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Arenal, R., Ferrari, A. C., Reich, S., Wirtz, L., Mevellec, J. .-Y., Lefrant, S., Rubio, A. & Loiseau, A. (2006) Raman spectroscopy of single-wall boron nitride nanotubes. Nano Lett. 6 1812–1816.
Added by: Florent Boucher (2016-05-12 13:21:36) |
| Type de référence: Article DOI: 10.1021/nl0602544 Numéro d'identification (ISBN etc.): 1530-6984 Clé BibTeX: Arenal2006 Voir tous les détails bibliographiques  |
Catégories: PMN Mots-clés: scattering Créateurs: Arenal, Ferrari, Lefrant, Loiseau, Mevellec, Reich, Rubio, Wirtz Collection: Nano Lett. |
Consultations : 1/604
Indice de consultation : 4% Indice de popularité : 1% |
| Résumé |
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Single-wall boron nitride nanotubes samples synthesized by laser vaporization of a hexagonal BN target under a nitrogen atmosphere are studied by UV and visible Raman spectroscopy. We show that resonant conditions are necessary for investigating phonon modes of BNNTs. Raman excitation in the UV (229 nm) provides preresonant conditions, allowing the identification of the A(1) tangential mode at 1370 cm(-1). This is 5 cm(-1) higher than the E-2g mode in bulk h-BN. Ab initio calculations show that the lower frequency of bulk h-BN with respect to large diameter nanotubes and the single sheet of h-BN is related to a softening of the sp2 bonds in the bulk due to interlayer interaction.
Added by: Florent Boucher |