Fig. 4: Defect-engineering of CVD-grown MoS₂.

a A visual representation of Ar plasma treatment. b XPS of Mo 3d core level of pristine MoS₂ (c) XPS of Mo 3d core level of optimal-power plasma-treated MoS₂. d XPS of S 2p core level of pristine MoS₂ (e) XPS of S 2p core level of optimal-power plasma-treated MoS₂.