Résumé
This work is dedicated to the structural and vibrationnal properties of carbon nanotube based molecular compounds: double-walled carbon nanotubes, peapods and ternary compounds. In the first part of the manuscript, the structure of these compounds is studied by X-ray and neutron powder diffraction. The diffraction patterns are numerically calculated, and comparisons between numerical and experimental results allow to determine the structure of these compounds. In the second part of this work, the dynamical properties of peapods and double-walled carbon nanotubes are studied by inelastic neutron scattering. The experimental phonon densities of states of peapods and double-walled carbon nanotubes are compared with the results of lattice dynamics calculations, performed for different structural hypothesis (in the case of peapods, C60 stacked as monomer chains, as dimer chains or as polymeric chains).