Gas sensors based on multiple-walled carbon nanotubes-polyethylene oxide films for toluene vapor detection
Gas sensors based on multiple-walled carbon nanotubes-polyethylene oxide films for toluene vapor detection
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基于多壁碳纳米管-聚环氧乙烷薄膜的气体传感器用于甲苯蒸气检测
DOI：
10.1016/j.snb.2013.09.079
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发表时间：
2014-02
期刊：
影响因子：
--
通讯作者：
Tai, Huiling
中科院分区：
文献类型：
--
作者：
Jiang, Yadong;Xie, Guangzhong;Du, Xiaosong;Tai, Huiling
本文研究了两种不同敏感膜结构的甲苯蒸气传感器，制备了多壁碳纳米管（MWCNTs）-聚氧化乙烯（PEO）复合膜和MWCNTs-PEO双层膜。这两种传感器都是通过在叉指电极（IDE）上喷涂敏感膜获得的。研究了两种传感器对室温下甲苯蒸气的响应性能。扫描电子显微镜（SEM）用于敏感膜的形貌分析。实验结果表明，双层膜传感器比复合膜传感器具有更高的灵敏度。两种传感器的响应和恢复时间均在8 s以内。此外，具有双层膜的传感器对甲苯蒸气表现出适度的选择性。研究了两种传感器的传感机理。
Two kinds of toluene vapor sensors with different sensitive film structures, i.e., multi-walled carbon nanotubes (MWCNTs)-polyethylene oxide (PEO) composite film and MWCNTs-PEO bilayer film were fabricated. Both sensors were obtained by airbrushing the sensitive films on interdigitated electrodes (IDE). Response performances of both sensors to toluene vapor at room temperature were investigated. Scanning electron microscope (SEM) was used for morphology analysis of the sensitive films. The experimental results showed that sensors with bilayer films revealed a larger sensitivity than that with the composite films. The response and recovery times of both sensors were within 8 s. Moreover, sensors with bilayer films exhibited a modest selectivity to toluene vapor. The sensing mechanisms of both sensors were studied as well.
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