Поляризовність системи двох малих частинок із урахуванням мультипольної взаємодії між ними
Abstract
POLARIZABILITY SYSTEM OF TWO PARTICLES WITH MULTIPOLE INTERACTION
N. Shkoda, S. Shostak
A study on the processes of interaction of electromagnetic radiation (EMR) with the band of small particles (SP) is presented with enormous interest, both from the point of view of non-destructive control of surface and due to creation of composite materials with the in advance set electrodynamics’ properties.
In general, a few factors have an influence on descriptions of spectra of absorption, such as: height, width and position of peaks of SP. These factors are examined in the classic theory, comfortably to unite in groups which answer the types of interaction in the system of small particles. We will transfer these interactions in order of their diminishing intensity and, accordingly, their influence on light-spectra of absorption of such systems.
First, we look at interaction of SP with the external electromagnetic field. It is conditioned only descriptions of SP — their form, measuring, structure (by the presence of shells, additional layers etc.) and properties of material which they are made from.
Second, we look at interaction between particles in the system of SP. This interaction is a conditioned character of the spatial distributing of SP (dense distributing; for SP of non-spherical form matters also character of their spatial orientation: whether it is well-organized or chaotic), and also distributing character of them on sizes (mono- or polidisperse distributing).
The purpose of research - the study of the nature of the electrodynamic response system of SP are in the external electric field; determine the polarization of small particles, the frequency of surface events, and analysis of frequency spectrum of surface excitations dipole interaction of particles with each other.
On the basis of our study and the results developed by us, the general theory of interaction of nanoparticles can assert with various surfaces (including biological), that multipole interaction arises up only in presence the external electric field and it causes the change in electrodynamical properties of both SP and to the surface – redistribution of charges, change in position of peaks and change in intensity of absorption of electromagnetic radiation of the system of nanoparticles, being on-the-spot.
Character of change of processes of absorption and dispersion, depends both nanoparticles and surface on the electrodynamics’ parameters of surface and nanoparticles (effective inductivities, physical and chemical state of surface et cetera). It enables us to get information about the physical and chemical parameters of surface on the basis of analysis of light-spectra of absorption of the small particles and molecules adsorbed on them.
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