检出限
材料科学
薄膜
响应时间
选择性
灵敏度(控制系统)
酞菁
钴
线性关系
分析化学(期刊)
光电子学
纳米技术
化学
色谱法
计算机科学
电子工程
有机化学
工程类
冶金
催化作用
计算机图形学(图像)
统计
数学
作者
Qiang Liu,Lei Gao,Xingsong Su,Fei Zhou,Guotao Duan
标识
DOI:10.1016/j.matchemphys.2019.05.029
摘要
The cobalt phthalocyanine (CoPc) resistance-type sensors to NO2 were prepared using CoPc thin films via interfacial self-assembly method. Their sensing performances were investigated with respect to different NO2 concentrations from 1 to 50 ppm. It was found that the CoPc sensors show excellent sensing performance: relatively low temperature (115 °C), high sensitivity (2.7–10 ppm NO2 with a detection limit of 1 ppm), fast response and recovery (response time ∼26 s and recovery time ∼34 s at 3 ppm of NO2), and excellent stability (almost the same after 4 weeks), reliability and selectivity towards NO2. Further, the sensitivity showed a quasi-linear relationship versus the concentration of NO2 in the ranges of 1–50 ppm. On account of their high performances, the prepared CoPc thin films via interfacial self-assembly method will provide a high-efficiency sensor for practical NO2 sensing applications.
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