Figure 2
Raman spectra of coal tar pitch-derived graphene grown under Ni layer after annealing.
(a) Raman spectra of graphene depending on the annealing temperature for 4 min. (b) Raman spectra of graphene depending on the annealing time at 1100 °C. (c) Raman spectra of graphene depending on Ni layer thickness at 1100 °C for 4 min. (d) Raman spectra of graphene depending on the softening point of coal tar pitch at 1100 °C for 4 min. (e) Raman spectra of graphene depending on the concentration of CTP solution at 1100 °C for 4 min. (f) Raman spectra of graphene grown with and without H2 gas. Lines have been shifted vertically for clarity.
