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Fe3O4–SiO2 nanocomposites obtained via alkoxide and colloidal route

  • Nanomaterials and Thin Films
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Abstract

The magnetic nanocomposite materials represent an important class of nanomaterials extensively studied nowadays due to their varied applications from medical diagnostic to storage information. The iron oxides in silica matrix systems are highly investigated. The sol-gel method is a suitable way of preparation of Fe3O4-SiO2 nanocomposite materials, since this method allowed the preparation of nanocomposite materials with narrow size distribution of magnetite in silica matrix. In the present work, nanocomposite materials in the Fe3O4-SiO2 system were prepared by sol-gel method via alkoxide and aqueous route. As SiO2 sources, tetraethoxysilan (TEOS) for the alkoxide route, as well as silica sol Ludox (30%) for the aqueous route, were used. This study shows the influence of the type of silica matrix on the structure, size, and distribution of the Fe3O4 nanoparticles in the Fe3O4-SiO2 systems. The gels were annealed at 550°C in order to consolidate the matrices. The structural characterization of the obtained materials via the two preparation routes was performed by DTA/TGA analysis, X-ray diffraction, IR and Mössbauer spectroscopy, Transmission Electron Microscopy (TEM) and Selected Area Electron Diffraction (SAED).

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Rutgers, The State University of NJ, 607 Taylor Road, Piscataway, NJ, 08854, USA

    A. Jitianu

  2. Institute of Physical Chemistry, 202 Splaiul Independentei, 060021, Bucharest, Romania

    A. Jitianu, M. Raileanu, M. Crisan, M. Jitianu & M. Zaharescu

  3. National Institute for Physics of Materials, P.O. Box. MG 07, 77125, Bucharest Magurele, Romania

    D. Predoi

  4. Clarkson University, CAMP, 8 Clarkson Ave., Box 5814, Potsdam, NY, 13699-5814, USA

    M. Jitianu

  5. School of Materials Engineering, Purdue University, 501 Northwestern Ave., West Lafayette, IN, 47907-2044, USA

    L. Stanciu

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  1. A. Jitianu
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  2. M. Raileanu
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  3. M. Crisan
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  7. M. Zaharescu
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Correspondence to A. Jitianu.

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Jitianu, A., Raileanu, M., Crisan, M. et al. Fe3O4–SiO2 nanocomposites obtained via alkoxide and colloidal route. J Sol-Gel Sci Technol 40, 317–323 (2006). https://doi.org/10.1007/s10971-006-9321-7

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  • DOI: https://doi.org/10.1007/s10971-006-9321-7

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