Synthesis of magnetite (Fe3O4) nanoparticles without surfactants at room temperature
2007; Elsevier BV; Volume: 61; Issue: 23-24 Linguagem: Inglês
10.1016/j.matlet.2007.02.018
ISSN1873-4979
AutoresIsidoro Martínez-Mera, Manuel Espinosa-Pesqueira, R. Pérez-Hernández, J. Arenas-Alatorre,
Tópico(s)Nanoparticle-Based Drug Delivery
ResumoIron oxide nanoparticles in the interval of 4–43 nm were synthesized by a colloidal method at room temperature, without use of surfactants and using precursors like FeCl3·6H2O and FeCl2·4H2O; deionizated water free of dissolved oxygen and ammonia solution (29% vol.) and using several aging times (2, 5 and 10 min). A detailed study by X- ray diffraction (XRD), Conventional Transmission Electron Microscopy (CTEM), High-Resolution Transmission Electron Microscopy (HRTEM) and electron diffraction patterns showed that with a reaction time less than 5 min nanoparticles of magnetite phase (Fe3O4) were synthesized, and with a bigger time of reaction the lepidocrocite phase (FeO(OH)) was identified. The minor particle average size measured was 6 nm in the sample, 0.0125 M with 2 min of aging time (0.0125M2 m). In addition it was possible to obtain a narrow nanoparticle size dispersion from 4 to 10 nm for small aging times.
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