Nano Research

, Volume 5, Issue 12, pp 854–862

Strain-induced D band observed in carbon nanotubes

  • Chia-Chi Chang
  • Chun-Chung Chen
  • Wei-Hsuan Hung
  • I. -Kai Hsu
  • Marcos A. Pimenta
  • Stephen B. Cronin
Research Article

DOI: 10.1007/s12274-012-0269-3

Cite this article as:
Chang, CC., Chen, CC., Hung, WH. et al. Nano Res. (2012) 5: 854. doi:10.1007/s12274-012-0269-3

Abstract

We report the emergence of the D band Raman mode in single-walled carbon nanotubes under large axial strain. The D to G mode Raman intensity ratio (ID/IG) is observed to increase with strain quadratically by more than a factor of 100-fold. Up to 5% strain, all changes in the Raman spectra are reversible. The emergence of the D band, instead, arises from the reversible and elastic symmetry-lowering of the sp2 bonds structure. Beyond 5%, we observe irreversible changes in the Raman spectra due to slippage of the nanotube from the underlying substrate, however, the D band intensity resumes its original pre-strain intensity, indicating that no permanent defects are formed.

Keywords

SWCNTs Raman D band defects strain sp2 bond 

Supplementary material

12274_2012_269_MOESM1_ESM.pdf (212 kb)
Supplementary material, approximately 214 KB.

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Chia-Chi Chang
    • 1
  • Chun-Chung Chen
    • 2
  • Wei-Hsuan Hung
    • 4
  • I. -Kai Hsu
    • 3
  • Marcos A. Pimenta
    • 5
  • Stephen B. Cronin
    • 1
    • 2
  1. 1.Department of PhysicsUniversity of Southern CaliforniaLos AngelesUSA
  2. 2.Department of Electrical EngineeringUniversity of Southern CaliforniaLos AngelesUSA
  3. 3.Department of Materials ScienceUniversity of Southern CaliforniaLos AngelesUSA
  4. 4.Department of Materials Science and EngineeringFeng Chia UniversityTaichungTaiwan
  5. 5.Departamento de FísicaUniversidade Federal de Minas GeraisBelo HorizonteBrazil

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