Fig. 2. (a) SEM image of the ultrathin WS2 nanosheets. (b) Distribution of particle sizes of ultrathin nanosheets. (c) Low-resolution TEM image of ultrathin WS2 nanosheets. (d) HAADF-STEM image of an ultrathin WS2 nanosheet. (e) HR-TEM image of a WS2 nanosheet showing lattice fringes of 0.27 nm corresponding to (100) plane of WS2. (f) SAED pattern of WS2 nanosheets indexed to the (001) zone axis of the 1H phase. (g) EDS elemental maps of W and S. (h) EDS spectrum indicating the elemental composition of WS2 (Cu peak originates from the TEM sample grid).
