Can i estimate the number of graphene layer from this graph using the shape of the 2D band of this Raman spectrum?

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Sarada K Gopinathan

Yes, smoothen your spectra first there is a lot of noise in the spectra. After elimination, you can easily find the peaks corresponding to the graphene from existing literature.

Jürgen Weippert

If I look at this, it looks like it has only 5-6 data points per peak. I would be fine with a coarse peak intensity ratio from this, but I wouldn't use this for shape analysis.

Here you see the degree of detail required for a shape analysis:

https://tools.thermofisher.com/content/sfs/brochures/AN52252_E+1111+LayerThkns_H_1.pdf