Efficient and Facile Synthetic Route of MoO 3 :MoS 2 Hybrid Thin Layer via Oxidative Reaction of MoS 2 Nanoflakes.

In the present study, MoO 3 :MoS 2 hybrid thin layers have been synthesized through partial oxidation of MoS 2 . We have demonstrated that the reaction requires darkness conditions to decrease the oxidation rate, thus obtaining the hybrid, MoO 3 :MoS 2 . A simple liquid-phase exfoliation (LPE) is carried out to achieve homogenous MoS 2 nanoflakes and high reproducibility of the results after MoS 2 oxidation. XPS analyses reveal the presence of MoO 3 , MoS 2 , and MoOxSy in the hybrid layer. These results are also confirmed by X-ray diffraction and high-resolution TEM. Optical absorbance reveals that the absorption peaks of the MoO 3 :MoS 2 hybrid are slightly redshifted with the appearance of absorption peaks in the near-infrared region due to the defects created after the oxidation reaction. The composition and atomic percentages of each component in the hybrid layer as a function of reaction time have also been reported to give perspective guides for improving electronic and optoelectronic devices based on 2D-MoS 2 .