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Fig. 7 | SpringerPlus

Fig. 7

From: Simultaneous synthesis of nanodiamonds and graphene via plasma enhanced chemical vapor deposition (MW PE-CVD) on copper

Fig. 7

Raman spectra of the nanodiamond spheres of the samples under different plasma conditions. Representative Raman spectra of the graphene-covered areas of the samples coated at 1 kW, 50 mbar and a methane concentration of 27 % (black spectrum, leading to a C2/Hα-ratio of 0.3), 14 % (blue spectrum, C2/Hα-ratio of 0.145) and 1 % (red spectrum, C2/Hα-ratio of 0.045)

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