Molybdenum Disulfide:
Scientists recently developed an electronic system using molybdenum disulphide only a few atoms thick; high-energy particles pass through it without causing damage.
- Molybdenum disulfide (MoS2) is an inorganic compound made up of sulfur and molybdenum.
- It exists in nature in the mineral molybdenite.
- In its bulk form, it appears as a dark, shiny solid.
- It belongs to a class of materials called ‘transition metal dichalcogenides’ (TMDCs).
- Materials in this class have the chemical formula MX₂, where M is a transition metal atom (groups 4-12 in the periodic table) and X is a chalcogen (group 16).
- Its crystals have a hexagonal layered structure that is similar to graphite.
- MoS2 has a high melting point.
- Because of its layered structure, hexagonal MoS2, like graphite, is an excellent solid lubricant.
- It can be used as surface coatings on machine parts (e.g., in the aerospace industry), in two-stroke engines (the type used for motorcycles), and in gun barrels (to reduce friction between the bullet and the barrel).
- Its stability makes it useful in high-temperature applications in which oils and greases are not practical.
- MoS2 is highly resistant to oxidation and corrosion, making it an effective lubricant for high-humidity and saltwater environments.
- In addition to its lubricating properties, MoS2 is a semiconductor.
