Low frequency accelerator sensor based on piezoelectric ZnO nanorods grown by low temperature scalable process

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• 作者：Eiman Satti Nour ; Chan Oeurn Chey ; Magnus Willander and Omer Nur
• 刊名：physica status solidi (a)
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：213
• 期：9
• 页码：2503-2508
• 全文大小：845K
• ISSN：1862-6319

文摘

Piezoelectric vertically aligned zinc oxide (ZnO) nanorods (NRs) were grown by low temperature aqueous chemical approach and successfully used as a low frequency self-powered accelerator detector system. The nanogenerator (NG) device was tested under the influence of low frequency vibrations, different load masses, and finger prints pressure. The experimental results show relatively high sensitivity to frequencies as low as 5 Hz. This energy conversion device has produced a maximum output voltage of about 0.3 and 1.4 V under a frequency of 41 Hz and a mass of 1000 g, respectively. The fabricated NG can be used as an accelerator sensor with a good performance in the range from about 0.67 to 5.5 m s⁻² with a sensitivity of 0.045 V s² m⁻¹. Furthermore, it has been demonstrated that the NG is able to harvest energy under finger-print scanning. The result from the finger-print pressure was consistent with the masses testing results. This energy-harvesting technology also provides a simple and cost-effective platform to capture low-frequency mechanical energy, i.e., body movements, and other applications like developing a sensitive finger print camera, etc.