Brief Communication

Journal of Nanoparticle Research

, Volume 11, Issue 5, pp 1247-1250

Hydrothermal synthesis of large maghemite nanoparticles: influence of the pH on the particle size

  • Olivier HornerAffiliated withLaboratoire Colloïdes et Interfaces Chargés, UMR CNRS, Université Pierre et Marie Curie, ESPCI 7612 Email author 
  • , Sophie NeveuAffiliated withLaboratoire Colloïdes et Interfaces Chargés, UMR CNRS, Université Pierre et Marie Curie, ESPCI 7612
  • , Sophie de MontredonAffiliated withLaboratoire Colloïdes et Interfaces Chargés, UMR CNRS, Université Pierre et Marie Curie, ESPCI 7612
  • , Jean-Michel SiaugueAffiliated withLaboratoire Colloïdes et Interfaces Chargés, UMR CNRS, Université Pierre et Marie Curie, ESPCI 7612
  • , Valérie CabuilAffiliated withLaboratoire Colloïdes et Interfaces Chargés, UMR CNRS, Université Pierre et Marie Curie, ESPCI 7612

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Abstract

Maghemite nanoparticles with sizes in the range 10–110 nm and good monodispersity have been synthesized by co precipitation at room temperature from Fe2+ and Fe3+ ions by a (N(CH3)4OH) solution, followed by an hydrothermal treatment at 200 °C and an oxidation step with Fe(NO3)3. The influence of the incubation time (at 200 °C) and of the pH of the autoclaved solution on the particles size has been studied. It was found that the pH value allows to tune the size of the maghemite particles.

Keywords

Maghemite nanoparticles Hydrothermal synthesis Autoclave Colloids