Droplet-Scale Conversion of Aluminum into Transparent Aluminum Oxide by Low-Voltage Anodization in an Electrowetting System
A localized conversion of aluminum into transparent aluminum oxide by droplet-scale anodization is demonstrated in this work. The anodized region can be contained and controlled on the basis of the electrowetting response of the droplet. A highly uniform and transparent anodized spot was achieved us...
| Veröffentlicht in: | Langmuir : the ACS journal of surfaces and colloids. - 1999. - (2025) vom: 06. Jan. |
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| Weitere Verfasser: | , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2025
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| Zugriff auf das übergeordnete Werk: | Langmuir : the ACS journal of surfaces and colloids |
| Schlagworte: | Journal Article |
| Zusammenfassung: | A localized conversion of aluminum into transparent aluminum oxide by droplet-scale anodization is demonstrated in this work. The anodized region can be contained and controlled on the basis of the electrowetting response of the droplet. A highly uniform and transparent anodized spot was achieved using an anodization voltage of 2 V for 10 min. We analyzed the chemical evolution during the formation of the transparent oxide layer using X-ray photoelectron spectroscopy, which revealed the dynamic interplay between Al(OH), AlO(OH), and Al2O3 formation and dissolution during the conversion process. The dominant presence of aluminum oxide/hydroxide on the transparent spot after anodization was observed. The morphological characteristics of the transparent oxide layer exhibited a reduction in surface roughness as anodization time increased. Additionally, the formation of randomly distributed nanopores was observed in the anodized samples. X-ray diffraction results revealed the amorphous nature of the produced transparent oxide layer. This droplet-scale anodization technique can be extended to other transparent metal oxides, providing an environmentally friendly and cost-effective fabrication route toward sustainable electronics and other related applications |
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| Beschreibung: | Date Revised 06.01.2025 published: Print-Electronic Citation Status Publisher |
| ISSN: | 1520-5827 |
| DOI: | 10.1021/acs.langmuir.4c03303 |