单丝和毡状碳纳米管化学传感器的不同传感机理
Different sensing mechanisms in single wire and mat carbon nanotubes chemical sensors
摘要：
比较了由相同碳纳米管（CNT）材料制成的单线和垫形式传感器结构的化学传感特性。碳纳米管传感器的传感性能进行了评估后，在五个蒸汽作为丙酮，乙酸，乙醇，甲苯和水的存在下的电响应。发现单线CNT传感器的不同行为，而垫结构对所有施加的蒸气显示出类似的响应。这表明，随机CNT网络的传感机制不能被解释为构成单个CNT效应的简单求和，而是与另一个鲁棒的现象相关联，必须假设该现象可能位于CNT-CNT结处。
英文摘要：
Chemical sensing properties of single wire and mat form sensor structures fabricated from the same carbon nanotube (CNT) materials have been compared. Sensing properties of CNT sensors were evaluated upon electrical response in the presence of five vapours as acetone, acetic acid, ethanol, toluene, and water. Diverse behaviour of single wire CNT sensors was found, while the mat structures showed similar response for all the applied vapours. This indicates that the sensing mechanism of random CNT networks cannot be interpreted as a simple summation of the constituting individual CNT effects, but is associated to another robust phenomenon, localized presumably at CNT-CNT junctions, must be supposed.
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