| Abstract
| - Sol−gel one-step processing of the Fe(II) alkoxide [Fe(OBut)2(THF)]2 and tetraethyl orthosilicate (TEOS) atvarious ratios afforded new silica−iron oxide magnetic nanocomposite materials, ranging in shape fromnanocrystals to nanorods depending on the percentage of TEOS added. The nanocomposites have beeninvestigated by Fourier transform infrared and Raman spectroscopy, X-ray diffraction, 57Fe Mössbauerspectroscopy, magnetization measurements, transmission electron microscopy, scanning transmission electronmicroscopy, and energy dispersive X-ray analysis. These silica-coated magnetic materials might have a rangeof potential applications in biotechnology, medicine (e.g., as magnetic fluids for MRI), catalysis, and magneticstorage.
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