Defect formation and annealing kinetics in ion irradiated carbon nanotube buckypapers uri icon

abstract

  • We studied the frequency shifts in G, D and D* Raman modes in freestanding multiwall carbon nanotube buckypapers. Upon ion irradiation by 140 keV He+ or 3 MeV H+ ions, the intensity ratio of D-G modes linearly increases with fluence before amorphization. The ratio is used to quantitatively measure the level of disorder in the buckypaper. The study shows that, upon post-irradiation annealing, defect removal requires little energy addition in lightly damaged buckypaper, which is evidenced by an activation energy of 0.36 eV. Once amorphized, defect removal becomes very difficult. The D-G intensity ratio has no reduction in heavily damage sample after annealing up to 850 C. 2009 Elsevier B.V. All rights reserved.

published proceedings

  • NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

author list (cited authors)

  • Aitkaliyeva, A., McCarthy, M. C., Martin, M., Fu, E. G., Wijesundera, D., Wang, X., ... Shao, L.

citation count

  • 13

complete list of authors

  • Aitkaliyeva, Assel||McCarthy, Michael C||Martin, Michael||Fu, EG||Wijesundera, D||Wang, Xuemei||Chu, Wei-Kan||Jeong, Hae-Kwon||Shao, Lin

publication date

  • October 2009