Figure 4
Raman spectra at the wrinkle measured with different excitation energies, normalised to the intensity of the 2D mode. The inset shows the intensity ratio between the G mode at the wrinkle [I(G)] and several μm away from a single layer graphene [I(GSLG)] as a function of the laser excitation energy EL. Red squares are the measured intensity ratios, and the black continuous line is a least square fit to Eq. 1.
