Here, we report the adsorption effect of NO 2 on ZnO (100 nm) nanowires. We have studied the effect of adsorbed NO 2 molecules on ZnO nanowire-based energy harvester for an exposure time of 1, 2, 3, 4, 5 and 6 h in a sealed chamber at 50 ppm which yielded piezoelectric voltage of 543.6 mV, 834.6 mV, 1.071 V, 1.78 V, 1.969 V and 2.835 V, respectively. We have thoroughly investigated the behaviour of ZnO nanowires in the presence of NO 2 and observed a maximum output piezoelectric voltage of 2.835 V with a power density 158.2 mW cm −2 . This is the first time that ZnO-based piezoelectric energy harvester is being used for the voltage enhancement in the presence of NO 2 . We have used vertically integrated nanowire generator (VING) structure. X-ray diffraction pattern revealed the growth orientation of ZnO nanowires were along the c -axis from the substrate. ZnO nanowires were grown on indium tin oxide-coated polyethylene terephthalate substrates via a hydrothermal route. Surface morphology has been examined by scanning electron microscopy images and diameter of ZnO nanowires was found to be around 100 nm. Piezoelectric voltage has been generated by the VING by applying minute external force of ~50 nN. Periodic output voltage peaks were being measured by picoscope 5204.

中文翻译：

---

NO2 对 ZnO（100 nm）纳米线的吸附作用，导致反向漏电流降低和电压增强

在这里，我们报告了 NO 2 对 ZnO (100 nm) 纳米线的吸附作用。我们研究了吸附的 NO 2 分子对基于 ZnO 纳米线的能量收集器的影响，在 50 ppm 的密封室中暴露时间为 1、2、3、4、5 和 6 小时，产生的压电电压为 543.6 mV、834.6 mV、1.071 V、1.78 V、1.969 V 和 2.835 V。我们已经彻底研究了 ZnO 纳米线在 NO 2 存在下的行为，并观察到最大输出压电电压为 2.835 V，功率密度为 158.2 mW cm -2 。这是首次使用基于 ZnO 的压电能量收集器在 NO 2 存在下进行电压增强。我们使用了垂直集成的纳米线发生器（VING）结构。X 射线衍射图显示 ZnO 纳米线的生长方向是从基板沿 c 轴。ZnO 纳米线通过水热途径在氧化铟锡涂层的聚对苯二甲酸乙二醇酯基底上生长。通过扫描电子显微镜图像检查了表面形态，发现 ZnO 纳米线的直径约为 100 nm。VING 通过施加约 50 nN 的微小外力产生压电电压。picoscope 5204 正在测量周期性输出电压峰值。VING 通过施加约 50 nN 的微小外力产生压电电压。picoscope 5204 正在测量周期性输出电压峰值。VING 通过施加约 50 nN 的微小外力产生压电电压。picoscope 5204 正在测量周期性输出电压峰值。