MoS2based

MoS2based describes materials that incorporate molybdenum disulfide (MoS2) as a major component. MoS2based systems are often layered transition metal dichalcogenides (TMDs) and their composites, with applications across electronics, catalysis, energy storage, and lubrication.

Structure and properties: MoS2 is a layered material composed of S-Mo-S sheets held by van der Waals forces. It exists in 2H semiconducting and 1T metallic polymorphs; monolayer MoS2 shows a direct bandgap near 1.8 eV, while bulk MoS2 has an indirect gap around 1.2 eV. Exfoliation yields nanosheets and monolayers used in devices.

Synthesis and modification: MoS2based materials are prepared by chemical vapor deposition, mechanical or liquid phase exfoliation, intercalation chemistry, or chemical doping. Heterostructures with graphene or other 2D semiconductors are common to tailor electronic, optical, and catalytic properties.

Applications: In electronics and optoelectronics, MoS2based transistors and photodetectors exploit the layer dependent band structure. In catalysis, edge sites catalyze the hydrogen evolution reaction. In energy storage, MoS2based electrodes support Li ion and sodium ion batteries and supercapacitors. In lubrication, MoS2based layers reduce friction.

Challenges and outlook: Phase control between 2H and 1T, stability of metastable phases, scalable synthesis, and integration with conventional devices remain active research areas. MoS2based materials benefit from composite design with carbon materials and metals to enhance conductivity and performance.