Abstract
Ultrafine magnetite particles are prepared through an electrochemical process, at room temperature, from an iron-based electrode immersed in an alkaline aqueous medium containing complexing compounds. XRD and chemical analysis indicate that the product is pure magnetite, Fe3O4. The size and morphology of the particles are studied by SEM. The magnetite nanoparticles present a magnetoresistance of almost 3%, at 300 K, under a magnetic field of 1 T. A reactive mechanism for the electrochemical process is proposed.
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Acknowledgements
The authors are grateful to Mr. Christian Haut (ICMMO, Université Paris Sud – XI), who provided the SEM micrographs of magnetite.
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Franger, S., Berthet, P. & Berthon, J. Electrochemical synthesis of Fe3O4 nanoparticles in alkaline aqueous solutions containing complexing agents. J Solid State Electrochem 8, 218–223 (2004). https://doi.org/10.1007/s10008-003-0469-6
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DOI: https://doi.org/10.1007/s10008-003-0469-6