Interlayer interactions and radial breathing mode in double- and triple-walled carbon nanotube bundles

ORAL

Abstract

A double-walled carbon nanotube (DWNT) can be considered a inner single-walled carbon nanotube (SWNT) protected by an outer SWNT. Likewise, a triple-walled carbon nanotube (TWNT) can considered an inner DWNT encapsulated by an outer SWNT. The signature in resonant Raman spectroscopy for carbon nanotubes is the radial breathing mode (RBM). For radial breathing modes (RBM), double- and triple-walled carbon nanotubes can be considered as coupled oscillators. The RBM frequency, ωRBM, is senstive to environmental factors and interlayer interactions. For interlayer interactions, it is necessary to take into account curvature effects, particularly for smaller tubes, whether the constituent tubes are commensurate, and whether the inner tubes are really isolated from the environment from the outer tubes. Another matter of interest is how do the magnitudes of the interlayer interactions compare. Resonant Raman spectra of a DWNT bundle and TWNT bundle were taken. From those spectra, chiral indices were assigned and tube diameters calculated. Then, a comparison to the SWNT ωRBM was made and the questions presented above answered.

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Presenters

  • Jia Wern Hue

    • Department of Physics and Astronomy, The University of Alabama, Tuscaloosa, Alabama 35487, USA

Authors

  • Jia Wern Hue

    • Department of Physics and Astronomy, The University of Alabama, Tuscaloosa, Alabama 35487, USA

  • Thomas Ch Hirschmann

    • Attocube Systems AG, Königinstraße 11a, 80539 Munich, Germany

  • Stephen K. Doorn

    • Los Alamos National Lab
    • Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

  • Yoong Ahm Kim

    • School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju, 61186, Republic of Korea

  • Newton M Barbosa Neto

    • Graduate Program in Physics, Federal University of Para, Belem, PA, Brazil
    • Federal University of Pará
    • Instituto de Ciências Exatas e Naturais – Programa de Pós-graduação em Física, Universidade Federal do Pará, Belém PA 66075-110, Brazil

  • Paulo T Araujo

    • Department of Physics and Astronomy, University of Alabama, Tuscaloosa, Alabama, United States
    • University of Alabama
    • Department of Physics and Astronomy, The University of Alabama, Tuscaloosa, Alabama 35487, USA