Rajagopalan P, Singh Vipul, Palani I A
Mechatronics and Instrumentation Lab, Discipline of Metallurgy Engineering and Materials Science, Indian Institute of Technology Indore, Indore, India.
Nanotechnology. 2018 Mar 9;29(10):105406. doi: 10.1088/1361-6528/aaa6bd.
Zinc oxide (ZnO) is a remarkable inorganic semiconductor with exceptional piezoelectric properties compared to other semiconductors. However, in comparison to lead-based hazardous piezoelectric materials, its properties have undesired limitations. Here we report a 5∼6 fold enhancement in piezoelectric features via chemical doping of copper matched to intrinsic ZnO. A flexible piezoelectric nanogenerator (F-PENG) device was fabricated using an unpretentious solution process of spin coating, with other advantages such as robustness, low-weight, improved adhesion, and low cost. The device was used to demonstrate energy harvesting from a standard weight as low as 4 gm and can work as a self-powered mass sensor in a broad range of 4 to 100 gm. The device exhibited a novel energy harvesting technique from a wind source due to its inherent flexibility. At three different velocities (10∼30 m s) and five different angles of attack (0∼180 degrees), the device validated the ability to discern different velocities and directions of flow. The device will be useful for mapping the flow of air apart from harvesting the energy. The simulation was done to verify the underlining mechanism of aerodynamics involved.
氧化锌（ZnO）是一种卓越的无机半导体，与其他半导体相比具有特殊的压电特性。然而，与铅基有害压电材料相比，其性能存在不理想的局限性。在此，我们报告通过与本征ZnO匹配的铜化学掺杂，压电特性提高了5至6倍。使用简单的旋涂溶液工艺制造了一种柔性压电纳米发电机（F-PENG）装置，该装置还具有其他优点，如坚固性、低重量、附着力增强和成本低。该装置用于展示从低至4克的标准重量中收集能量，并且可以在4至100克的广泛范围内作为自供电质量传感器工作。由于其固有的柔韧性，该装置展示了一种从风源收集能量的新颖技术。在三种不同速度（10至30米/秒）和五种不同攻角（0至180度）下，该装置验证了辨别不同流速和流向的能力。该装置除了收集能量外，还将有助于绘制气流图。进行了模拟以验证所涉及的空气动力学潜在机制。
