Figure 6
Optical images of typical NaCl-assisted WS2 prepared with a growth time of (a) 15 min or (b) 60 min. Neither the contrast nor the colour balance of these images was modified. (c) A typical AFM image of WS2. (d) A typical AFM image of WS2 after the specimen was immersed in deionized water for 10 min. (e) Grain size distribution of bilayer WS2. This distribution was constructed from the image shown in Fig. 4(c).
