Piezoelectric Property of ZnO Nanowires by High Vacuum Die-Casting Process
| Autor: | Jian-Hao Wang, 王建豪 |
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| Rok vydání: | 2014 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 102 Zinc oxide crystallizes in hexagonal wurtzite, and it has no inversion symmetry (reflection of a crystal relative to any given point does not transform it into itself). Zinc oxide has superb piezoelectricity of the hexagonal ZnO. Besides, recent researches focus on piezoelectric power generation from ZnO nanowire due to its semiconductor properties. In this study, the Zn melt was injected into an anodic aluminum oxide (AAO) template by high vacuum casting technique to obtain aspect ratio of 600 of Zn nanowire arrays. After annealing, Zn nanowire arrays will become ZnO nanowire arrays. With various time of anodizing process, we can respectively obtain AAO template with thickness of 50 μm、60 μm、70 μm, in order to fabricate high aspect ratio and three different length of nanowire, also discuss its mechanic properties and piezoelectric characteristics. And we do analysis of its surface morphology, crystal structure and property inspections by scanning electron microscopy (SEM), X-ray diffractometer (XRD) and atomic force microscope (AFM). Under the piezoelectric property test of conductive-AFM, the results showed the longer nanowire can output larger current, the ZnO nanowire made by AAO template anodized 7 hours has largest current output of 69 pA. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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