期刊
NANO RESEARCH
卷 7, 期 1, 页码 104-109出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-013-0377-8
关键词
TiO2 nanotubes; chemical capping material; ZnO nanorod template; laser interference lithography
类别
资金
- Basic Science Research program through the National Research Foundation of Republic of Korea
- Ministry of Science, ICT & Future Planning (NRF, CLEA, NCRC) [R15-2008-006-03002-0]
- Pioneer Research Center Program (NRF) [2013M3C1A3063046]
- Ministry of Education and Science Technology (MEST) [2011-0029414]
- National Research Foundation of Korea [2011-0029414] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
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