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Abstract：
We discuss the implementation challenges of gas sensing systems based on low-frequency noise measurements on chemoresistive sensors. Resistance fluctuations in various gas sensing materials, in a frequency range typically up to a few kHz, can enhance gas sensing by considering its intensity and the slope of power spectral density. The issues of low-frequency noise measurements in resistive gas sensors, specifically in two-dimensional materials exhibiting gas-sensing properties, are considered. We present measurement setups and noise-processing methods for gas detection. The chemoresistive sensors show various DC resistances requiring different flicker noise measurement approaches. Separate noise measurement setups are used for resistances up to a few hundred kΩ and for resistances with much higher values. Noise measurements in highly resistive materials (e.g., MoS2, WS2, and ZrS3) are prone to external interferences but can be modulated using temperature or light irradiation for enhanced sensing. Therefore, such materials are of considerable interest for gas sensing.
摘要：
我们讨论了基于化学电阻传感器上的低频噪声测量的气体传感系统的实施挑战。各种气体传感材料的电阻波动，在通常高达几kHz的频率范围内，可以通过考虑其强度和功率谱密度的斜率来增强气体传感。电阻式气体传感器中的低频噪声测量问题,特别是在具有气体传感特性的二维材料中，被考虑。我们介绍了气体检测的测量设置和噪声处理方法。化学电阻传感器示出了需要不同闪烁噪声测量方法的各种DC电阻。单独的噪声测量设置用于高达几百kΩ的电阻和具有高得多的值的电阻。高电阻材料中的噪声测量(例如，MoS2，WS2和ZrS3）易于受到外部干扰，但可以使用温度或光照射进行调制以增强感测。因此,这样的材料对于气体感测是相当感兴趣的。
