Journal of Materials Science

, Volume 42, Issue 21, pp 9015–9020 | Cite as

A novel method to prepare magnetic nanoparticles: precipitation in bicontinuous microemulsions

  • Jesús Esquivel
  • Isabel A. Facundo
  • M. Esther Treviño
  • Raúl G. López
Article

Abstract

A novel method to prepare iron oxide nanoparticles by precipitation in bicontinuous microemulsions is reported. Precipitation reactions were carried out in microemulsions stabilized with a mixture of dodecyltrimethylammonium bromide/didodecyldimethylammonium bromide (3/2, w/w). Nanoparticles were characterized by X-ray diffraction, transmission electronic microscopy (TEM) and vibrating sample magnetometry (VSM), and consisted of magnetite or a mixture of magnetite and maghemite. The particles have an average diameter of 8 nm with a relatively narrow particle size distribution and show possible superparamagnetic behavior. Noticeably higher yields of precipitate are observed for this new approach in comparison with those typicall obtained using reverse microemulsions.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Jesús Esquivel
    • 1
    • 2
  • Isabel A. Facundo
    • 1
  • M. Esther Treviño
    • 1
  • Raúl G. López
    • 1
  1. 1.Centro de Investigación en Química AplicadaSaltilloMexico
  2. 2.Facultad de Ciencias QuímicasUniversidad Autónoma de CoahuilaSaltilloMexico

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