Fig. 6
Single Raman spectrum for the sample grown at temperatures of a 900 °C and b 950 °C. Raman mapping images of sample grown on Cu substrate at temperature of 950 °C for c I2D/IG, d ID/IG, and e FWHM value of 2D band. Also, the histograms to indicate the distribution percentage of the intensity ratio, f I2D/IG, g ID/IG, and h FWHM value of 2D band. A distance between nozzle and substrate is 1 cm