Figure 5
(a) An optical image of TLG.(b) A schematic diagram of the TLG. The inset image indicates the edge orientations and stacking orders. (c, f) and (d, g) are Raman images of the G mode and D mode integrated intensity, respectively. The cartoons illustrate the edge/crystal orientations determined by the Raman mapping. (e, h) Raman images of the G′ mode width. (i) Typical Raman spectra of ABA- and ABC-stacked TLG domains. The inset images show the Raman mapping of the G mode positions and widths for the TLG of two types of stacked domains. The inset spectra show the modes in the intermediate frequency range. The relative shifts of the combinational modes are the spectral natures of these two types of TLG29.
