Raman spectroscopy of double- and triple-walled carbon nanotubes: fundamental, combination, and overtone modes

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dc.contributor Barbosa Neto, Newton M.
dc.contributor Mankey, Gary J.
dc.contributor Henderson, Conor
dc.contributor Tse, Wang-Kong
dc.contributor.advisor Araujo, Paulo T.
dc.contributor.author Hue, Jia Wern
dc.date.accessioned 2020-09-30T17:23:45Z
dc.date.available 2020-09-30T17:23:45Z
dc.date.issued 2020
dc.identifier.other u0015_0000001_0003565
dc.identifier.other Hue_alatus_0004D_14107
dc.identifier.uri http://ir.ua.edu/handle/123456789/6964
dc.description Electronic Thesis or Dissertation
dc.description.abstract A single-walled carbon nanotube (SWNT) is a graphene sheet rolled up into a tube. Double-walled (DWNT) and triple-walled carbon nanotubes (TWNT) are two and three coaxial SWNTs respectively. Isolated species of DWNTs and TWNTs were only recently probed and it can be considered as a new branch in carbon nanotube science. Phonons, and the combination of phonons and overtones are fundamental to understanding optical processes, transport and thermoelectricity in carbon nanotubes. To study these phonons, resonance Raman spectroscopy is employed on DWNT and TWNT bundles, as well as isolated TWNTs. The phonon modes of interest to this dissertation are the radial breathing mode (RBM), the G-band, and the M-band. From the RBM, it is learnt that for inner tubes with a tube diameter less than 1.2 nm, the curvature effects are dominant. Evidence for intertube interactions was found, although for outer tubes the environmental effects dominate. There was also evidence for commensurate and incommensurate tubes. Studying the G-band allowed for possible chiral indices to be identified for the middle and outer tubes of isolated TWNTs. In addition, the frequency shifts of TWNT G-band frequencies relative to SWNT G-band frequencies were studied and compared to TWNT G-band frequency shifts. As for the M-bands, phonon mode assignments for peaks between 1680 cm-1 to 1850 cm-1 were attempted.
dc.format.extent 124 p.
dc.format.medium electronic
dc.format.mimetype application/pdf
dc.language English
dc.language.iso en_US
dc.publisher University of Alabama Libraries
dc.relation.ispartof The University of Alabama Electronic Theses and Dissertations
dc.relation.ispartof The University of Alabama Libraries Digital Collections
dc.relation.hasversion born digital
dc.rights All rights reserved by the author unless otherwise indicated.
dc.subject.other Condensed matter physics
dc.subject.other Materials Science
dc.title Raman spectroscopy of double- and triple-walled carbon nanotubes: fundamental, combination, and overtone modes
dc.type thesis
dc.type text
etdms.degree.department University of Alabama. Department of Physics and Astronomy
etdms.degree.discipline Physics
etdms.degree.grantor The University of Alabama
etdms.degree.level doctoral
etdms.degree.name Ph.D.

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