Fig. 1. SEM photos of different materials and their local enlargements. (a) MoS₂; (b) WS₂

Fig. 2. SEM images of Mo_1-XW_XS₂ at different concentrations. (a) 0.05; (b) 0.10; (c) 0.20; (d) 0.40; (e) 0.50; (f) 0.60; (g) 0.80

Fig. 3. XRD patterns of different materials. (a) XRD pattern of MoS₂; (b) XRD pattern of WS₂; (c)(d) XRD patterns of Mo_1-XW_XS₂ at different concentrations

Fig. 4. Lattice constants of Mo—S bond and W—S bond at different concentrations. (a) Mo—S bond; (b) W—S bond

Fig. 5. Raman scattering diagrams of different materials. (a) Raman scattering diagram of MoS₂; (b) Raman scattering diagram of WS₂; (c) Raman scattering diagram of Mo_1-XW_XS₂ at different concentrations