Résumé
Physical Review B 71 (2005) 195417 Aqueous suspensions of bundles and individual single-wall carbon nanotubes
were prepared with the help of surfactants. We study the changes in the Raman
spectra of the suspensions with respect to powders, and of exfoliated tubes
with respect to bundles. The radial breathing modes (RBM) upshift in
suspensions because of the internal pressure of the liquid. By contrast, no
shift is observed in the RBM spectra after exfoliation in the suspensions.
However, we demonstrate a selectivity of the exfoliation process for tubes of
small diameters.