(e) Cs-corrected HRTEM images. (f) HAADF-STEM image. (g) EDS elemental maps showing spatial distributions of the elements. (h) HRTEM images of the corresponding regions marked in (f).

Optical microscopy was used to observe the morphology of the nanosheets, and scanning electron microscopy (SEM) provided surface details. High-resolution transmission electron microscopy (HRTEM ...