Grishchuk O. Dielectric approach for description of interaction of small particles in an electrolyte solution and under electromagnetic radiation

The thesis is devoted to the development of theoretical methods for calculating the interaction energy of small particles placed in the electrolyte solution, the processes of absorption of electromagnetic radiation by disperse systems with particles of spherical or ellipsoidal form with a homogeneous or heterogeneous structure with regard to these surface excitations and to examination of scattering electromagnetic radiation on aerosol particles. A general theoretical effective method has been developed for calculating the pair interaction energy for small particles placed in the electrolyte solution and described by arbitrary radii and surface potentials. New approaches have been suggested taking into account the impact of the electrolyte medium for theoretical description of the interaction between small particles. A numerical method has been developed for calculation of electrodynamics characteristics of the interaction between electromagnetic radiation and disperse systems with structurally heterogeneous inclusions. Frequency dependences have been obtained of effective dielectric function for disperse systems with the double-layer inclusions "dielectric-semiconductor" placed in the electric field. Numerical calculations carried out indicate a possibility to control the values of resonant frequencies via changing the thickness of the semiconductor membrane. When calculating frequencies of surface modes of metal spheroid their eigen values have been found to depend on the dielectric characteristics of the spheroid and its environment. Numerical calculations have been conducted on specific intensity of the radiation reflected from the planar layer of aerosol-disperse environment as dependent on the size, refractive index of scattering of small particles, and the wavelength of incident electromagnetic radiation. Numerical-analytical procedure has been developed for calculating the interaction of incident electromagnetic radiation with plane-parallel layer of aerosol-disperse environment.