2HMoS2
2H-MoS2 is a polymorph of molybdenum disulfide (MoS2) in which the structure consists of stacked, sulfur-atom–chlorinated layers with molybdenum in a trigonal prismatic coordination. The “2H” designation refers to a hexagonal polytype with two layers per repeating unit along the c-axis and AB-like stacking. In its bulk form, 2H-MoS2 is the most common phase of the natural mineral molybdenite. It is semiconducting, in contrast to the metallic 1T phase of MoS2.
Structure and crystal chemistry: Each Mo atom is sandwiched between two sheets of sulfur atoms, forming S–Mo–S
Electronic properties: Bulk 2H-MoS2 has an indirect bandgap around 1.2 eV, while a monolayer transitions to
Synthesis and processing: 2H-MoS2 can be obtained from bulk crystals via mechanical or liquid exfoliation to
Applications: 2H-MoS2 is used in field-effect transistors, photodetectors, and flexible electronics, where its sizable on/off ratio