Raman spectra of double-wall carbon nanotubes under extreme uniaxial stress.
We investigated the pressure dependence of the Raman frequencies and intensities of the D and G bands of double-wall carbon nanotubes under strong uniaxial conditions. Using moissanite anvils, we observed for the first time the evolution of the D band under extreme stress/pressure conditions. We find that the difference between D and G frequencies remains constant over the whole stress range. In addition, we observe that double-wall carbon nanotubes behave elastically up to the maximum uniaxial stress reached in our experiments, which is estimated to be about 12 GPa.
del Corro
Elena
E
MALTA CONSOLIDER Team, Departamento de Quimica Fisica I, Facultad de Ciencias Quimicas, Universidad Complutense de Madrid, 28040-Madrid, Spain.
González
Jesús
J
Taravillo
Mercedes
M
Flahaut
Emmanuel
E
Baonza
Valentín G
VG