Self-ordering Regimes of Porous Alumina: The 10 Porosity Rule
| Autor: | Kathrin Schwirn, Jinsub Choi, Kornelius Nielsch, Ralf B. Wehrspohn, Ulrich Gösele |
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| Rok vydání: | 2002 |
| Předmět: |
Materials science
Anodizing Mechanical Engineering chemistry.chemical_element Bioengineering General Chemistry Electrolyte Radius Condensed Matter Physics Electrochemical anodization Crystallography chemistry Aluminium Transmission electron microscopy General Materials Science Composite material Porosity Self ordering |
| Zdroj: | Nano Letters. 2:677-680 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/nl025537k |
| Popis: | Transmission electron microscopy analysis of self-ordered porous alumina obtained by electrochemical anodization shows that self-ordering requires a porosity of 10%, independent of the specific anodization conditions. This corresponds to a volume expansion of alumina to aluminum of about 1.2. We propose that self-ordering of porous alumina with any interpore distance is possible if the applied potential, which mainly determines the interpore distance, and the pH value of the electrolyte, which mainly defines the pore radius, match the 10% porosity rule. |
| Databáze: | OpenAIRE |
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