Properties of Cs-intercalated single wall carbon nanotubes investigated by 133Cs Nuclear Magnetic resonance

Handle URI:
http://hdl.handle.net/10754/562380
Title:
Properties of Cs-intercalated single wall carbon nanotubes investigated by 133Cs Nuclear Magnetic resonance
Authors:
Schmid, Marc R.; Mahfouz, Remi ( 0000-0003-0981-0440 ) ; Bouhrara, Mohamed; Saih, Youssef; Mehring, Michael; Basset, Jean-Marie ( 0000-0003-3166-8882 ) ; Goze-Bac, Christophe; Abou-Hamad, Edy
Abstract:
In the present study, we investigated Cs-intercalated single wall carbon nanotubes (SWCNTs) using 133Cs Nuclear Magnetic resonance. We show that there are two types of Cs cations depending on the insertion level. Indeed, at low concentrations, Static spectra analysis shows that the Cs (α)+ species are fully ionized, i.e. α equal ca.1, while at higher concentrations a second paramagnetically shifted line appears, indicating the formation of Cs (β)+ ions with β < α ∼ +1. At low concentrations and low temperatures the Cs (α)+ ions exhibit a weak hyperfine coupling to the SWCNT conduction electrons, whereas, at higher temperatures, a thermally activated slow-motion diffusion process of the Cs (α)+ ions occurs along the interstitial channels present within the carbon nanotube bundles. At high concentrations, the Cs (β)+ ions seem to occupy well defined positions relative to the carbon lattice. As a matter of fact, the Korringa relaxation behavior suggests a strong hyperfine coupling between Cs nuclei and conduction electrons in the carbon nanotubes and a partial charge transfer, which suggest a plausible Cs(6s)-C(2p) hybridization. © 2012 Elsevier Ltd. All rights reserved.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC); Chemical Science Program
Publisher:
Elsevier BV
Journal:
Carbon
Issue Date:
Nov-2012
DOI:
10.1016/j.carbon.2012.07.016
Type:
Article
ISSN:
00086223
Sponsors:
C. Goze-Bac is grateful to the Region Languedoc-Roussillon for its financial support.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorSchmid, Marc R.en
dc.contributor.authorMahfouz, Remien
dc.contributor.authorBouhrara, Mohameden
dc.contributor.authorSaih, Youssefen
dc.contributor.authorMehring, Michaelen
dc.contributor.authorBasset, Jean-Marieen
dc.contributor.authorGoze-Bac, Christopheen
dc.contributor.authorAbou-Hamad, Edyen
dc.date.accessioned2015-08-03T10:03:10Zen
dc.date.available2015-08-03T10:03:10Zen
dc.date.issued2012-11en
dc.identifier.issn00086223en
dc.identifier.doi10.1016/j.carbon.2012.07.016en
dc.identifier.urihttp://hdl.handle.net/10754/562380en
dc.description.abstractIn the present study, we investigated Cs-intercalated single wall carbon nanotubes (SWCNTs) using 133Cs Nuclear Magnetic resonance. We show that there are two types of Cs cations depending on the insertion level. Indeed, at low concentrations, Static spectra analysis shows that the Cs (α)+ species are fully ionized, i.e. α equal ca.1, while at higher concentrations a second paramagnetically shifted line appears, indicating the formation of Cs (β)+ ions with β < α ∼ +1. At low concentrations and low temperatures the Cs (α)+ ions exhibit a weak hyperfine coupling to the SWCNT conduction electrons, whereas, at higher temperatures, a thermally activated slow-motion diffusion process of the Cs (α)+ ions occurs along the interstitial channels present within the carbon nanotube bundles. At high concentrations, the Cs (β)+ ions seem to occupy well defined positions relative to the carbon lattice. As a matter of fact, the Korringa relaxation behavior suggests a strong hyperfine coupling between Cs nuclei and conduction electrons in the carbon nanotubes and a partial charge transfer, which suggest a plausible Cs(6s)-C(2p) hybridization. © 2012 Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipC. Goze-Bac is grateful to the Region Languedoc-Roussillon for its financial support.en
dc.publisherElsevier BVen
dc.titleProperties of Cs-intercalated single wall carbon nanotubes investigated by 133Cs Nuclear Magnetic resonanceen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.contributor.departmentChemical Science Programen
dc.identifier.journalCarbonen
dc.contributor.institutionPhysikalisches Institut, Universität Stuttgart, D-70569 Stuttgart, Germanyen
dc.contributor.institutionNanoNMRI Group, UMR5587, Université Montpellier II, Place E. Bataillon, 34095 Montpellier, Cedex 5, Franceen
kaust.authorMahfouz, Remien
kaust.authorBouhrara, Mohameden
kaust.authorSaih, Youssefen
kaust.authorBasset, Jean-Marieen
kaust.authorAbou-Hamad, Edyen
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