Résumé
The quantitative analysis of the vibrational properties of carbon nanotubes is a key issue for the interpretation of Raman experiments. In particular, a reliable characterization of the atomic structure of single-wall carbon nanotubes produced under various conditions is mainly based on the interpretation of low-frequency (100-300 cm-1) Raman spectra. In the present work, we analyze the influence of the packing of the tubes on these low-frequency modes. We find that the low-frequency spectra of crystals of single-wall carbon nanotubes present two intense Raman modes instead of a single fully symmetric A 1 g mode characteristic of isolated tubes. The second mode has a non-negligible intensity for crystals formed with nanotubes of radii larger than 7 Å. For finite number of tubes in a bundle, two breathinglike intense modes appear as a specific signature. Finally, our simulation for inhomogenous bundles made of a large number of tubes does not reveal any specific signature of the individual tubes in the low-frequency Raman spectra.
| langue originale | Anglais |
|---|---|
| Numéro d'article | 205403 |
| Pages (de - à) | 2054031-20540310 |
| Nombre de pages | 18486280 |
| journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 64 |
| Numéro de publication | 20 |
| Les DOIs | |
| état | Publié - 15 nov. 2001 |
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Influence of packing on the vibrational properties of infinite and finite bundles of carbon nanotubes. / Henrard, Luc; Popov, Valentin N.; Rubio, Angel.
Dans: Physical Review B - Condensed Matter and Materials Physics, Vol 64, Numéro 20, 205403, 15.11.2001, p. 2054031-20540310.Résultats de recherche: Contribution à un journal/une revue › Article
TY - JOUR
T1 - Influence of packing on the vibrational properties of infinite and finite bundles of carbon nanotubes
AU - Henrard, Luc
AU - Popov, Valentin N.
AU - Rubio, Angel
PY - 2001/11/15
Y1 - 2001/11/15
N2 - The quantitative analysis of the vibrational properties of carbon nanotubes is a key issue for the interpretation of Raman experiments. In particular, a reliable characterization of the atomic structure of single-wall carbon nanotubes produced under various conditions is mainly based on the interpretation of low-frequency (100-300 cm-1) Raman spectra. In the present work, we analyze the influence of the packing of the tubes on these low-frequency modes. We find that the low-frequency spectra of crystals of single-wall carbon nanotubes present two intense Raman modes instead of a single fully symmetric A 1 g mode characteristic of isolated tubes. The second mode has a non-negligible intensity for crystals formed with nanotubes of radii larger than 7 Å. For finite number of tubes in a bundle, two breathinglike intense modes appear as a specific signature. Finally, our simulation for inhomogenous bundles made of a large number of tubes does not reveal any specific signature of the individual tubes in the low-frequency Raman spectra.
AB - The quantitative analysis of the vibrational properties of carbon nanotubes is a key issue for the interpretation of Raman experiments. In particular, a reliable characterization of the atomic structure of single-wall carbon nanotubes produced under various conditions is mainly based on the interpretation of low-frequency (100-300 cm-1) Raman spectra. In the present work, we analyze the influence of the packing of the tubes on these low-frequency modes. We find that the low-frequency spectra of crystals of single-wall carbon nanotubes present two intense Raman modes instead of a single fully symmetric A 1 g mode characteristic of isolated tubes. The second mode has a non-negligible intensity for crystals formed with nanotubes of radii larger than 7 Å. For finite number of tubes in a bundle, two breathinglike intense modes appear as a specific signature. Finally, our simulation for inhomogenous bundles made of a large number of tubes does not reveal any specific signature of the individual tubes in the low-frequency Raman spectra.
UR - http://www.scopus.com/inward/record.url?scp=0035890649&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.64.205403
DO - 10.1103/PhysRevB.64.205403
M3 - Article
AN - SCOPUS:0035890649
VL - 64
SP - 2054031
EP - 20540310
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 2469-9950
IS - 20
M1 - 205403
ER -