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Hindawi, Journal of Nanomaterials, (2013), p. 1-6, 2013

DOI: 10.1155/2013/713475

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Electromagnetic properties of inner double walled carbon nanotubes investigated by nuclear magnetic resonance

Journal article published in 2013 by M. Bouhrara ORCID, E. Abou-Hamad ORCID, G. Alabedi, I. Al-Taie, Y. Kim, Thomas Wagberg, C. Goze-Bac
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

The nuclear magnetic resonance (NMR) analytical technique was used to investigate the double walled carbon nanotubes (DWNTs) electromagnetic properties of inner walls. The local magnetic and electronic properties of inner nanotubes in DWNTs were analyzed using 25%13C enriched C60by which the effect of dipolar coupling could be minimized. The diamagnetic shielding was determined due to the ring currents on outer nanotubes in DWNTs. The NMR chemical shift anisotropy (CSA) spectra and spin-lattice relaxation studies reveal the metallic properties of the inner nanotubes with a signature of the spin-gap opening below 70 K.