Raman characterization of singlewalled carbon nanotubes and PMMA-nanotubescomposites

The Raman spectroscopy have allowed us to perform studies on singlewalled n anotubes (SWNT's) produced by following methods : electric are, laser ablat ion and solar energy. As this characterization method provides a great deal of informations, we will present a comparison between the nanotubes produc ed by all these processes and the influence of some synthesis parameters. By using spin casting, we have produced thin films of PMMA-SWNT's for diffe rent concentrations. Then, we have characterized these new materials by Ram an spectroscopy. The aim of these investigations is to get information on t he possible interactions between these two materials. In particular, we hav e studied the evolution of the composites films spectra as a function of th e nanotubes concentration in the polymer.