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

doi:10.1080/08957959.2011.562897

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

Northwestern University

Research output: Contribution to journal › Article › peer-review

14 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 I_D/I_G 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 language	English
Pages (from-to)	186-190
Number of pages	5
Journal	High Pressure Research
Volume	31
Issue number	1
DOIs	https://doi.org/10.1080/08957959.2011.562897
Publication status	Published - Mar 2011

Keywords

double-walled carbon nanotubes
high pressure
resonance Raman spectroscopy

ASJC Scopus subject areas

Condensed Matter Physics

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10.1080/08957959.2011.562897

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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.",

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AU - Hersam, Mark C.

AU - Soldatov, Alexander V.

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