Raman spectroscopy of iodine-doped double-walled carbon nanotubes

Julien Cambedouzou (1) , Jean-Louis Sauvajol (1) , Abdelali Rahmani (1, 2) , Emmanuel Flahaut (3) , Alain Peigney (3) , Christophe Laurent (3)

1 GDPC - Groupe de Dynamique des Phases Condensées
2 Département de Physique
3 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

We present a Raman spectroscopy study of iodine-intercalated (p-type-doped) double-walled carbon nanotubes. Double-walled carbon nanotubes (DWCNTs) are synthesized by catalytic chemical vapor deposition and characterized by Raman spectroscopy. The assignment of the radial breathing modes and the tangential modes of pristine DWCNTs is done in the framework of the bond polarization theory, using the spectral moment method. The changes in the Raman spectrum upon iodine doping are analyzed. Poly-iodine anions are identi- fied, and the Raman spectra reveal that the charge transfer between iodine and DWCNTs only involves the outer tubes.

Mots clés: Raman; nanotubes; bond polarization theory

Domaines: Autre [cond-mat.other]

Julien Cambedouzou, Jean-Louis Sauvajol, Abdelali Rahmani, Emmanuel Flahaut, Alain Peigney, et al.. Raman spectroscopy of iodine-doped double-walled carbon nanotubes. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2004, 69, pp.235422. ⟨10.1103/PhysRevB.69.235422⟩. ⟨hal-00003162⟩