Self-built tensile strain in large single-walled carbon nanotubes

Pingqi Gao, Lianxi Zheng, Qing Zhang, Shaoning Yuan, Yumeng You, Zexiang Shen, Deyan He

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Abnormal Raman scattering from a large-diameter ultralong single-walled carbon nanotube (SWCNT) is studied in detail. Along the SWCNT, the Raman spectra show the frequencies of 1553, 1563, and 2597 cm-1 for G+, G-, and Ǵ peaks, respectively, much lower than the corresponding frequencies well-reported both experimentally and theoretically. The significant downshifts in the peaks frequencies can be attributed to self-built tensile strain, which is likely caused by carbon nanodots decorated on the tube. After infrared laser heating is performed to one point of it, all of the Raman modes are found to shift to higher frequencies and approach their conventional values. We suggest that the SWCNTs with larger diameters easily possess such self-built strain compared to small-diameter SWCNTs because of the weaker curvature effect for the larger ones.

Original languageBritish English
Pages (from-to)992-998
Number of pages7
JournalACS Nano
Issue number2
StatePublished - 23 Feb 2010


  • Carbon nanotube
  • Deformation
  • Microscop
  • Raman
  • Strain


Dive into the research topics of 'Self-built tensile strain in large single-walled carbon nanotubes'. Together they form a unique fingerprint.

Cite this