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为分析酸处理过程对石英晶振型碳纳米管(CNTs)有机(VOCs)气体传感器灵敏度的影响,制作了一种多壁碳纳米管(MWCNTs)石英晶振式VOCs传感器.发现酸处理可以明显提高传感器灵敏度,利用毛细凝聚原理与开尔文公式对上述实验现象进行了分析.另外,比较了传感器对不同有机气体(甲苯、乙醇和丙酮)的灵敏度,研究结果表明传感器灵敏度与气体饱和蒸汽压有关,同样,该实验现象可利用毛细凝聚原理与开尔文公式来解释.
In order to analyze the effect of acid treatment on the sensitivity of quartz crystal-type carbon nanotubes (CNTs) organic gas sensors, a multi-walled carbon nanotube (MWCNTs) quartz crystal VOCs sensor was fabricated and found that acid treatment can significantly improve the sensor Sensitivity, the principle of capillary condensation and the Kelvin formula were used to analyze the above experimental phenomena.In addition, the sensitivities of the sensors to different organic gases (toluene, ethanol and acetone) were compared. The results show that the sensor sensitivity is related to the gas vapor saturation pressure, The experimental phenomenon can be explained by the principle of capillary condensation and the Kelvin formula.