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Sensors 2016, 16(4), 431; doi:10.3390/s16040431

Fabrication of ZnO Nanowires Arrays by Anodization and High-Vacuum Die Casting Technique, and Their Piezoelectric Properties

Department of Industrial Education, National Taiwan Normal University, Taipei 10610, Taiwan
Graduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 10608, Taiwan
Author to whom correspondence should be addressed.
Academic Editor: Teen-Hang Meen
Received: 19 January 2016 / Revised: 19 March 2016 / Accepted: 22 March 2016 / Published: 24 March 2016
View Full-Text   |   Download PDF [5144 KB, uploaded 24 March 2016]   |  


In this investigation, anodic aluminum oxide (AAO) with arrayed and regularly arranged nanopores is used as a template in the high-vacuum die casting of molten zinc metal (Zn) into the nanopores. The proposed technique yields arrayed Zn nanowires with an aspect ratio of over 600. After annealing, arrayed zinc oxide (ZnO) nanowires are obtained. Varying the anodizing time yields AAO templates with thicknesses of approximately 50 μm, 60 μm, and 70 μm that can be used in the fabrication of nanowires of three lengths with high aspect ratios. Experimental results reveal that a longer nanowire generates a greater measured piezoelectric current. The ZnO nanowires that are fabricated using an alumina template are anodized for 7 h and produce higher piezoelectric current of up to 69 pA. View Full-Text
Keywords: ZnO nanowires; anodic aluminum oxide (AAO); vacuum die casting ZnO nanowires; anodic aluminum oxide (AAO); vacuum die casting

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Kuo, C.-G.; Chang, H.; Wang, J.-H. Fabrication of ZnO Nanowires Arrays by Anodization and High-Vacuum Die Casting Technique, and Their Piezoelectric Properties. Sensors 2016, 16, 431.

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