Fig. 1: Structural characterization of different MoS2.

a Schematic illustration of the synthesis of ER-MoS2. b, c Transmission electron microscopy (TEM) images of ER-MoS2. d–k High-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) images (d, h side view and top view, respectively), EDX line scans (e, i), and EDX mappings (f, g, j, k) of ER-MoS2. l, TEM image of PD-MoS2. m The coordination number of the Mo-Mo shell for ER-MoS2 and PD-MoS2.