English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/97353
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 21 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título

Molecular dynamics and phase transition in one-dimensional crystal of C60 encapsulated inside single wall carbon nanotubes

Autor Abou-Hamad, E.; Rubio, Angel; Goze-Bac, Christophe
Palabras clave Carbon nanostructures
Dynamical properties
Phase transition
Nuclear magnetic resonance
Fecha de publicación 2009
EditorAmerican Chemical Society
Citación ACS Nano 3(12): 3878-3883 (2009)
ResumenOne-dimensional crystals of 25% 13C-enriched C60 encapsulated inside highly magnetically purified SWNTs were investigated by following the temperature dependence of the 13C NMR line shapes and the relaxation rates from 300 K down to 5 K. High-resolution MAS techniques reveal that 32% of the encapsulated molecules, so-called the C60α, are blocked at room temperature and 68%, labeled C60β, are shown to reversly undergo molecular reorientational dynamics. Contrary to previous NMR studies, spin−lattice relaxation time reveals a phase transition at 100 K associated with the changes in the nature of the C60β dynamics. Above the transition, the C60β exhibits continuous rotational diffusion; below the transition, C60β executes uniaxial hindered rotations most likely along the nanotubes axis and freeze out below 25 K. The associated activation energies of these two dynamical regimes are measured to be 6 times lower than in fcc-C60, suggesting a quiet smooth orientational dependence of the interaction between C60β molecules and the inner surface of the nanotubes.
Versión del editorhttp://dx.doi.org/10.1021/nn901128t
URI http://hdl.handle.net/10261/97353
DOI10.1021/nn901128t
ISSN1936-0851
E-ISSN1936-086X
Aparece en las colecciones: (CFM) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.