Resonance Raman spectroscopy of carbon nanotubes: Pressure effects on G-mode

Y. W. Sun; I. Hernández; A. J. Ghandour; C. Rice; I. F. Crowe; M. P. Halsall; A. Sapelkin; J. Gonzalez; F. Rodriguez; D. J. Dunstan

doi:10.1080/08957959.2013.878714

Resonance Raman spectroscopy of carbon nanotubes: Pressure effects on G-mode

Y. W. Sun, I. Hernández, A. J. Ghandour, C. Rice, I. F. Crowe, M. P. Halsall, A. Sapelkin, J. Gonzalez, F. Rodriguez, D. J. Dunstan

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

Abstract

We use 488 and 568 nm laser Raman spectroscopy under high pressure to selectively follow evolution of Raman G-mode signals of single-walled carbon nanotubes (SWCNTs) of selected diameters and chiralities ((6, 5) and (6, 4)). The G-mode pressure coefficients of tubes from our previous work are consistent with the thick-wall tube model. Here we report the observation of well-resolved G-minus peaks in the Raman spectrum of SWCNTs in a diamond-anvil cell. The pressure coefficients of these identified tubes in water, however, are unexpected, having the high value of over 9 cm-1 GPa-1 for the G-plus and the G-minus, and surprisingly the shift rates of the same tubes in hexane have clearly lower values. We also report an abrupt increase of G-minus peak width at about 4 GPa superposed on a continuous peak broadening with pressure. © 2014 © 2014 Taylor & Francis.

Original language	English
Pages (from-to)	191-197
Number of pages	6
Journal	High Pressure Research
Volume	34
Issue number	2
DOIs	https://doi.org/10.1080/08957959.2013.878714
Publication status	Published - 3 Apr 2014

Keywords

carbon nanotubes
G-plus and G-minus
high pressure
pressure media
Resonance Raman spectroscopy

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10.1080/08957959.2013.878714

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title = "Resonance Raman spectroscopy of carbon nanotubes: Pressure effects on G-mode",

abstract = "We use 488 and 568 nm laser Raman spectroscopy under high pressure to selectively follow evolution of Raman G-mode signals of single-walled carbon nanotubes (SWCNTs) of selected diameters and chiralities ((6, 5) and (6, 4)). The G-mode pressure coefficients of tubes from our previous work are consistent with the thick-wall tube model. Here we report the observation of well-resolved G-minus peaks in the Raman spectrum of SWCNTs in a diamond-anvil cell. The pressure coefficients of these identified tubes in water, however, are unexpected, having the high value of over 9 cm-1 GPa-1 for the G-plus and the G-minus, and surprisingly the shift rates of the same tubes in hexane have clearly lower values. We also report an abrupt increase of G-minus peak width at about 4 GPa superposed on a continuous peak broadening with pressure. {\textcopyright} 2014 {\textcopyright} 2014 Taylor & Francis.",

keywords = "carbon nanotubes, G-plus and G-minus, high pressure, pressure media, Resonance Raman spectroscopy",

author = "Sun, {Y. W.} and I. Hern{\'a}ndez and Ghandour, {A. J.} and C. Rice and Crowe, {I. F.} and Halsall, {M. P.} and A. Sapelkin and J. Gonzalez and F. Rodriguez and Dunstan, {D. J.}",

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AU - Sun, Y. W.

AU - Hernández, I.

AU - Ghandour, A. J.

AU - Rice, C.

AU - Crowe, I. F.

AU - Halsall, M. P.

AU - Sapelkin, A.

AU - Gonzalez, J.

AU - Rodriguez, F.

AU - Dunstan, D. J.

N1 - cited By (since 1996)0

PY - 2014/4/3

Y1 - 2014/4/3

N2 - We use 488 and 568 nm laser Raman spectroscopy under high pressure to selectively follow evolution of Raman G-mode signals of single-walled carbon nanotubes (SWCNTs) of selected diameters and chiralities ((6, 5) and (6, 4)). The G-mode pressure coefficients of tubes from our previous work are consistent with the thick-wall tube model. Here we report the observation of well-resolved G-minus peaks in the Raman spectrum of SWCNTs in a diamond-anvil cell. The pressure coefficients of these identified tubes in water, however, are unexpected, having the high value of over 9 cm-1 GPa-1 for the G-plus and the G-minus, and surprisingly the shift rates of the same tubes in hexane have clearly lower values. We also report an abrupt increase of G-minus peak width at about 4 GPa superposed on a continuous peak broadening with pressure. © 2014 © 2014 Taylor & Francis.

AB - We use 488 and 568 nm laser Raman spectroscopy under high pressure to selectively follow evolution of Raman G-mode signals of single-walled carbon nanotubes (SWCNTs) of selected diameters and chiralities ((6, 5) and (6, 4)). The G-mode pressure coefficients of tubes from our previous work are consistent with the thick-wall tube model. Here we report the observation of well-resolved G-minus peaks in the Raman spectrum of SWCNTs in a diamond-anvil cell. The pressure coefficients of these identified tubes in water, however, are unexpected, having the high value of over 9 cm-1 GPa-1 for the G-plus and the G-minus, and surprisingly the shift rates of the same tubes in hexane have clearly lower values. We also report an abrupt increase of G-minus peak width at about 4 GPa superposed on a continuous peak broadening with pressure. © 2014 © 2014 Taylor & Francis.

KW - carbon nanotubes

KW - G-plus and G-minus

KW - high pressure

KW - pressure media

KW - Resonance Raman spectroscopy

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DO - 10.1080/08957959.2013.878714

M3 - Article

SN - 0895-7959

VL - 34

SP - 191

EP - 197

JO - High Pressure Research

JF - High Pressure Research

IS - 2

ER -

Resonance Raman spectroscopy of carbon nanotubes: Pressure effects on G-mode

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Keywords

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