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

Luca Camilli; Manuela Scarselli; Silvano Del Gobbo; Paola Castrucci; Francesca Romana Lamastra; Francesca Nanni; Eric Gautron; Serge Lefrant; Franco D'Orazio; Franco Lucari; Maurizio De Crescenzi

doi:10.1016/j.carbon.2011.09.034

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

Luca Camilli^*, Manuela Scarselli, Silvano Del Gobbo, Paola Castrucci, Francesca Romana Lamastra, Francesca Nanni, Eric Gautron, Serge Lefrant, Franco D'Orazio, Franco Lucari, Maurizio De Crescenzi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

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 γ- or α-phase, although iron in the original alloy is in γ-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 α-phase, the magnetic anisotropy and the single domain character of the Fe nanoparticles explain their magnetic behavior.

Original language	English (US)
Pages (from-to)	718-721
Number of pages	4
Journal	Carbon
Volume	50
Issue number	2
DOIs	https://doi.org/10.1016/j.carbon.2011.09.034
State	Published - Feb 2012
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Materials Science

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title = "High coercivity of iron-filled carbon nanotubes synthesized on austenitic stainless steel",

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 γ- or α-phase, although iron in the original alloy is in γ-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 α-phase, the magnetic anisotropy and the single domain character of the Fe nanoparticles explain their magnetic behavior.",

author = "Luca Camilli and Manuela Scarselli and {Del Gobbo}, Silvano and Paola Castrucci and Lamastra, {Francesca Romana} and Francesca Nanni and Eric Gautron and Serge Lefrant and Franco D'Orazio and Franco Lucari and {De Crescenzi}, Maurizio",

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AU - Camilli, Luca

AU - Scarselli, Manuela

AU - Del Gobbo, Silvano

AU - Castrucci, Paola

AU - Lamastra, Francesca Romana

AU - Nanni, Francesca

AU - Gautron, Eric

AU - Lefrant, Serge

AU - D'Orazio, Franco

AU - Lucari, Franco

AU - De Crescenzi, Maurizio

PY - 2012/2

Y1 - 2012/2

N2 - 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 γ- or α-phase, although iron in the original alloy is in γ-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 α-phase, the magnetic anisotropy and the single domain character of the Fe nanoparticles explain their magnetic behavior.

AB - 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 γ- or α-phase, although iron in the original alloy is in γ-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 α-phase, the magnetic anisotropy and the single domain character of the Fe nanoparticles explain their magnetic behavior.

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SP - 718

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

Abstract

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