Layered Molybdenum and Tungsten Dichalcogenides nanotechnologies open wide prospects for multifunctional nanomaterials design: solid, radiation-resistant nanolubricants, antifriction composite nanomaterials for space and ground based operation conditions (hydrogen atmosphere and medical facilities including); nanolubricant additives to industrial machine oils and greases for their tribotechnical parameters improvement; nanomaterials for energy converters; nanocatalysts, photocatalysis; nanomaterials as super shock absorbers at very high pressures.

Developed laboratory nanotechnologies enable to synthesize the nanocrystalline 2H-MCh₂ (M=Mo, W; Ch=S, Se) homogeneous powders (2Н-МоS₂ structure type characteristic for micron powders). The average sizes of anisotropic nanoparticles are adjusted in wide ranges effectively: 2H-МоS₂ – d_[013]=2.7(2)–4.7(2) nm, d_[110]=8.5(4)–53(3) nm; 2Н-WS₂ – d_[013]=2.7(2)–8.0(5) nm, d_[110]=7.9(4)–123(8) nm; 2H-МоSе₂ – d_[013]=5.2(3)–44(3) nm, d_[110]=25.4(1.6)–50(3) nm; 2Н-WSе₂ – d_[013]=4.5(3)–33(2) nm, d_[110]=18.7(1.2)–82(5) nm (for [013] and [110] crystallographic directions accordingly). Annealing temperatures have a dominating influence on anisotropic nanoparticles growth. Real layered 2Н-WS₂ and 2H-МоS₂ nanostructures are characterized by different levels of atomic disordering. Realization of disordering processes was carried out by powerful ultrasonic action in different liquid mediums. Thus 2Н-WS₂ nanostructures are characterized by higher stability in disordering processes in comparison with 2H-МоS₂ nanostructures.

Extremely small sizes of anisotropic nanoparticles (~1 nm for [013] direction), possible topochemical intercalation reactions (by hydrogen, different metals, organic compounds), disordering processes of real layered nanostructures can change essentially structural-sensitive physical properties of layered 2H-MCh₂ (M=Mo, W; Ch=S, Se) nanosized powders that can be used effectively for above multipurpose nanomaterials design.

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