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Synthesis and characterization of silica-coated nanoparticles of magnetite

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Abstract

Magnetic nanoparticles coated with silica have been subjected of extensive, and, in many aspects, also intensive investigations because of their potential application in different technological fields, particularly in biomedicine. This work was conceived and is being carried out in two main parts: (1) synthesis of the ferrimagnetic nanoparticles, specifically magnetite, and (2) coating these particles with tetraethyl orthosilicate (TEOS). The nanosized magnetite sample was prepared by the reduction–precipitation and the nanomagnetite particles were coated by the sol-gel method, based on the hydrolysis of tetraethyl orthosilicate (TEOS). The so obtained materials were characterized with powder X-ray diffraction (XRD), FTIR spectroscopy, saturation magnetization measurements, and 57Fe Mössbauer spectroscopy at room temperature.

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Authors and Affiliations

  1. Departamento de Química, Universidade Federal de Minas Gerais, Campus-Pampulha, 31270-901, Belo Horizonte, Minas Gerais, Brazil

    R. V. Ferreira, I. L. S. Pereira, L. C. D. Cavalcante, J. D. Fabris & R. Z. Domingues

  2. Instituto Israelita de Ensino e Pesquisa Albert Einstein, IIEPAE, São Paulo, Brazil

    L. F. Gamarra & E. Amaro Jr.

  3. Instituto Butantan, São Paulo, 05503-900, Brazil

    S. M. Carneiro

  4. Departamento de Química/s10, Universidade Federal de Minas Gerais, Campus-Pampulha, CEP 31270-901, Minas Gerais, Brazil

    A. L. Andrade

Authors
  1. R. V. Ferreira
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  2. I. L. S. Pereira
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  3. L. C. D. Cavalcante
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  4. L. F. Gamarra
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  5. S. M. Carneiro
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  6. E. Amaro Jr.
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  7. J. D. Fabris
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  8. R. Z. Domingues
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  9. A. L. Andrade
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Correspondence to R. V. Ferreira.

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Ferreira, R.V., Pereira, I.L.S., Cavalcante, L.C.D. et al. Synthesis and characterization of silica-coated nanoparticles of magnetite. Hyperfine Interact 195, 265–274 (2010). https://doi.org/10.1007/s10751-009-0128-0

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  • DOI: https://doi.org/10.1007/s10751-009-0128-0

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