Fig. 28.

Metal atoms substitution doping of TMCs. a Schematic showing the thermal doping of Sn in WS₂. b ADF-STEM images showing the area of Sn-doped WS₂ monolayer. c Schematics showing the formation of Sn-doped WS₂ monolayers. Reproduced with permission [155].

Copyright 2019, American Chemical Society. d-f ADF-STEM image, image simulation and atomic model from density functional theory (DFT) geometry optimization of the Co on Mo atop site. g-i HAADF image, image simulation from DFT geometry optimization and atomic model from geometry optimized DFT of a Co-substituted S site. j-l HAADF image, image simulation and atomic model from DFT geometry optimization showing Co in the hollow site. Reproduced with permission [154]. Copyright 2017, Springer Nature