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Terahertz Spectroscopy of Single-Walled Carbon Nanotubes in a Polymer Film: Observation of Low-Frequency Phonons

hal.structure.identifierDepartment of Physics
hal.structure.identifierCenter for Ultrafast Laser Applications
dc.contributor.authorKUMAR, Sunil
hal.structure.identifierDepartment of Physics
hal.structure.identifierCenter for Ultrafast Laser Applications
dc.contributor.authorKAMARAJU, N.
hal.structure.identifierDepartment of Physics
dc.contributor.authorKARTHIKEYAN, B.
hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
dc.contributor.authorTONDUSSON, Marc
hal.structure.identifierCentre de physique moléculaire optique et hertzienne [CPMOH]
dc.contributor.authorFREYSZ, Eric
hal.structure.identifierDepartment of Physics
hal.structure.identifierCenter for Ultrafast Laser Applications
dc.contributor.authorSOOD, A. K.
dc.date.created2010-04-06
dc.date.issued2010-07-29
dc.identifier.issn1932-7447
dc.description.abstractEnWe investigate the dielectric response of single-walled carbon nanotubes dispersed in poly(vinyl alcohol) matrix by using terahertz time domain spectroscopy. Frequency-dependent real and imaginary parts of the complex dielectric function are measured experimentally in the terahertz regime. The low-frequency phonons of carbon nanotubes, though predicted theoretically, are directly observed for the first time at frequencies 0.26, 0.60, and 0.85 THz. Further, a broad resonance is observed at 1.15 THz associated with the longitudinal acoustic mode of vibration of straight-chain segments of the long polymeric molecules in the film. The latter is observed at 1.24 THz for a pristine polymer film and has been used to derive the size of crystalline lamellae in the film.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enTerahertz Spectroscopy of Single-Walled Carbon Nanotubes in a Polymer Film: Observation of Low-Frequency Phonons
dc.typeArticle de revue
dc.identifier.doi10.1021/jp103105h
bordeaux.journalJournal of Physical Chemistry C
bordeaux.page12446-12450
bordeaux.volume114
bordeaux.issue29
bordeaux.peerReviewedoui
hal.identifierhal-00506063
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00506063v1
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