Author/Authors :
Corio، نويسنده , , P and Temperini، نويسنده , , M.L.A and Santos، نويسنده , , P.S and Romero، نويسنده , , J.V and Huber، نويسنده , , J.G and Luengo، نويسنده , , C.A and Brown، نويسنده , , S.D.M and Dresselhaus، نويسنده , , M.S and Dresselhaus، نويسنده , , G and Dantas، نويسنده , , M.S.S and Leite، نويسنده , , C.F and Matinaga، نويسنده , , F and Gonzalez، نويسنده , , J.C and Pimenta، نويسنده , , M.A، نويسنده ,
Abstract :
Single-walled carbon nanotube samples produced in the presence of different combinations of metal catalysts have been studied by resonant Raman spectroscopy. The diameter distribution of different samples has been determined by analysis of the laser excitation energy dependence of the tangential modes associated with metallic nanotubes. These modes are resonantly enhanced over a narrow range of the exciting energies, which shifts for different samples. The Raman cross-section expression has been used to fit the experimental Raman excitation profiles. This procedure was used to determine the mean value and the width of the distribution of diameters within each sample.
