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Fig. 6 | SpringerPlus

Fig. 6

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

Fig. 6

Raman spectra of graphene samples coated 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). Typical properties of spectra of damaged graphene are observed. Interestingly, the quality of the three graphene films is very similar in spite of the different plasma chemistry

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