Piezoelectric properties of template-free electrochemically grown ZnO nanorod arrays
| Autor: | Serban Lepadatu, Markys G. Cain, Paul M. Weaver, Dimitrios Tamvakos, Luc Piraux, Athanasios Tamvakos, Daniele Pullini, Vlad-Andrei Antohe |
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| Rok vydání: | 2015 |
| Předmět: |
Nanostructure
Materials science Piezoelectric coefficient F300 business.industry Nanogenerator General Physics and Astronomy Nanotechnology Surfaces and Interfaces General Chemistry Substrate (electronics) Condensed Matter Physics Piezoelectricity Surfaces Coatings and Films Crystallinity Piezoresponse force microscopy Optoelectronics Nanorod business |
| Zdroj: | Applied Surface Science. 356:1214-1220 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2015.08.187 |
| Popis: | In this work, we evaluated the piezoelectric properties of the ZnO nanorods (NRs), subsequently grown by a template-free electrochemical deposition (ECD) approach. The one-step preparation method yielded in a relatively short-time synthesis large arrays of high aspect-ratio ZnO NRs, vertically aligned to the substrate and exhibiting a well-defined hexagonal symmetry coupled with an excellent crystallinity. Piezoresponse force microscopy (PFM) was employed to extract the effective piezoelectric coefficient ( d 33 ) of the ZnO [0 0 0 1]-oriented NRs. A mean effective d 33 coefficient of 11.8 pm/V was measured over several individual NRs. The results have shown an increased piezoelectric response of the ZnO NRs, with ∼18% in respect to the ZnO bulk material, and with a factor ranging from 28% to 167% compared to similar ZnO nanostructures prepared by other counterpart techniques. Both morphology and crystalline quality of the obtained ZnO NRs, as well as the piezoelectric investigations, ranked the ECD as a promising low-cost pathway for possibly producing high quality nanostructured ZnO-based piezoelectric devices with enhanced performance. |
| Databáze: | OpenAIRE |
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