Exfoliation of single-wall carbon nanotubes in aqueous surfactant suspensions: A Raman study Auteur(s): Izard N., Riehl Didier, Anglaret E. (Article) Publié: Physical Review B, vol. 71 p.195417 (2005) Texte intégral en Openaccess : Ref HAL: hal-00005824_v1 Ref Arxiv: cond-mat/0507099 DOI: 10.1103/PhysRevB.71.195417 WoS: 000230244100112 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 46 Citations Résumé: 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. Commentaires: Soumis le 3 Décembre 2003 |