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Manganese iron oxide superparamagnetic powder by mechanochemical processing. Nanoparticles functionalization and dispersion in a nanofluid

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Abstract

Manganese ferrite nanoparticles were synthesized using a High-Energy Ball-Milling mechanochemical method. After 1 h of milling, the process produces a material consisting of single crystalline domain nanoparticles having a diameter of about 8 nm. Chemical properties of the synthesized powders allow an easy functionalization with citric acid. Both as-obtained and functionalized samples show superparamagnetic behaviour at room temperature, and the functionalized powder is stably dispersible in aqueous media at physiological pH. The average hydrodynamic diameter is equal to ~60 nm. Nanoparticles obtained by the reported High-Energy Ball-Milling method can be synthesized with high yield and low costs and can be successfully utilized in ferrofluids development for biomedical applications.

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Acknowledgments

This study was partly supported by MIUR (Italian Ministry of Research and University) in the frame of the TEPSI project. The authors thank Dr Luciano Pilloni for his kind help with the SEM studies.

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Correspondence to M. Bellusci.

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Bellusci, M., Aliotta, C., Fiorani, D. et al. Manganese iron oxide superparamagnetic powder by mechanochemical processing. Nanoparticles functionalization and dispersion in a nanofluid. J Nanopart Res 14, 904 (2012). https://doi.org/10.1007/s11051-012-0904-7

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  • DOI: https://doi.org/10.1007/s11051-012-0904-7

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