Highly ordered self-organized TiO2 nanotube arrays prepared by a multi-step anodic oxidation process
- Authors
- Han, S. C.; Doh, J. M.; Yoon, J. K.; Kim, G. H.; Byun, J. Y.; Han, S. H.; Hong, K. T.; Kwun, S. I.
- Issue Date
- 6월-2009
- Publisher
- KOREAN INST METALS MATERIALS
- Keywords
- TiO2 nanotube; multi-step anodic oxidation; fluoride containing electrolyte
- Citation
- METALS AND MATERIALS INTERNATIONAL, v.15, no.3, pp.493 - 499
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- METALS AND MATERIALS INTERNATIONAL
- Volume
- 15
- Number
- 3
- Start Page
- 493
- End Page
- 499
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/119974
- DOI
- 10.1007/s12540-009-0493-x
- ISSN
- 1598-9623
- Abstract
- Highly ordered TiO2 nanotube arrays were prepared using a self-templating multi-step anodic oxidation process in a fluoride-containing electrolyte. The microstructures, chemical compositions, and phases of the self-organized TiO2 nanotube arrays were analyzed by FESEM, XPS, and XRD, respectively. Hexagonal packing density in TiO2 nanotube arrays significantly improved after the the multi-step anodic oxidation. The area densities of the hexagonal TiO2 nanotube arrays increased approximately 3 times from the first to second step in the anodic oxidation steps process (4.9 mu m(-2) to 16.4 mu m(-2)), but there was no difference between the second and third step (16.4 mu m(-2) to 16.0 mu m(-2)). The as-anodized TiO2 nanotube array had an amorphous structure and it transformed to an anatase phase during the annealing process at 450 A degrees C for 1 h. The as-anodized TiO2 nanotube arrays adsorbed the fluoride, hydrocarbon groups (CH), hydroxyl groups (OH, C-OH), and carboxyl groups (O = C-OH) on their surfaces.
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