Figure 2
From: Synthesis of flake-like graphene from nickel-coated polyacrylonitrile polymer
Raman spectra of the samples at different thickness of the Ni coating. The coated Ni thickness was 0 nm (a), 20 nm (b), 50 nm (c), and 150 nm (d). The Ni-coated PAN/SiO2/Si films were heated at different temperatures of 950°C, 1,000°C, and 1,050°C and holding time of 5, 10, and 15 min. Lorentzian fittings of the 2D peaks for the Ni(150 nm)/PAN/SiO2/Si films pyrolyzed at 950°C/5 min (e), 950°C/10 min (f), and 950°C/15 min (g) were shown. The black-colored lines are the original data, and the blue-colored lines denote the fitted data.