Radiation Emission by Nanoparticles in Heterogeneous Plasma with a Condensed Dispersed Phase

Abstract

In the framework of the statistical "cell" approach to the description of the ionization in heterogeneous plasma (HP), the mechanism of braking radiation generation in the bulk of heterogeneous plasma formations has been studied. A new model was proposed for the description of the effective interaction between microfields and charges in plasma. The stochastic motion of charged particles in HP is considered as an evolution of anharmonic oscillations executed by separate charges in an instant field of electric forces in the electroneutral cell. The effective values of frequency and the specific integral power of the braking radiation from HP in the radio-frequency spectral range are calculated by averaging over the ensemble of cells. The amplitude-frequency function and the relative contributions of separate oscillation modes of plasma charges to the emitted radiation intensity are determined in the framework of the random phase approximation. A comparative analysis of the data obtained in the model theory and the experimental ones obtained for plasma with aluminum oxide nanoparticles was carried out in the space of key HP parameters. A good agreement was obtained between the results of computer-assisted simulation and the experimental data both at the qualitative and quantitative levels. Possibilities to apply the results obtained for making telediagnostics of heterogeneous plasma formations were discussed. K e y w o r d s: cell, quasi-neutrality, heterogeneous plasma formation (HPF), heterogeneous plasma, condensed dispersed phase (СDPh), braking radio-frequency radiation of the plasma, telediagnostics.

Температурна І Концентраційна Залежність Дзета-Потенціалу Макромолекул Альбуміну У Водно-Сольовому Розчині Згідно З Комірковою Моделлю

“…First, let us consider a dilute aqueous solution of albumin, when the influence of a molecule on another one is insignificant. To evaluate the zeta potential in this case, we apply the Debye equation with all standard approximations [16][17][18][19].…”

“…In order to determine the zeta potential of the albumin macromolecule, let us apply the method that was proposed in works [18,19] to describe the electrical properties of dust plasma. According to research [25], an albumin molecule in the solution acquires a shape that depends on the pH value.…”

“…The potential distribution also considerably changes owing to the in- fluence of all other proteins in plasma, because the total volume occupied by proteins (except albumin) is equal to the total fractional volume of albumin macromolecules. In this case, it is necessary to apply a new method for the calculation of the zeta potential, which is known in the literature as the cellular model [18,19].…”

“…1). In this case, a more adequate description can be achieved making use of the cellular model (see works [18,19]).…”