Two-dimensional materials are substances consisting of a layer with a thickness of one atom. They have exceptional (unique) properties, not typical for conventional three – dimensional materials.
Two-dimensional materials are substances consisting of a layer with a thickness of one atom.
The feature of the two-dimensional material lies in the fact that all atoms are in the surface layer. All the atoms of this material have a lot of free or uncompensated (“dangling”) bonds. This circumstance causes, first, the appearance of two-dimensional materials exceptional (fantastic) properties are not typical of conventional three – dimensional materials. Second, by modifying the surface of a two-dimensional material may change its properties and functions.
It should be noted that the exceptional properties of two-dimensional material disappear with the appearance of the second and subsequent layers. Indeed, in this case the material becomes three-dimensional.
Currently, the scientists obtained the following two-dimensional materials:
– the silicene,
– two-dimensional boron nitride,
– materials formed from chalcogenides (S, Se, Te) and transition metal (Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Pd, Pt) having the formula MeX2, where Me – metal, X – chalcogenide.
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