Tungsten disulfide

Owing to this layered structure, WS2 forms non-carbon nanotubes, which were discovered after heating a thin sample of WS2 in 1992.

The oxidation of other semiconductor transition metal dichalcogenides (S-TMDs) such as MoS2, has similarly been observed to occur in ambient light and atmospheric conditions.

[13] In recent years it has also found applications as a saturable for passively mode locked fibre lasers resulting in femtosecond pulses being produced.

Lamellar tungsten disulphide is used as a dry lubricant for fasteners, bearings, and molds,[16] as well as having significant use in aerospace and military industries.

[17][failed verification] WS2 can be applied to a metal surface without binders or curing, via high-velocity air impingement.

[11] WS2 also catalyses hydrogenation of carbon dioxide:[11][19][20] Tungsten disulfide is the first material which was found to form non-carbon nanotubes, in 1992.

[21] The addition of WS2 nanotubes to epoxy resin improved adhesion, fracture toughness and strain energy release rate.

The enhanced stiffness and toughness of PMMA fiber meshes by means of non-carbon nanotubes addition may have potential uses as impact-absorbing materials, e.g. for ballistic vests.

[27] Taiwan Semiconductor Manufacturing Company (TSMC) is investigating use of WS2 as a channel material in field effect transistors.

Atomic image (top) and model (bottom) of Nb-doped WS 2 . Blue, red, and yellow spheres indicate W, Nb, and S atoms, respectively. Nb doping allows to reduce the WS 2 bandgap. [ 7 ]