Conceptual Progress for Explaining and Predicting Self-Organization on Anodized Aluminum Surfaces
Over the past few years, researchers have made numerous breakthroughs in the field of aluminum anodizing and faced the problem of the lack of adequate theoretical models for the interpretation of some new experimental findings. For instance, spontaneously formed anodic alumina nanofibers and petal-l...
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| Format: | Article |
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MDPI AG
2021-08-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/9/2271 |
| _version_ | 1797517885268033536 |
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| author | Mikhail Pashchanka |
| author_facet | Mikhail Pashchanka |
| author_sort | Mikhail Pashchanka |
| collection | DOAJ |
| description | Over the past few years, researchers have made numerous breakthroughs in the field of aluminum anodizing and faced the problem of the lack of adequate theoretical models for the interpretation of some new experimental findings. For instance, spontaneously formed anodic alumina nanofibers and petal-like patterns, flower-like structures observed under AC anodizing conditions, and hierarchical pores whose diameters range from several nanometers to sub-millimeters could be explained neither by the classical field-assisted dissolution theory nor by the plastic flow model. In addition, difficulties arose in explaining the basic indicators of porous film growth, such as the nonlinear current–voltage characteristics of electrochemical cells or the evolution of hexagonal pore patterns at the early stages of anodizing experiments. Such a conceptual crisis resulted in new multidisciplinary investigations and the development of novel theoretical models, whose evolution is discussed at length in this review work. The particular focus of this paper is on the recently developed electroconvection-based theories that allowed making truly remarkable advances in understanding the porous anodic alumina formation process in the last 15 years. Some explanation of the synergy between electrode reactions and transport processes leading to self-organization is provided. Finally, future prospects for the synthesis of novel anodic architectures are discussed. |
| first_indexed | 2024-03-10T07:22:27Z |
| format | Article |
| id | doaj.art-af1ea214a73f42c9b57def08076674b0 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T07:22:27Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-af1ea214a73f42c9b57def08076674b02023-11-22T14:29:56ZengMDPI AGNanomaterials2079-49912021-08-01119227110.3390/nano11092271Conceptual Progress for Explaining and Predicting Self-Organization on Anodized Aluminum SurfacesMikhail Pashchanka0Department of Chemistry, Eduard-Zintl-Institute, Technical University of Darmstadt, Alarich-Weiss-Straße 12, 64287 Darmstadt, GermanyOver the past few years, researchers have made numerous breakthroughs in the field of aluminum anodizing and faced the problem of the lack of adequate theoretical models for the interpretation of some new experimental findings. For instance, spontaneously formed anodic alumina nanofibers and petal-like patterns, flower-like structures observed under AC anodizing conditions, and hierarchical pores whose diameters range from several nanometers to sub-millimeters could be explained neither by the classical field-assisted dissolution theory nor by the plastic flow model. In addition, difficulties arose in explaining the basic indicators of porous film growth, such as the nonlinear current–voltage characteristics of electrochemical cells or the evolution of hexagonal pore patterns at the early stages of anodizing experiments. Such a conceptual crisis resulted in new multidisciplinary investigations and the development of novel theoretical models, whose evolution is discussed at length in this review work. The particular focus of this paper is on the recently developed electroconvection-based theories that allowed making truly remarkable advances in understanding the porous anodic alumina formation process in the last 15 years. Some explanation of the synergy between electrode reactions and transport processes leading to self-organization is provided. Finally, future prospects for the synthesis of novel anodic architectures are discussed.https://www.mdpi.com/2079-4991/11/9/2271porous anodic alumina (PAA)chaos and self-organization theoryelectroconvectioncolloidal gel modelanion exchangeDLVO theory |
| spellingShingle | Mikhail Pashchanka Conceptual Progress for Explaining and Predicting Self-Organization on Anodized Aluminum Surfaces Nanomaterials porous anodic alumina (PAA) chaos and self-organization theory electroconvection colloidal gel model anion exchange DLVO theory |
| title | Conceptual Progress for Explaining and Predicting Self-Organization on Anodized Aluminum Surfaces |
| title_full | Conceptual Progress for Explaining and Predicting Self-Organization on Anodized Aluminum Surfaces |
| title_fullStr | Conceptual Progress for Explaining and Predicting Self-Organization on Anodized Aluminum Surfaces |
| title_full_unstemmed | Conceptual Progress for Explaining and Predicting Self-Organization on Anodized Aluminum Surfaces |
| title_short | Conceptual Progress for Explaining and Predicting Self-Organization on Anodized Aluminum Surfaces |
| title_sort | conceptual progress for explaining and predicting self organization on anodized aluminum surfaces |
| topic | porous anodic alumina (PAA) chaos and self-organization theory electroconvection colloidal gel model anion exchange DLVO theory |
| url | https://www.mdpi.com/2079-4991/11/9/2271 |
| work_keys_str_mv | AT mikhailpashchanka conceptualprogressforexplainingandpredictingselforganizationonanodizedaluminumsurfaces |