Formation of anodic TiO2 nanotube arrays with bimodal pore size distribution

Zixue Su*, Linjie Zhang, Feilong Jiang, Wuzong Zhou, Zhonghua Deng, Yongge Cao, Maochun Hong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

It is revealed that TiO2 nanotube arrays fabricated by anodization of the widely used polycrystalline hexagonal Ti foils have a bimodal pore size distribution rather than the commonly believed monomodal distribution manner. As characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), it is shown that nanotubes grown on the Ti (0001) plane have thinner barrier thickness, smaller pore size, shorter tube length and better crystallinity than those grown on other planes, due to the enhanced electron transfer reaction and lower oxide formation efficiency on the Ti (0001) plane. When (0001) oriented Ti thin films deposited by RF magnetron sputtering are anodized, the pore sizes of the grown anodic TiO2 nanotubes distribute monomodally and are close to the smaller pore size of the bimodally distributed TiO2 nanotubes grown on polycrystalline Ti foils under the same conditions. (c) 2013 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)67-70
Number of pages4
JournalElectrochemistry Communications
Volume31
DOIs
Publication statusPublished - Jun 2013

Keywords

  • TiO2 nanotubes
  • Pore size distribution
  • Electrochemical anodization
  • Crystallographic orientation
  • SELF-ORGANIZATION
  • ORIENTATION
  • MECHANISM
  • TITANIUM
  • GROWTH
  • SCALES
  • LAYERS
  • FILMS
  • CELLS

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