Article Title

Fabrication of periodically aligned vertical single-crystalline anatase TiO₂ nanotubes with perfect hexagonal open-ends using chemical capping materials

Authors

Hui Song, School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
Kyubong Jo, Department of Chemistry and Interdisciplinary Program of Integrated Biotechnology, Sogang University, Seoul, Republic of Korea
Bock Young Jung, Department of General Dentistry, College of Dentistry, Yonsei University, Seoul, Republic of Korea
Gun Young Jung, School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea

Keywords

TiO2 nanotubes, chemical capping material, ZnO nanorod template, laser interference lithography

Abstract

ABSTRACT A vertically aligned anatase TiO2 (A-TiO2) nanotube array has been fabricated by coating a ZnO nanorod (NR) template with a TiO2 precursor solution. After coating, the ZnO NR cores were selectively etched in an acidic environment to form TiO2 nanotubes (NTs). More specifically, after growing the ZnO NRs via a hydrothermal method, one drop of the TiO2 precursor solution was cast to coat the ZnO NRs, the tops of which were previously covered with chemical capping materials by electrostatic interaction, and then the sample was sintered. Finally, the sample was immersed in an acidic solution resulting in selective etching of the ZnO NR cores. Thus, only TiO2 NTs remained on the substrate. The capping material is effectively used to create a perfect, hexagonal open-ended TiO2 NT array, which interestingly extends onset absorption towards the visible region.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-013-0377-8

Publisher

Tsinghua University Press

Recommended Citation

Hui Song,Kyubong Jo,Bock Young Jung,Gun Young Jung, Fabrication of periodically aligned vertical single-crystalline anatase TiO2 nanotubes with perfect hexagonal open-ends using chemical capping materials. NanoRes.2014, 7(1): 104-109