Title: Synthesis, characterisation of SiO₂ and TiO₂ coated Fe₃O₄ nanoparticles for biomedical applications

Authors: S. Rashdan, M. Bououdina, A. Al-Saie, E. Ghanem, A. Bin-Thani, S. Althawadi

Addresses: Department of Chemistry, College of Science, University of Bahrain, P.O. Box 32038, Kingdom of Bahrain. ' Nanotechnology Centre, University of Bahrain, P.O. Box 32038, Kingdom of Bahrain; Department of Physics, College of Science, University of Bahrain, P.O. Box 32038, Kingdom of Bahrain. ' Nanotechnology Centre, University of Bahrain, P.O. Box 32038, Kingdom of Bahrain; Department of Physics, College of Science, University of Bahrain, P.O. Box 32038, Kingdom of Bahrain. ' Department of Biology, College of Science, University of Bahrain, P.O. Box 32038, Kingdom of Bahrain. ' Department of Biology, College of Science, University of Bahrain, P.O. Box 32038, Kingdom of Bahrain. ' Department of Biology, College of Science, University of Bahrain, P.O. Box 32038, Kingdom of Bahrain

Abstract: Silica and titania coated Fe₃O₄ nanoparticles Fe₃O₄(1)-SiO₂ and Fe₃O₄(2)-TiO₂ were prepared using thermal hydrolysis method. The structure of the core-shell nanostructures was determined by FT-IR and XRD analysis. FT-IR spectra for Fe₃O₄(1)-SiO₂ and Fe₃O₄(2)-TiO₂ show peaks corresponding to the stretching vibrations of Si-O and Ti-O groups, respectively. The surface modification of Fe₃O₄ nanoparticles with SiO₂ or TiO₂ did not lead to their phase change as confirmed by XRD diffraction analysis. Additionally, both samples show ferromagnetic behaviour as the saturation magnetisation values for Fe₃O₄(1)-SiO₂ and Fe₃O₄(2)-TiO₂ samples decrease by 20% and 33%, respectively with an increase in the shell thickness by 10 nm and 2 nm, respectively.

Keywords: nanoparticles; coatings; X-ray diffraction; magnetic properties; nanotechnolgy; biomedical engineering; silica; titania; ferromagnetic behaviour; shell thickness.

DOI: 10.1504/IJMATEI.2010.035167

International Journal of Materials Engineering Innovation, 2010 Vol.1 No.3/4, pp.426 - 435

Published online: 10 Sep 2010 *

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