Fig. 5From: Synthesis of Large-Area Single-Layer Graphene Using Refined Cooking Palm Oil on Copper Substrate by Spray Injector-Assisted CVDRaman mapping images of graphene on Cu substrate for a–c I2D/IG, d–f ID/IG, and g–i FWHM value of 2D band, for 1 cm, 3 cm, and 6 cm. Also, the histograms to indicate the distribution percentage of the intensity ratio, j I2D/IG, k ID/IG, and l FWHM value of 2D band. Growth temperature 1000 °CBack to article page