TY - JOUR
T1 - Probing structural stability of double-walled carbon nanotubes at high non-hydrostatic pressure by Raman spectroscopy
AU - You, Shujie
AU - Mases, Mattias
AU - Dobryden, Ilya
AU - Green, Alexander A.
AU - Hersam, Mark C.
AU - Soldatov, Alexander V.
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/3
Y1 - 2011/3
N2 - 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.
AB - 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.
KW - double-walled carbon nanotubes
KW - high pressure
KW - resonance Raman spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=79952935321&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79952935321&partnerID=8YFLogxK
U2 - 10.1080/08957959.2011.562897
DO - 10.1080/08957959.2011.562897
M3 - Article
AN - SCOPUS:79952935321
VL - 31
SP - 186
EP - 190
JO - High Pressure Research
JF - High Pressure Research
SN - 0895-7959
IS - 1
ER -