Buscar

Estamos realizando la búsqueda. Por favor, espere...

Pressure coefficients of Raman modes of carbon nanotubes resolved by chirality: Environmental effect on graphene sheet

Abstract: Studies of the mechanical properties of single-walled carbon nanotubes are hindered by their availability only as ensembles of tubes with a range of diameters. However, tunable Raman spectroscopy is capable of identifying individual tubes from such ensembles. Interestingly, both the radial breathing mode and, surprisingly, the G-mode pressure coefficients exhibit strong environmental effects, which are largely independent of the nature of the environment. We show that the G-mode pressure coefficient varies with diameter, consistent with the thick-wall tube model. Reappraisal of literature data for graphene and graphite suggests revision of both the G-mode Grüneisen parameter ? and the shear deformation parameter ? toward the value of 1.34.

 Autoría: Ghandour A., Crowe I., Proctor J., Sun Y., Halsall M., Hernandez I., Sapelkin A., Dunstan D.,

 Fuente: Physical Review B - Condensed Matter and Materials Physics, 2013, 87(8), 085416

 Editorial: American Physical Society

 Fecha de publicación: 13/02/2013

 Nº de páginas: 4

 Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevB.87.085416

 ISSN: 1098-0121,1550-235X,2469-9950,2469-9969

 Url de la publicación: https://doi.org/10.1103/PhysRevB.87.085416

Autoría

GHANDOUR, AHMAD J.

CROWE, IAIN F.

PROCTOR, JOHN EDWARD

SUN, YIWEI

HALSALL, MATTHEW P.

SAPELKIN, ANDREI

DUNSTAN, DAVID J.