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Issue 47, 2017
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Stable Fe nanomagnets encapsulated inside vertically-aligned carbon nanotubes

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Abstract

Well-defined sized (5–10 nm) metallic iron nanoparticles (NPs) with body-centered cubic structure encapsulated inside the tip of millimeter-long vertically aligned carbon nanotubes (VACNTs) of uniform length have been investigated with high-resolution transmission electron microscopy and soft X-ray spectroscopy techniques. Surface-sensitive and chemically-selective measurements have been used to evaluate the magnetic properties of the encapsulated NPs. The encapsulated Fe NPs display magnetic remanence up to room temperature, low coercivity, high chemical stability and no significant anisotropy. Our surface-sensitive measurements combined with the specific morphology of the studied VACNTs allow us to pinpoint the contribution of the surface oxidized or hydroxidized iron catalysts present at the VACNT–substrate interface.

Graphical abstract: Stable Fe nanomagnets encapsulated inside vertically-aligned carbon nanotubes

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Article information


Submitted
31 iyl 2017
Accepted
16 noy 2017
First published
16 noy 2017

Phys. Chem. Chem. Phys., 2017,19, 32079-32085
Article type
Paper

Stable Fe nanomagnets encapsulated inside vertically-aligned carbon nanotubes

F. Bondino, E. Magnano, R. Ciancio, C. Castellarin Cudia, A. Barla, E. Carlino, F. Yakhou-Harris, N. Rupesinghe and C. Cepek, Phys. Chem. Chem. Phys., 2017, 19, 32079
DOI: 10.1039/C7CP05181F

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