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Camilli, L., Scarselli, M., Del Gobbo, S., Castrucci, P., Lamastra, F. R., Nanni, F., Gautron, E., Lefrant, S., D'Orazio, F., Lucari, F. & De Crescenzi, M. (2012) High coercivity of iron-filled carbon nanotubes synthesized on austenitic stainless steel. Carbon, 50 718–721.
Added by: Laurent Cournède (2016-03-10 21:28:40) |
| Type de référence: Article DOI: 10.1016/j.carbon.2011.09.034 Numéro d'identification (ISBN etc.): 0008-6223 Clé BibTeX: Camilli2012a Voir tous les détails bibliographiques  |
Catégories: PMN Mots-clés: magnetic-properties, Multilayers Créateurs: Camilli, Castrucci, D'Orazio, De Crescenzi, Del Gobbo, Gautron, Lamastra, Lefrant, Lucari, Nanni, Scarselli Collection: Carbon |
Consultations : 1/572
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| Résumé |
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Multiwalled carbon nanotubes synthesized directly on austenitic stainless steel result in being filled with pure iron nanoparticles. X-ray diffraction shows that the nanoparticles are either in the gamma- or alpha-phase, although iron in the original alloy is in gamma-phase because of the presence of nickel. This phase transformation is due to the selective extraction of iron, performed by carbon nanotubes during their growth. A high coercivity of iron-filled carbon nanotubes is measured although the starting steel is paramagnetic. The presence of the cc-phase, the magnetic anisotropy and the single domain character of the Fe nanoparticles explain their magnetic behavior. (C) 2011 Elsevier Ltd. All rights reserved.
Added by: Laurent Cournède |