Tunable Raman spectroscopy study of CVD and peapod-derived bundled and individual double-wall carbon nanotubes

F. Villalpando-Paez, L. G. Moura, C. Fantini, H. Muramatsu, T. Hayashi, Y. A. Kim, M. Endo, M. Terrones, M. A. Pimenta, M. S. Dresselhaus

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18 Scopus citations

Abstract

We use 40 laser excitation energies to analyze the differences in the Raman spectra from chemical vapor deposition-derived double-wall carbon nanotube (CVD-DWNT) bundles, fullerene-derived DWNT bundles (C60 -DWNTs), and individual fullerene-derived DWNTs with inner type-I and type-II semiconducting tubes paired with outer metallic tubes. For the radial breathing mode (RBM) of SWNTs, an experimental ωRBM vs dt relationship of the form ωRBM =A/ dt +B is obtained for the inner tubes of DWNT bundles where the A and B constants are found to be close to those obtained by elasticity theory when modeling the elastic properties of graphite. A similar change in ωRBM is observed for an inner type-II semiconducting (6,5) tube and a type-I (9,1) tube when inside various metallic outer tubes. The G-band frequency is observed to upshift when switching the laser resonance from DWNTs with semiconducting inner tubes to DWNTs with metallic inner tubes. Finally, we measure the G⊃′ feature from C 60 -DWNTs and note a downshift in frequency with respect to that of CVD-DWNTs.

Original languageEnglish (US)
Article number155416
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number15
DOIs
StatePublished - Oct 8 2010

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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