NMR strategies to study the local magnetic properties of carbon nanotubes

Edy Abou-Hamad; Younghyun Kim; Mohamed Bouhrara; Youssef Saih; Thomas Wågberg; David E. Luzzi; Christophe Goze-Bac

doi:10.1016/j.physb.2011.12.012

NMR strategies to study the local magnetic properties of carbon nanotubes

Edy Abou-Hamad, Younghyun Kim, Mohamed Bouhrara, Youssef Saih, Thomas Wågberg, David E. Luzzi, Christophe Goze-Bac

Physical Sciences and Engineering

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

2 Scopus citations

Abstract

The local magnetic properties of the one dimensional inner space of the nanotubes are investigated using 13C nuclear magnetic resonance spectroscopy of encapsulated fullerene molecules inside single walled carbon nanotubes. Isotope engineering and magnetically purified nanotubes have been advantageously used on our study to discriminate between the different diamagnetic and paramagnetic shifts of the resonances. Ring currents originating from the π electrons circulating on the nanotube, are found to actively screen the applied magnetic field by -36.9 ppm. Defects and holes in the nanotube walls cancel this screening locally. What is interesting, that at high magnetic fields, the modifications of the NMR resonances of the molecules from free to encapsulated can be exploited to determine some structural characteristics of the surrounding nanotubes, never observed experimentally. © 2011 Elsevier B.V. All rights reserved.

Original language	English (US)
Pages (from-to)	740-742
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	407
Issue number	4
DOIs	https://doi.org/10.1016/j.physb.2011.12.012
State	Published - Feb 2012

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering
Condensed Matter Physics

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10.1016/j.physb.2011.12.012

Cite this

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abstract = "The local magnetic properties of the one dimensional inner space of the nanotubes are investigated using 13C nuclear magnetic resonance spectroscopy of encapsulated fullerene molecules inside single walled carbon nanotubes. Isotope engineering and magnetically purified nanotubes have been advantageously used on our study to discriminate between the different diamagnetic and paramagnetic shifts of the resonances. Ring currents originating from the π electrons circulating on the nanotube, are found to actively screen the applied magnetic field by -36.9 ppm. Defects and holes in the nanotube walls cancel this screening locally. What is interesting, that at high magnetic fields, the modifications of the NMR resonances of the molecules from free to encapsulated can be exploited to determine some structural characteristics of the surrounding nanotubes, never observed experimentally. {\textcopyright} 2011 Elsevier B.V. All rights reserved.",

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AU - Abou-Hamad, Edy

AU - Kim, Younghyun

AU - Bouhrara, Mohamed

AU - Saih, Youssef

AU - Wågberg, Thomas

AU - Luzzi, David E.

AU - Goze-Bac, Christophe

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AB - The local magnetic properties of the one dimensional inner space of the nanotubes are investigated using 13C nuclear magnetic resonance spectroscopy of encapsulated fullerene molecules inside single walled carbon nanotubes. Isotope engineering and magnetically purified nanotubes have been advantageously used on our study to discriminate between the different diamagnetic and paramagnetic shifts of the resonances. Ring currents originating from the π electrons circulating on the nanotube, are found to actively screen the applied magnetic field by -36.9 ppm. Defects and holes in the nanotube walls cancel this screening locally. What is interesting, that at high magnetic fields, the modifications of the NMR resonances of the molecules from free to encapsulated can be exploited to determine some structural characteristics of the surrounding nanotubes, never observed experimentally. © 2011 Elsevier B.V. All rights reserved.

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NMR strategies to study the local magnetic properties of carbon nanotubes

Abstract

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ASJC Scopus subject areas

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