We report on C-13 nuclear magnetic resonance from 10 up to 350 K on single wall carbon nanotubes. The magic angle spinning NMR spectrum shows one isotropic line at 126 ppm and the static spectrum a powder pattern typical for a curved graphene sheet. The T dependence of the spin-lattice relaxation rate T-1(-1) reveals an unusual phenomenon which could be explained by thermally activated small amplitude motion (SAM) of the nanotubes. If above 170 K, diffusion of twistons might be responsible for the local SAM of the C-13 sites, below this transition temperature frozen in twistons could appear with an orientational order of the nanotubes in the ropes.
- C-13 NMR evidence for dynamics of nanotubes in ropes
- Christophe Goze-Bac - Groupe de Dynamique des Phases CondenséesS Latil - Centre National de la Recherche ScientifiqueL Vaccarini - Université de MontpellierP Bernier - Université de MontpellierP Gaveau - Centre National de la Recherche ScientifiqueSaïd Tahir - Centre National de la Recherche ScientifiqueV Micholet - Université de MontpellierRaymond Aznar - Université de MontpellierA Rubio - Universidad de ValladolidK Metenier - Université d'OrléansF Beguin - Centre National de la Recherche Scientifique
- Physical Review B: Condensed Matter and Materials Physics (1998-2015), Vol.63(10)
- 99150535809311
- PAC - Plateforme d'Analyses et de Caractérisations Chimie Balard
- English
- Journal article
- hal-00658005