Probing structural stability of double-walled carbon nanotubes at high non-hydrostatic pressure by Raman spectroscopy

Shujie You, Mattias Mases, Ilya Dobryden, Alexander A. Green, Mark C. Hersam, Alexander V. Soldatov

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Theoretical calculations predict that the collapse pressure for double-walled carbon nanotubes (DWCNTs) is proportional to 1/R3, where R is the effective or average radius of a DWCNT. In order to address the problem of CNT stability at high pressure and stress, we performed a resonance Raman study of DWCNTs dispersed in sodium cholate using 532 and 633nm laser excitation. Raman spectra of the recovered samples show minor versus irreversible changes with increasing ID/IG ratio after exposure to high non-hydrostatic pressure of 23 and 35GPa, respectively. The system exhibits nearly 70% pressure hysteresis in radial breathing vibrational mode signals recovery on pressure release which is twice that predicted by theory.

Original languageEnglish
Pages (from-to)186-190
Number of pages5
JournalHigh Pressure Research
Volume31
Issue number1
DOIs
Publication statusPublished - Mar 1 2011

    Fingerprint

Keywords

  • double-walled carbon nanotubes
  • high pressure
  • resonance Raman spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this