Anodic formation of titania nanotubes with ultrahigh aspect ratio

Keisuke Nakayama*, Takaya Kubo, Yoshinori Nishikitani

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


We report on the anodic formation of titania nanotubes with a uniform diameter of about 20 nm and an aspect ratio over 1000:1 in an HClO4 solution. The as-prepared product was obtained as an amorphous structure, which can be crystallized to a pure anatase structure with hollow characteristics remaining. The cross-sectional scanning electron microscopy images of interfaces between the Ti substrate and titania indicate that the gradual structural transformation of titania induced by concentrated ion species via localized electrochemical reactions is the underlying mechanism for the formation of nanotubes.

Original languageEnglish
JournalElectrochemical and Solid-State Letters
Issue number3
Publication statusPublished - 2008
Externally publishedYes

ASJC Scopus subject areas

  • Electrochemistry
  • Materials Science(all)


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