Cleavage of alumina cells in organic acid solutions during high voltage anodization
| Autor: | Giedrė Grincienė, Katsiaryna Chernyakova, Arunas Jagminas, Algis Selskis |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Nanotube
Materials science Aqueous solution Anodizing Graphene technology industry and agriculture Oxide General Physics and Astronomy 02 engineering and technology equipment and supplies 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Barrier layer chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Chemical engineering law Tartaric acid Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Physical Chemistry Chemical Physics. 21:14941-14944 |
| ISSN: | 1463-9084 1463-9076 |
| Popis: | The split effect of porous alumina cells with the formation of nanotubular films has been reported in several papers, however, many unclear aspects of such growth still remain. In this study, the possible mechanism of alumina nanotube formation in an aqueous solution of tartaric acid was proposed. According to SEM, EDX, and XPS studies, entrapment of carbonaceous species in large amounts, especially at the back-side, proceeds due to cleavage of the barrier layer at extremely high current density. The transport of anions through these gaps to the metal|film interface and reduction therein leads to the formation of a composite film with alumina/carbon/graphene oxide nanoplatelet caps. |
| Databáze: | OpenAIRE |
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