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Within the framework of the density functional theory (DFT), a theoretical study of the structural features of nanocrystals doped by an atom of foreign elements was carried out. Nanotubes of boron nitride (BN (3.3)) and carbon nanotubes (CNT (3.3)) were chosen as the objects of a current comparative study. Based on quantum chemical calculations using the WIEN2k code, the band gap theory and density of states for BN (3.3) and CNT (3.3) are determined according to the theory of DFT. Further, with the substitution of one Zr atom in the BN (3.3) and CNT (3.3) lattice, the band structure of the BN (3.3) + Zr and CNT (3.3) + Zr systems as well as the changes occurring in them are investigated.

The Quantum-Chemistry Calculations of Electronic Structure of Boron Nitride Nanocrystals with Density Functional Theory Realization