Abstract
The results of studying the conditions of synthesis and luminescence of aluminum oxide nanoparticles in a plasma of an overstressed nanosecond discharge ignited between aluminum electrodes at an interelectrode distance of 2 mm and air pressure in the range of 50-202 kPa are presented. It was shown that the plasma of the investigated discharge is characterized by a wide luminescence band in the spectral range of 300–430 nm, which is associated with the formation of F and F + centers. The research results can be used in micro-nanotechnology, biomedical engineering to obtain nanostructured alumina substrates, on which other nanodevices and films from biomaterials can be placed. The aim of the work was to establish the possibility of detecting small nanoparticles - aluminum oxide nuclei by emission spectroscopy methods and the synthesis of nanostructured alumina films under atmospheric conditions (without the use of vacuum technology) over a large area.
Highlights
The results of a study of the characteristics and kinetics of processes in a heterogeneous plasma based on mixed flows of a buffer gas -argon, an oxidizing agent, and aluminum dustare presented by Bityurin et al [1, 2]
We studied the plasma of glow and pulsed discharges, as well as a combined high-frequency discharge in mixtures of argon, water vapor, and aluminum dust
This study presents the results of characteristics and parameters of an overstressed nanosecond atmospheric pressure discharge in air and argon at atmospheric pressure between aluminum electrodes and the luminescence characteristics of aluminum oxide nanostructures that were synthesized under the conditions of this experiment
Summary
The results of a study of the characteristics and kinetics of processes in a heterogeneous plasma based on mixed flows of a buffer gas -argon, an oxidizing agent (water molecules), and aluminum dustare presented by Bityurin et al [1, 2]. We studied the plasma of glow and pulsed discharges, as well as a combined high-frequency discharge in mixtures of argon, water vapor, and aluminum dust In such plasma, the gas component, liquid droplets, solids, and plasma simultaneously coexist. The price of obtaining a hydrogen molecule does not exceed 1.5 eV/molecule, which is much more economical than the hydrolysis method of producing hydrogen It is of interest, in order to simplify the design of the reactor, to replace the generator of aluminum dust with a size of tens of microns by producing microdroplets of aluminum by exploding micropoints on the surface of aluminum electrodes in a strong electric field of a nanosecond discharge (ecton formation [4]). A discharge was ignited between aluminum and graphite electrodes in air and was Shuaibov et al, 2020
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