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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. © 2014 © 2014 Taylor & Francis.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: High Pressure Research, february 2014

Editorial: Taylor & Francis

 Fecha de publicación: 01/04/2014

Nº de páginas: 7

Tipo de publicación: Artículo de Revista

 DOI: 10.1080/08957959.2013.878714

ISSN: 0895-7959,1026-7522

Url de la publicación: http://www.tandfonline.com/doi/abs/10.1080/08957959.2013.878714

Autores/as

GHANDOUR, AHMAD J.

RICE, CORY T.

CROWE, IAIN F.

HALSALL, MATTHEW P.

SAPELKIN, ANDREI V.

DUNSTAN, DAVID J.