Proceedings of the Korean Institute of Surface Engineering Conference (한국표면공학회:학술대회논문집)

The Korean Institute of Surface Engineering (한국표면공학회)
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Transformation of TiO2 Film to Titanate Nanotube Thin Film Using Hydrothermal Method

  • Guo, Yupeng (Institute/faculty of Nanotechnologies and Advanced materials Engineering, Sejong University) ;
  • Lee, Nam-Hee (Institute/faculty of Nanotechnologies and Advanced materials Engineering, Sejong University) ;
  • Oh, Hyo-Jin (Institute/faculty of Nanotechnologies and Advanced materials Engineering, Sejong University) ;
  • Yoon, Cho-Rong (Institute/faculty of Nanotechnologies and Advanced materials Engineering, Sejong University) ;
  • Kim, Sun-Jae (Institute/faculty of Nanotechnologies and Advanced materials Engineering, Sejong University)
  • Published : 2007.04.05
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Abstract

In this study, the technology to grow oriented nanotube thin film from dip-coated $TiO_2$ using hydrothermal method has been successfully developed. The effects of preparation parameters, such as reaction temperature, duration and post treatment conditions on the film morphologies and the adherence to the substrate, have been examined. A general formation mechanism of oriented titanate nanotube thin film is proposed in terms of the detailed observation of the products via two dimensional surface FESEM studies and HRTEM images. The overall formation of $TiO_2-based$ nanotube thin film can be summarized with three successive steps: (1) $TiO_2$ dissolving and amorphous $Na_2TiO_3$ deposition process; (2) layered $Na_2Ti_3O_7$ formation via spontaneous crystallization and rapid growth process; (3) formation of nanotube thin film via $Na_2Ti_3O_7$ splitting and multilayer scrolling process of (100) planes around the c axis of $Na_2Ti_3O_7$.

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