the A(1g) mode, which was deconvoluted revealing additional components. Among all the products the lowest site inversion was found for the manganese ferrite (MnFe2O4). The oxidation of Fe3O4 leading to the formation of the Fe2O3 hematite phase induced by laser irradiation was observed. Magnetic characterization of the MFe2O4 family was carried out, showing that superparamagnetic blocking temperatures and calculated anisotropy constants K are in good agreement with the data for similar fine-particle systems.

Published in

RSC Advances
2013, volume: 3, number: 30, pages: 12230-12243

Authors' information

Pazik, Robert
Piasecka, Emilia
Polish Academy of Sciences (PAN)
Malecka, Malgorzata
Swedish University of Agricultural Sciences, Department of Chemistry
Idzikowski, Bogdan
Polish Academy of Sciences (PAN)
Śniadecki, Zbigniew
Polish Academy of Sciences (PAN)
Wiglusz, Rafal
Polish Academy of Sciences (PAN)

UKÄ Subject classification

Other Medical Sciences not elsewhere specified
Inorganic Chemistry
Medical Bioscience
Materials Chemistry

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