Fig. 1: MoS2 synthesized by two-step method.
From: Active-matrix monolithic gas sensor array based on MoS2 thin-film transistors

a Schematic image of two-step growth of bilayer MoS2. b Optical image of MoS2 film and Si/SiO2 substrate, and thickness profile of MoS2 film. c Raman and d XPS spectra of MoS2 films.