Author/Authors :
Meletov، نويسنده , , K.P. and Maksimov، نويسنده , , A.A. and Tartakovskii، نويسنده , , I.I. and Bashkin، نويسنده , , I.O. and Shestakov، نويسنده , , V.V. and Krestinin، نويسنده , , A.V. and Shulga، نويسنده , , Yu.M. and Andrikopoulos، نويسنده , , K.S. and Arvanitidis، نويسنده , , J. and Christofilos، نويسنده , , D. and Kourouklis، نويسنده , , G.A.، نويسنده ,
Abstract :
Single-wall carbon nanotubes (SWNT) hydrogenated at P ≈ 5.0 GPa and T ≈ 500 °C (SWNT-H) were investigated by micro-Raman spectroscopy. The main feature of the Raman spectrum of the as-prepared SWNT-H is a giant structureless hot luminescence background that screens all vibrational modes. This disorder-induced background, attributed to random binding of the hydrogen atoms, vanishes after annealing of the SWNT-H in vacuum or in air. The changes in the Raman spectra of the partially annealed samples reflect the gradual decrease of structural disorder, related to removal of randomly bonded hydrogen. Complete outgassing restores the characteristic Raman spectrum of the pristine SWNT.
