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Fabrication and wetting characteristics of vertically self-aligned ZnO nanorods formed by anodic aluminum oxide template

[+] Author Affiliations
Tzung-Ta Kao

National Kaohsiung First University of Science and Technology, Graduate Institute of Electrical Engineering, 1 University Road, Kaohsiung 824, Taiwan

Yi-Yen Chiu

National Kaohsiung First University of Science and Technology, Graduate Institute of Electrical Engineering, 1 University Road, Kaohsiung 824, Taiwan

J. Micro/Nanolith. MEMS MOEMS. 13(1), 013003 (Jan 13, 2014). doi:10.1117/1.JMM.13.1.013003
History: Received September 24, 2013; Revised October 22, 2013; Accepted November 4, 2013
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Abstract.  The growth of vertically self-aligned ZnO nanorods in an anodic aluminum oxide (AAO) template is investigated, along with their wetting characteristics. The highly ordered through-hole AAO template was prepared from an aluminum foil of 99.95% purity in a mixed solution of phosphoric and oxalic acids at 160 V at 1°C, and the resulting pore diameter and channel length are 250 nm and 2 μm, respectively. The vertically self-aligned ZnO nanorods produced with AAO template show the wetting transition time from hydrophobic to superhydrophilic under UV illumination in 9 min. This fast transition time is attributed to the high surface area to volume ratio of the ZnO nanorods and the adsorption enhancement of water molecules by UV-generated electron-hole pairs.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Tzung-Ta Kao and Yi-Yen Chiu
"Fabrication and wetting characteristics of vertically self-aligned ZnO nanorods formed by anodic aluminum oxide template", J. Micro/Nanolith. MEMS MOEMS. 13(1), 013003 (Jan 13, 2014). ; http://dx.doi.org/10.1117/1.JMM.13.1.013003


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