Fig. 2: Morphology and UV–visible spectrum.
From: Mid-IR probing unveils vanadium doping-induced unsaturation of defect states in monolayer MoS2

a Optical image of a large area of V-MoS2 on a Si/SiO2 substrate. b UV–visible absorption spectra of V-MoS2 (red) and pristine MoS2 (black curve), showing spectral broadening in the V-MoS2 sample.