Journal of Surface Science and Engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Morphological Studies on TiO2 Nanotubes Formed by Anodizing in Aqueous and Non-Aqueous Solutions

수용액 및 비수용액에서 양극산화법으로 형성된 TiO2 나노튜브의 구조 연구

  • 김병조 (한국기계연구원 부설 재료연구소) ;
  • 문성모 (한국기계연구원 부설 재료연구소) ;
  • 정용수 (한국기계연구원 부설 재료연구소) ;
  • 김병관 (창원대학교 화공시스템공학과)
  • Received : 2010.08.06
  • Accepted : 2010.08.30
  • Published : 2010.08.31
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Abstract

$TiO_2$ nanotubes were formed on Ti by anodizing in 1 M $H_3PO_4$ + 0.3 M HF and 0.1 M $NH_4F$ + 2% $H_2O$ in ethylene glycol, and their surface and cross-sectional morphologies were observed using FE-SEM as a function of anodizing time and applied voltage. The cross-section of the $TiO_2$ nanotubes was readily observed from the small pieces of nanotubes remaining near the scratch lines after scratching of the anodized surface. $TiO_2$ nanotubes was observed to grow faster and thicker in non-aqueous solution than in aqueous solution. Diameter of $TiO_2$ nanotubes was proportional to the applied voltage, irrespective of the type of the electrolyte, and it is recommended to use non-aqueous solutions for the preparation of larger diameter of $TiO_2$ nanotubes.

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