Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Trimethylamine Sensing Characteristics of Molybdenum doped ZnO Hollow Nanofibers Prepared by Electrospinning

전기방사방법에 의해 합성된 ZnO 중공 나노섬유의 trimethylamine 가스 감응 특성

  • Kim, Bo-Young (Department of Materials Science and Engineering, Korea University) ;
  • Yoon, Ji-Wook (Department of Materials Science and Engineering, Korea University) ;
  • Lee, Chul-Soon (Department of Materials Science and Engineering, Korea University) ;
  • Park, Joon-Shik (Smart Convergence Sensor Research Center, Korea Electronic Technology Institute (KETI)) ;
  • Lee, Jong-Heun (Department of Materials Science and Engineering, Korea University)
  • Received : 2015.08.12
  • Accepted : 2015.11.26
  • Published : 2015.11.30
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Abstract

Pure and Mo-doped ZnO hollow nanofibers were prepared by single capillary electrospinning and their gas sensing characteristics toward 5 ppm ethanol, trimethylamine (TMA), CO and $H_2$ were investigated. The gas responses and responding kinetics were dependent upon sensing temperature and Mo doping. Mo-doped ZnO hollow nanofibers showed high response to 5 ppm TMA ($R_a/R_g=111.7$, $R_a$: resistance in air, $R_g$: resistance in gas) at $400^{\circ}C$, while the responses of pure ZnO hollow nanofibers was low ($R_a/R_g=47.1$). In addition, the doping of Mo enhanced selectivity toward TMA. The enhancement of gas response and selectivity to TMA by Mo doping to ZnO nanofibers was discussed in relation to the interaction between basic analyte gas and acidic additive materials.

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