Transformation of the Nanoporous Structure of Anodic Aluminium Oxide and its “Nonelectrolysis” Electroluminescence

Abstract:

On a film of aluminum oxide (Al₂O₃) formed by electrolytic oxidation in distilled water (DW), the growth, transformation of its nanoporous structure, and the generation of electroluminescence (EL) in ketones and related compounds containing carbonyl groups were studied. For those contributing to the brightest EL – acetylacetone and methylpyrrolidone, it was found that the processes described in these electrolytes proceed with the highest intensity. Under the same electrolytes and conditions, similar processes, but with a lower intensity, proceed for A₂O₃ formed on pure aluminum. It was found that, with the external voltage, thermodynamic and geometrical parameters of the electrolytic system being constant, the brightness characteristics of the EL of the anodic Al₂O₃ are influenced by its structural organization and the electrophysical characteristics of the electrolyte surrounding the oxide film, which is proposed to be arbitrarily called “nonelectrolysis” because electrolysis products are not revealed in it.

• Periodical: Solid State Phenomena (Volume 312)
• Pages: 166-171
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.312.166
• Online since: November 2020
• Authors: Dmitry Ovechenko, Alexander Boychenko*
• Keywords: Aluminium Oxide, Anodizing, Distilled Water, Electroluminescence, Ketones

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