Properties of K,Rb-intercalated C60 encapsulated inside carbon nanotubes called peapods derived from nuclear magnetic resonance

Handle URI:
http://hdl.handle.net/10754/578846
Title:
Properties of K,Rb-intercalated C60 encapsulated inside carbon nanotubes called peapods derived from nuclear magnetic resonance
Authors:
Mahfouz, Remi ( 0000-0003-0981-0440 ) ; Bouhrara, M.; Kim, Y.; Wågberg, T.; Goze-Bac, C. ( 0000-0002-9063-4140 ) ; Abou-Hamad, Edy
Abstract:
We present a detailed experimental study on how magnetic and electronic properties of Rb,K-intercalated C60 encapsulated inside carbon nanotubes called peapods can be derived from 13C nuclear magnetic resonance investigations. Ring currents do play a basic role in those systems; in particular, the inner cavities of nanotubes offer an ideal environment to investigate the magnetism at the nanoscale. We report the largest diamagnetic shifts down to −68.3 ppm ever observed in carbon allotropes, which is connected to the enhancement of the aromaticity of the nanotube envelope upon intercalation. The metallization of intercalated peapods is evidenced from the chemical shift anisotropy and spin-lattice relaxation (T1) measurements. The observed relaxation curves signal a three-component model with two slow and one fast relaxing components. We assigned the fast component to the unpaired electrons charged C60 that show a phase transition near 100 K. The two slow components can be rationalized by the two types of charged C60 at two different positions with a linear regime following Korringa behavior, which is typical for metallic system and allow us to estimate the density of sate at Fermi level n(EF).
KAUST Department:
Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)
Citation:
Properties of K,Rb-intercalated C60 encapsulated inside carbon nanotubes called peapods derived from nuclear magnetic resonance 2015, 118 (11):114305 Journal of Applied Physics
Publisher:
AIP Publishing
Journal:
Journal of Applied Physics
Issue Date:
18-Sep-2015
DOI:
10.1063/1.4931146
Type:
Article
ISSN:
0021-8979; 1089-7550
Additional Links:
http://scitation.aip.org/content/aip/journal/jap/118/11/10.1063/1.4931146
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; KAUST Catalysis Center (KCC)

Full metadata record

DC FieldValue Language
dc.contributor.authorMahfouz, Remien
dc.contributor.authorBouhrara, M.en
dc.contributor.authorKim, Y.en
dc.contributor.authorWågberg, T.en
dc.contributor.authorGoze-Bac, C.en
dc.contributor.authorAbou-Hamad, Edyen
dc.date.accessioned2015-09-29T05:31:40Zen
dc.date.available2015-09-29T05:31:40Zen
dc.date.issued2015-09-18en
dc.identifier.citationProperties of K,Rb-intercalated C60 encapsulated inside carbon nanotubes called peapods derived from nuclear magnetic resonance 2015, 118 (11):114305 Journal of Applied Physicsen
dc.identifier.issn0021-8979en
dc.identifier.issn1089-7550en
dc.identifier.doi10.1063/1.4931146en
dc.identifier.urihttp://hdl.handle.net/10754/578846en
dc.description.abstractWe present a detailed experimental study on how magnetic and electronic properties of Rb,K-intercalated C60 encapsulated inside carbon nanotubes called peapods can be derived from 13C nuclear magnetic resonance investigations. Ring currents do play a basic role in those systems; in particular, the inner cavities of nanotubes offer an ideal environment to investigate the magnetism at the nanoscale. We report the largest diamagnetic shifts down to −68.3 ppm ever observed in carbon allotropes, which is connected to the enhancement of the aromaticity of the nanotube envelope upon intercalation. The metallization of intercalated peapods is evidenced from the chemical shift anisotropy and spin-lattice relaxation (T1) measurements. The observed relaxation curves signal a three-component model with two slow and one fast relaxing components. We assigned the fast component to the unpaired electrons charged C60 that show a phase transition near 100 K. The two slow components can be rationalized by the two types of charged C60 at two different positions with a linear regime following Korringa behavior, which is typical for metallic system and allow us to estimate the density of sate at Fermi level n(EF).en
dc.language.isoenen
dc.publisherAIP Publishingen
dc.relation.urlhttp://scitation.aip.org/content/aip/journal/jap/118/11/10.1063/1.4931146en
dc.rightsArchived with thanks to Journal of Applied Physicsen
dc.titleProperties of K,Rb-intercalated C60 encapsulated inside carbon nanotubes called peapods derived from nuclear magnetic resonanceen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentKAUST Catalysis Center (KCC)en
dc.identifier.journalJournal of Applied Physicsen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDepartment of Chemistry, School of Science and Technology, Nazarbayev University, 010000 Astana, Republic of Kazakhstanen
dc.contributor.institutionDepartment of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USAen
dc.contributor.institutionDepartment of Physics, Umeå University, 901 87 Umeå, Swedenen
dc.contributor.institutionnanoNMRI Group, UMR5587, Université Montpellier II, Place E. Bataillon, 34095 Montpellier, Cedex 5, Franceen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorMahfouz, Remien
kaust.authorAbou-Hamad, Edyen
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