Similarities of the RBM and D Raman bands in double wall carbon nanotubes

Pascal Puech (1) , Ayman Bassil (1) , J. Gonzalez , Ch. Power , Emmanuel Flahaut (2) , Sophie Barrau (2) , Philippe Demont (2) , Colette Lacabanne (2) , Emile Perez (3) , Wolfgang Bacsa (1)

1 Laboratoire Physique des Solides de Toulouse
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
3 IMRCP - Interactions moléculaires et réactivité chimique et photochimique

We have examined several sets of heterogeneous double wall carbon nanotubes and analysed the frequency in a wide range of values. We have found that a statistical correlation exists between the D band intensity and the RBMs intensity. All the sample sets show a correlation of the RBM and D Raman intensity which is monotonic and non-linear using the 514nm laser excitation. Our results suggest that a similar mechanism is at the origin of the RBM and D bands. These results are corroborated by observations on carbon nanotubes embedded in a polymer matrix. We derive the phonon potential deformation for the D band and extend the excitation wavelength dependence of the D band to the UV. The intensity of the D band decreases with increasing hydrostatic pressure and fanishes at a pressure comparable to what has been observed earlier for the RBM and D* band.

Mots clés: Vibrational modes; Lead iodides; Raman spectra; Fillers; Carbon nanotubes; Vibrational modes; Vibrational modes; Vibrational modes

Domaines: Matériaux; Polymères

Pascal Puech, Ayman Bassil, J. Gonzalez, Ch. Power, Emmanuel Flahaut, et al.. Similarities of the RBM and D Raman bands in double wall carbon nanotubes. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2005, Physical Review B, 7 (15), pp.0. ⟨10.1103/PhysRevB.72.155436⟩. ⟨hal-02484341⟩