Low concentration gas detection, rapid response time and low working temperature are anticipated for a varied range of toxic gas detection applications. Conversely, the existing gas sensors suffer mostly from a high working temperature along with a slow response at low concentrations of analytes. Here, we report an ultrasensitive flexible nanostructured Zn_(x)Fe_(1−x)2O₄ (x = 0.1, 0.5 and 0.9) based chemiresistive sensor for nitrogen dioxide (NO₂) detection. We evince that the prepared flexible sensor Zn_(0.5)Fe_(0.5)2O₄ has detection potential as low as 5 ppm at a working temperature of 90 °C in a short phase. Further, the Zn_(0.5)Fe_(0.5)2O₄ sensor exhibits excellent selectivity, stability and repeatability. The optimized sensor sensing characteristics can be helpful in tremendous development of foldable mobile devices for environmental monitoring, protection and control.

中文翻译：

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基于纳米结构 Zn(x)Fe(1−x)2O4 的柔性超灵敏电阻 NO2 气体传感器

预计低浓度气体检测、快速响应时间和低工作温度可用于各种有毒气体检测应用。相反，现有的气体传感器大多遭受高工作温度以及在低浓度分析物下响应缓慢的问题。在这里，我们报告了一种基于超灵敏柔性纳米结构 Zn _{( x )} Fe _{(1− x )2} O ₄ ( x = 0.1, 0.5 和 0.9) 的化学电阻传感器，用于二氧化氮 (NO ₂ ) 检测。我们证明所制备的柔性传感器 Zn _(0.5) Fe _(0.5)2 O ₄在 90 °C 的工作温度下的短相检测电位低至 5 ppm。此外，Zn _(0.5) Fe _(0.5)2 O ₄传感器表现出优异的选择性、稳定性和可重复性。优化的传感器传感特性有助于可折叠移动设备的巨大发展，用于环境监测、保护和控制。