Molybdenum Disulfide

 Molybdenum Disulfide Latest News

Scientists recently developed an electronic system using molybdenum disulphide only a few atoms thick; high-energy particles pass through it without causing damage.

About Molybdenum Disulfide

• 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.
• Like most mineral salts, MoS2 has a high melting point, but it begins to sublime at a relatively low 450 ºC. This property is useful for purifying the compound.
• 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).
  • Unlike graphite, MoS2 does not depend on adsorbed water or other vapors for its lubricant properties. 
  • It can be used at temperatures as high as 350 ºC in oxidizing environments and up to 1100 ºC in nonoxidizing environments. 
  • 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.

Source: TH

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