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Strain-regulated sensing properties of α-Fe_(2)O_(3) nano-cylinders with atomic carbon layers for ethanol detection

Journal of Materials Science & Technology 2021年第9期68卷 132-139页

作者： Huajing Xiong Jianan Fu Jinyao Li Rashad Ali Hong Wang Yifan Liu Hua Su Yuanxun Li Woon-Ming Lau Nasir Mahmood Chunhong Mu Xian Jian School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Institute of Chemistry National Institute of Measurement and Testing Technology of ChinaChengdu 610021China School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Jiangxi Guo Chuang Industrial Park Development Co. LtdGanzhou 341000China Institute of Fundamental and Frontier Science University of Electronic Science and Technology of ChinaChengdu 610054China School of Engineering RMIT University124 La Trobe Street3001 MelbourneVictoriaAustralia National Engineering Research Center of Electromagnetic Radiation Control Materials State Key Laboratory of Electronic Thin Films and Integrated DevicesUniversity of Electronic Science and Technology of ChinaChengdu 611731China

The sensitivity of ethanol sensor is of paramount importance in a variety of areas,including chemical production with ethanol,alcohol testing for driving safety,***,α-Fe_(2)O_(3) nano-cylinders with atomic carbon layers are synthesized,for the first time,through in-situ catalytic chemical vapor deposition combined with hydrothermal techniques for the detection of *** reported α-Fe_(2)O_(3)@C nano-cylinders with double surficial strain effects deliver an ethanol detection sensitivity of 8 times as compared with α-Fe_(2)O_(3) nano-cylinders,10 times higher as compared with its detection sensitivity to ammonia,para-xylene,methanol and *** sensor also exhibits over-14-day operation stability and the minimum detection limit of 10 *** our best knowledge,the performances surpass those of previously reported α-Fe_(2)O_(3).Such attractive performances are attributed to the enhanced charge transfer in α-Fe_(2)O_(3) owing to the double surficial strain effects of α-Fe_(2)O_(3)@C nano-cylinders and the efficient adsorption of ethanol with atomic carbon layers.

关键词： Gas sensor nano-cylinder Hybrid microstructure Sensitivity Carbon coating

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