Hello!

I am dealing with synthesis of graphene by CVD method under methan flow. I did Raman spectroscopy of the samples (laser 532nm,x10) and obtained spectra attached to this question.

I can distinguish the main peaks D,G,2D, D',D'+D.

But also I have one more (2434,9 cm-1), which is significantly bigger than others.

Does anybody know what is it?

Also I would be grateful if you can add few words about the overall picture (quality and number of layer, disorder), and all what you are able to see.

Thanks in advance

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