Electronic properties of Cs-intercalated single-walled carbon nanotubes derived from nuclear magnetic resonance

Handle URI:
http://hdl.handle.net/10754/554373
Title:
Electronic properties of Cs-intercalated single-walled carbon nanotubes derived from nuclear magnetic resonance
Authors:
Abou-Hamad, E; Goze-Bac, C; Nitze, F; Schmid, M; Aznar, R; Mehring, M; Wågberg, T
Abstract:
We report on the electronic properties of Cs-intercalated single-walled carbon nanotubes (SWNTs). A detailed analysis of the 13C and 133Cs nuclear magnetic resonance (NMR) spectra reveals an increased metallization of the pristine SWNTs under Cs intercalation. The 'metallization' of CsxC materials where x=0–0.144 is evidenced from the increased local electronic density of states (DOS) n(EF) at the Fermi level of the SWNTs as determined from spin–lattice relaxation measurements. In particular, there are two distinct electronic phases called α and β and the transition between these occurs around x=0.05. The electronic DOS at the Fermi level increases monotonically at low intercalation levels x<0.05 (α-phase), whereas it reaches a plateau in the range 0.05≤x≤0.143 at high intercalation levels (β-phase). The new β-phase is accompanied by a hybridization of Cs(6s) orbitals with C(sp2) orbitals of the SWNTs. In both phases, two types of metallic nanotubes are found with a low and a high local n(EF), corresponding to different local electronic band structures of the SWNTs.
KAUST Department:
KAUST Catalysis Center (KCC)
Citation:
Electronic properties of Cs-intercalated single-walled carbon nanotubes derived from nuclear magnetic resonance 2011, 13 (5):053045 New Journal of Physics
Journal:
New Journal of Physics
Issue Date:
24-May-2011
DOI:
10.1088/1367-2630/13/5/053045
Type:
Article
ISSN:
1367-2630
Additional Links:
http://stacks.iop.org/1367-2630/13/i=5/a=053045?key=crossref.08c8a1d853677f6620a61a972f1a1576
Appears in Collections:
Articles; KAUST Catalysis Center (KCC); KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorAbou-Hamad, Een
dc.contributor.authorGoze-Bac, Cen
dc.contributor.authorNitze, Fen
dc.contributor.authorSchmid, Men
dc.contributor.authorAznar, Ren
dc.contributor.authorMehring, Men
dc.contributor.authorWågberg, Ten
dc.date.accessioned2015-05-21T07:10:15Zen
dc.date.available2015-05-21T07:10:15Zen
dc.date.issued2011-05-24en
dc.identifier.citationElectronic properties of Cs-intercalated single-walled carbon nanotubes derived from nuclear magnetic resonance 2011, 13 (5):053045 New Journal of Physicsen
dc.identifier.issn1367-2630en
dc.identifier.doi10.1088/1367-2630/13/5/053045en
dc.identifier.urihttp://hdl.handle.net/10754/554373en
dc.description.abstractWe report on the electronic properties of Cs-intercalated single-walled carbon nanotubes (SWNTs). A detailed analysis of the 13C and 133Cs nuclear magnetic resonance (NMR) spectra reveals an increased metallization of the pristine SWNTs under Cs intercalation. The 'metallization' of CsxC materials where x=0–0.144 is evidenced from the increased local electronic density of states (DOS) n(EF) at the Fermi level of the SWNTs as determined from spin–lattice relaxation measurements. In particular, there are two distinct electronic phases called α and β and the transition between these occurs around x=0.05. The electronic DOS at the Fermi level increases monotonically at low intercalation levels x<0.05 (α-phase), whereas it reaches a plateau in the range 0.05≤x≤0.143 at high intercalation levels (β-phase). The new β-phase is accompanied by a hybridization of Cs(6s) orbitals with C(sp2) orbitals of the SWNTs. In both phases, two types of metallic nanotubes are found with a low and a high local n(EF), corresponding to different local electronic band structures of the SWNTs.en
dc.relation.urlhttp://stacks.iop.org/1367-2630/13/i=5/a=053045?key=crossref.08c8a1d853677f6620a61a972f1a1576en
dc.rightsArchived with thanks to New Journal of Physics http://creativecommons.org/licenses/by/3.0/en
dc.titleElectronic properties of Cs-intercalated single-walled carbon nanotubes derived from nuclear magnetic resonanceen
dc.typeArticleen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalNew Journal of Physicsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionnanoNMRI group, UMR5587, Université Montpellier II, Place E Bataillon, 34095 Montpellier Cedex 5, Franceen
dc.contributor.institutionDepartment of Physics, Umeå University, 90187 Umeå, Swedenen
dc.contributor.institutionPhysikalisches Institut, Universität Stuttgart, D-70569 Stuttgart, Germanyen
kaust.authorAbou-Hamad, Edyen
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