Ideal hexagonal order: Formation of self-organized anodic oxide nanotubes and nanopores on a Ti-35Ta alloy

Wei Wei, Steffen Berger, Nabeen Shrestha, Patrik Schmuki

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

In this work, we report on the formation of highly aligned nanoporous or nanotubular oxide structures by anodization of Ti-Ta alloys in NH4 F containing ethylene glycol electrolytes. We show that depending on the anodization conditions, either a hexagonally self-organized nanoporous layer or a nanotube array can be formed. Critical factors that decide on tube or pore formation are the water content of the electrolyte and the applied voltage. The present approach provides hexagonally packed oxide structures with an order comparable to that of the gold standard, anodized alumina. Layers of thicknesses >10 μm and individual pore diameter in the range of 27-50 nm can easily be produced.

Original languageEnglish
Pages (from-to)C409-C413
JournalJournal of the Electrochemical Society
Volume157
Issue number12
DOIs
StatePublished - 2010

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