Synthesis of biocompatible magnetic iron oxide (γ-Fe 2O3 and Fe3O4) nanoparticles by a modified polyol process for biomedical applications

Georgia Basina, Ioannis Panagiotopoulos, Eamonn Devlin, George Hadjipanayis, Levent Colak, Costas Hadjipanayis, Hui Mao, Georgios Diamantopoulos, Michael Fardis, Georgios Papavassiliou, Dimitris Niarchos, Vasilis Tzitzios

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Highly crystalline superparamagnetic Fe3O4 nanoparticles coated by polyvinylpyrrolidone (PVP) were prepared by simultaneous thermal decomposition of ferrous and ferric inorganic salts in polyethylene glycol (PEG) with molecular weight 200. The magnetic particles have a diameter in the range of 8-15 nm, and after exchange with citric acid diammonium salt, they transform into very stable super hydrophilic colloidal solutions. The presence of magnetite phase was confirmed using powder X-rays diffraction (XRD) and Mössbauer spectroscopy, while thermogravimetric analysis and FT-IR spectroscopy confirmed the presence of PVP or citrate anions on the nanoparticles surface. The magnetic properties revealed superparamagnetic behavior, with the composite material showing a saturation magnetization up to 57 emu/g. The Fe3O4 nanoparticles prepared by this modified polyol process are suitable for biomedical applications because of the biocompatibility of citrate anions. Magnetic hyperthermia experiments in neutral water solutions shows that the particles induce fast heating rates with specific absorption rate (SAR) values which reached 57.53 W/gFe, when the concentration of iron is 11.2 mgFe/ml.

Original languageEnglish
Title of host publicationFunctional Oxide Nanostructures and Heterostructures
PublisherMaterials Research Society
Number of pages7
ISBN (Print)9781617822209
StatePublished - 2010
Externally publishedYes

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


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