In this paper we present a ten minutes' synthesis to obtain magnetite nanoparticles by co-precipitation under sonication (MP-US) at room temperature in the absence of any stabilizer and their characterization. For comparison magnetite particles were synthesized by co-precipitation under heat (MP-Heat). The magnetite nanoparticles were characterized and the colloidal stability of magnetite dispersions was evaluated. MP-US particles presented mean diameter of 15 nm and isoelectric point (pI) of 6.5, while MP-Heat particles were sub-micrometric and presented pI at 5.4. At pH 6 these characteristics made the aqueous MP-US dispersions more stable than the aqueous MP-Heat dispersions. Further cross-linked xanthan films were immersed for ten seconds in the aqueous dispersion at pH 6 and room temperature. Scanning transmission electron microscopy revealed that the MP-US nanoparticles assumed a spatial distribution in the xanthan matrix, resulting in scaffolds with improved coercivity in comparison to bare MP-US particles and suitable for the proliferation of fibroblasts, particularly when exposed to external static magnetic field1.1. Bueno, VB; Silva, AM; Barbosa, LRS; Catalani, LH; Teixeira-Neto, E.; Cornejo, DR; Petri, DFS, Chem Commun. 2013  , 49, 9911.DOI: 10.1039/c3cc42277a

Magnetic nanocomposites for cell growth

247th National Meeting (2014)

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