The effect of cluster formation in a fullerene mixture C_60/70 (D_5h-C₇₀ — 95 mass percent and I_h-C₆₀ — 5 mass percent) solution in toluene on the electronic properties and the infrared absorption spectra during long-term (60 days) storage under isotermic conditions is studied. The features of the structure of (C _60/70)_N clusters have been studied using high-resolution transmission electron microscopy and a fractal mechanism is proposed for the formation of large (~291.4 nm) stable clusters, which may contain up to ~19698 molecules of C₇₀ and ~1036 molecules of C₆₀. The precise values of the nonlinear optical susceptibility χ⁽³⁾ _xyyx (ω) of the C_60/70 solutions for different laser beam polarizations (in the range of ellipticities θ = 0.1 − 0.8) are determined. The physical mechanisms of the laser-induced optical activity of a C_60/70 solution in toluene are discussed.

The problems of how to optimize the geometric parameters of the paraboloid-cylinder-receiver (PC-R) system of thermal power plants are examined. The optimal opening angles of the...

Semiconductor nanowhiskers, particularly nanostructured whiskers based on zero-dimensional (0D) C₇₀ fullerene, are being actively discussed due to the great potential of their application in modern electronics. For the first time, we proposed and implemented a method for the synthesis of nanostructured C₇₀ fullerene whiskers based on the self-organization of C₇₀ molecules during the thermal evaporation of C₇₀ droplets on the substrate surface. We found that the onset of the synthesis of C₇₀ nanowhiskers upon the evaporation of drops of a C₇₀ solution in toluene on the substrate surface depends on the substrate temperature. We have provided experimental evidence that an increase in both the C₇₀ concentration in the initial drop and the substrate temperature leads to an increase in the geometric dimensions of C₇₀ nanowhiskers. The obtained results provide useful vision on the role of solute concentration and substrate temperature in the synthesis of one-dimensional materials.

The first results of experimental investigations concerning laser radiation generation with pumping by concentrated solar radiation flux at the Big Solar Furnace of Materials Science Institute of...

A numerical model of a linear Frensel reflector (LFR) with oriented facets is suggested. The concentrating performances of linear Frensel reflectors are determined by considering the errors of...