Han Maeum, Jung Soonyoung, Lee Yeonsu, Jung Daewoong, Kong Seong Ho
School of Electronic and Electrical Engineering, Kyungpook National University, Daegu 41566, Korea.
Advanced Mechatronics R&D Group, Korea Institute of Industrial Technology (KITECH), Yeongcheon 38822, Korea.
Micromachines (Basel). 2021 Aug 30;12(9):1053. doi: 10.3390/mi12091053.
In this study, a polyethyleneimine (PEI)-functionalized carbon nanotube (CNT) sensor was fabricated for carbon dioxide detection at room temperature. Uniform CNT thin films prepared using a filtration method were used as resistive networks. PEI, which contains amino groups, can effectively react with CO gas by forming carbamates at room temperatures. The morphology of the sensor was observed, and the properties were analyzed by scanning electron microscope (SEM), Raman spectroscopy, and fourier transform infrared (FT-IR) spectroscopy. When exposed to CO gas, the fabricated sensor exhibited better sensitivity than the pristine CNT sensor at room temperature. Both the repeatability and selectivity of the sensor were studied.
在本研究中，制备了一种聚乙烯亚胺（PEI）功能化的碳纳米管（CNT）传感器，用于室温下的二氧化碳检测。使用过滤法制备的均匀CNT薄膜用作电阻网络。含有氨基的PEI在室温下可通过形成氨基甲酸盐与CO气体有效反应。通过扫描电子显微镜（SEM）、拉曼光谱和傅里叶变换红外（FT-IR）光谱观察传感器的形态并分析其性能。当暴露于CO气体时，所制备的传感器在室温下表现出比原始CNT传感器更好的灵敏度。研究了该传感器的重复性和选择性。
