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Characterization of Magnetic Nanoparticles Using Energy-Selected Transmission Electron Microscopy

Published online by Cambridge University Press:  27 November 2002

María J. Sayagués
Affiliation:
Instituto de Ciencia de Materiales de Sevilla, CSIC, Américo Vespucio s/n, 41092—Sevilla, Spain
Teresa C. Rojas
Affiliation:
Instituto de Ciencia de Materiales de Sevilla, CSIC, Américo Vespucio s/n, 41092—Sevilla, Spain
Asunción Fernández
Affiliation:
Instituto de Ciencia de Materiales de Sevilla, CSIC, Américo Vespucio s/n, 41092—Sevilla, Spain
Rafal E. Dunin-Borkowski
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom Rafal E. Dunin-Borkowski's present address is Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge CB2 3QZ, United Kingdom
Ron C. Doole
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom
John L. Hutchison
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom

Abstract

Fe, Co, and Ni magnetic nanoparticles have been characterized using energy-selected imaging in a high-resolution transmission electron microscope. The samples comprised Fe/FeOx and Co/CoOx nanoparticles synthesized by inert gas evaporation and a Ni/C nano-composite prepared by a sonochemical method. All of the particles examined were found to be between 5 and 30 nm in size, with the Fe and Co crystals coated in 5–10 nm of metal oxide layer and the Ni metallic crystallites embedded in an amorphous carbon spherical matrix.

Type
MATERIALS APPLICATIONS
Copyright
2002 Microscopy Society of America

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