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.

Camilli, L., Scarselli, M.a., Del Gobbo, S., Castrucci, P., Lamastra, F., Nanni, F., et al. (2012). High coercivity of iron-filled carbon nanotubes synthesized on austenitic stainless steel. CARBON, 50(2), 718-721 [10.1016/j.carbon.2011.09.034].

High coercivity of iron-filled carbon nanotubes synthesized on austenitic stainless steel

Camilli, L;SCARSELLI, MANUELA ANGELA;CASTRUCCI, PAOLA;Lamastra, FR;NANNI, FRANCESCA;DE CRESCENZI, MAURIZIO
2012-02-01

Abstract

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.
feb-2012
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore ING-IND/22 - SCIENZA E TECNOLOGIA DEI MATERIALI
Settore FIS/03 - FISICA DELLA MATERIA
English
Con Impact Factor ISI
Finanziamento non UE EOARD FA8655-11-1-306
Camilli, L., Scarselli, M.a., Del Gobbo, S., Castrucci, P., Lamastra, F., Nanni, F., et al. (2012). High coercivity of iron-filled carbon nanotubes synthesized on austenitic stainless steel. CARBON, 50(2), 718-721 [10.1016/j.carbon.2011.09.034].
Camilli, L; Scarselli, Ma; Del Gobbo, S; Castrucci, P; Lamastra, F; Nanni, F; Gautron, E; Lefrant, S; D’Orazio, F; Lucari, F; DE CRESCENZI, M...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/42509
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