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Article
Residual Strength of Glazing of Spacecraft upon Collisions with Cosmic Particles in Near-Earth Orbits
The reliability of the glass used in spacecraft windows depends on the size of the defects forming upon the im**ement of meteoritic particles on a window, as well as the size, density, velocity, and angles o...
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Article
Matrix Calculation of the Spectral Characteristics of AII–BVI Semiconductors Doped with Iron-Group Ions
A method for the matrix calculation of the spectral characteristics of AII–BVI semiconductors doped with iron-group ions is proposed, which takes into account all possible interactions in the ion and the effec...
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Article
Elastic modulus, surface tension, adhesion, and ideal and real strengths of solids
Formulas for the surface tension coefficient, adhesion energy, elastic modulus, and strength of solids versus the atomic density have been derived. The theoretical values of these parameters have been confirme...
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Article
Energies of π*- and π-states of the conduction band and valence band of chiral carbon nanotubes
Nanotubes (NTs) are mainly represented by (n,p) chiral NTs with chirality indices 0 < p < n delimited by (n,0) and (n,n) for achiral NTs. In (n,p) chiral NTs, the unit cell hexagons have a helical arrangement on ...
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Article
Magnetic susceptibility of carbon nanotubes
For (n0) and (nn) nanotubes in a magnetic field parallel to the nanotube axis, energy level formulas have been derived and energy level diagrams have been calculated. It has been shown that, for metallic nanotube...
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Article
Molecular orbital energies of coordination structures
The angular periodicity of atom positions in coordination structures determines the angular translational symmetry of functions of electronic states of molecular orbitals (MOs). Analytical formulas of the MO e...
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Article
Orbital structure of vibrations of nanoparticles, clusters, and coordination polyhedra
The necessity of the development of the orbital structure of vibrations of nanoparticles, clusters, and coordination polyhedra is dictated by synthesis of clusters, supermolecules, and other structures of nano...
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Article
Magnetochemistry of dimers with iron group ions
General theory of matrix interactions of dimers of iron group ions is considered. Equations for calculation of matrix elements of the exchange energy of dimers and equations for calculation of the magnetic mom...
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Article
A matrix method for calculating the magnetic properties of Co2+ complex ions
A matrix method for calculating of the magnetic properties of Co2+ complex ions is proposed. The method involves calculations of a full matrix of all interactions existing in the ion. The theoretical results obta...
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Article
Orbital system of nanostructures
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Article
Orbital system of nanosized structures
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Article
Sizes and properties of clusters of magnetic ferrite structures
The structures of the coordination spheres or orbits of hexagonal and cubic crystals and their sizes, coordination numbers, and coordinates of atoms and cavities have been studied. The orbits of atoms of all s...
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Article
Molecular orbitals of polynuclear complexes
The theory of the orbital structure of various complexes and complicated molecules has been further developed, and the scope of application of the orbital model has been extended. Formulas have been suggested ...
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Article
Magic numbers of diamond-like nanostructures
A shell system of diamond- and lonsdalite-like crystal structures has been developed in which nanostructures are represented by nested polyhedral shells, each containing several subshells. The subshells have c...
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Article
Four-dimensional composition-structure-property-dispersity relationship
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Article
Unitary symmetry and classification of the states of n-spin clusters. Magnetic and thermodynamic parameters
The unitary symmetry and classification of spin clusters by spin momenta S are considered on the basis of reduction of the full linear group to unitary groups U 2s + 1 and orthogonal rotat...
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Article
Structure of absorption and luminescence bands in aluminosilicate optical fibers doped with bismuth
Absorption and luminescence spectra of bismuth-doped optical fibers have been measured in the temperature range 77–1000 K. The measured spectra were approximated by Gaussian functions, and the parameters of th...
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Article
Nanostructures: Compositions, structure, and classification
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Article
Classification system for fullerenes
The universal classification of nanoshells developed on the basis of group theory makes it possible to formulate new rules of the composition and structure of fullerenes. The classification shows the possible ...
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Article
Compositions and structures of nanoparticles of trigonal symmetry D 3d : Nanotubes
A method has been developed for the determination of the structure and number of atoms in the shells of nanoparticles as a function of the arrangement of atoms at the symmetry elements of a symmetry group. The...
