In this research, we combined printed electrodes and a flexible substrate to develop a low-cost, resistive, gas sensor with small energy consumption. The ability to measure a gas is derived from an analysis of the resistance change resulting from gas molecules adsorbed by a polymer. With the sensor array coated with various polymers, we can identify the gas type and its concentration. Eight combinations of electrode with different width and gap were designed. The electrodes were printed on PET substrates with silver ink. Sensing material developed with mixture of Polyvinylpyrrolidone (PNVP), Carbon Black (CB) and solvent ethylene glycol (EG) was then coated on the sensors and tested with ethanol and methane. The layout design of the width and gap with the greatest sensitivity towards gases is 20 μ m/20 μ m. The limit of detection (LOD) is 40 ppm for ethanol and 36 ppm for methane; the resistance changes of the two gases are apparently opposite. Besides this, sensors ...

中文翻译：

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印刷电阻传感器阵列与柔性基板相结合，用于乙醇和甲烷检测

在这项研究中，我们结合了印刷电极和柔性基板，以开发一种能耗低的低成本，电阻式气体传感器。测量气体的能力源自对聚合物吸附的气体分子引起的电阻变化的分析。传感器阵列涂有各种聚合物，我们就可以识别出气体类型及其浓度。设计了八种不同宽度和间隙的电极组合。用银墨水将电极印刷在PET基板上。然后将由聚乙烯吡咯烷酮（PNVP），炭黑（CB）和溶剂乙二醇（EG）的混合物制成的传感材料涂在传感器上，并用乙醇和甲烷进行测试。对气体最敏感的宽度和间隙的布局设计为20μm / 20μm。乙醇的检出限（LOD）为40 ppm，甲烷的检出限为36 ppm；两种气体的电阻变化显然相反。除此之外，传感器...