Fig. 4. (a) SE micrograph of large polycrystalline MoS₂, representative of Z3, (b) BSE micrograph, (c) Raman map of the separation between the A_1g and E_2g modes, defined as Δ, (d) Raman map of the A_1g and E_2g mode intensity ratio, (e) PL intensity map of the MoS₂ A exciton, and (f) PL peak position map of the MoS₂ A exciton.