MoS(2) Surface Structure Tailoring via Carbonaceous Promoter

Atomically thin semiconducting transition-metal dichalcogenides have been attracting lots of attentions, particularly, molybdenum disulfide (MoS(2)) monolayers show promising applications in field effect transistors, optoelectronics and valleytronics. However, the controlled synthesis of highly crystalline MoS(2) remain a challenge especially the systematic approach to manipulate its structure and morphology. Herein, we report a method for controlled synthesis of highly crystalline MoS(2) by using chemical vapor deposition method with carbonaceous materials as growth promoter. A uniform and highly crystalline MoS(2) monolayer with the grain size close to 40 μm was achieved. Furthermore, we extend the method to the manipulation of MoS(2) morphology, flower-shape vertical grown MoS(2) layers were obtained on growth promoting substrates. This simple approach allows an easy access of highly crystalline MoS(2) layers with morphology tuned in a controllable manner. Moreover, the flower-shape MoS(2) grown on graphene oxide film used as an anode material for lithium-ion batteries showed excellent electrochemical performance.