首页|Gas sensor array based on carbon-based thin-film transistor for selective detection of indoor harmful gases

Gas sensor array based on carbon-based thin-film transistor for selective detection of indoor harmful gases

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The identification of indoor harmful gases is imperative due to their significant threats to human health and safety.To achieve accurate identification,an effective strategy of constructing a sensor array combined with the pattern recognition algorithm is employed.Carbon-based thin-film transistors are selected as the sensor array unit,with semiconductor carbon nanotubes(CNTs)within the TFT channels modified with different metals(Au,Cu and Ti)for selective responses to NH3,H2S and HCHO,respectively.For accurate gas species identification,an identification mode that combines linear discriminant analysis algorithms and logistic regression classifier is developed.The test results demonstrate that by preprocessing the sensor array's sensing data with the LDA algorithm and subsequently employing the LR classifier for identification,a 100％recognition rate can be achieved for three target gases(NH3,H2S and HCHO).This work provides significant guidance for future applications of chip-level gas sensors in the realms of the Internet of Things and Artificial Intelligence.

Carbon-based thin-film transistorsGas sensor arraysSemiconductor carbon nanotubesMulti-gas detectionLinear discriminant analysis

Can Liu、Yu Sun、Jia-Yi Guo、Xiu-Lei Li、Lu Tao、Jin-Yong Hu、Jue-Xian Cao、Ping-Hua Tang、Yong Zhang

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School of Electrical and Information Engineering,Hunan Institute of Engineering,Xiangtan 411104,China

Physics and Optoelectronics & Hunan Institute of Advanced Sensing and Information Technology,Xiangtan University,Xiangtan 411105,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaHunan Provincial Natural Science Foundation of ChinaHunan Provincial Natural Science Foundation of Chinascience and technology innovation Program of Hunan Province

62071410621014772021JJ405422023JJ305962023RC3133

2024

10.1007/s12598-024-02776-9

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(9)
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