Registration Number
0224U031640,
(0120U104105)
, R & D reports
Title
Modeling of random heterogeneous and fluctuationally inhomogeneous systems and diagnostics of their electrical and optical characteristics
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Моделювання невпорядкованих гетерогенних та флуктуаційно-неоднорідних систем та діагностика їх електричних і оптичних характеристик
Head
Sushko Myroslav Ya.,
Registration Date
29-05-2024
Organization
Odessa I. I. Mechnikov National University
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Development, testing and application of many-particle electrodynamic models for description of electrical and optical characteristics of mesoscopically disordered systems of various physical nature; scrutinizing with their help of the individual contributions from the microstructure elements and physico-chemical mechanisms in those systems to the formation of the above characteristics.
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A rigorous many-particle model is developed for the electrical conductivity of suspensions of nanoparticles whose electrical double layer incorporates the Stern layer, stagnant layer, and mobile external part. Based on it, an essential role of the stagnant layer in the formation of the electrical conductivity of these suspensions is revealed; criteria for different types of behavior of the conductivity to occur are determined; and the conductivity and thickness of the stagnant layer for suspensions of nanoparticles in aqueous electrolyte solutions are evaluated.
A calculational technique, accounting for reemission and correlation effects of higher orders, is developed for the optical characteristics of photon transport in concentrated suspensions of particles with stagnant layers. The mean-free-path length of photons in concentrated suspensions of hard spheres is investigated as a function of the volume concentration and the refractive indices of the spheres. New procedures for measuring the zeta-potential in suspensions of nanoparticles are proposed which assume a combined analysis of electrical spectroscopy data and those obtained either for the hydrodynamic radius of the particles from laser correlation spectroscopy measurements or for the photon transport characteristics.
A theory is developed and tested for quasistatic dielectric response of systems of anisotropic particles of different types, including systems of anisotropic spheres, mixtures of crystallites, and polycrystals
Product Description
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Balika Svitlana D.
Sushko Myroslav Ya.
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2024-05-29
