Figure 2.

Raman spectroscopy in fluorinated and pristine graphene. (a) Raman spectra of mono-layer fluorinated graphene with different fluorine content and pristine mono-layer graphene. (b) Fitting of the 2D peak with a single Lorentzian function for pristine and fluorinated mono-layer graphene. (c, d) Raman spectra of fluorinated multi-layer graphene.