Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Gas sensing properties of polyacrylonitrile/metal oxide nanofibrous mat prepared by electrospinning

  • Lee, Deuk-Yong (Department of Materials Engineering, Daelim College of Technology) ;
  • Cho, Jung-Eun (Department of Materials Engineering, Daelim College of Technology) ;
  • Kim, Ye-Na (Department of Materials Engineering, Daelim College of Technology) ;
  • Oh, Young-Jei (Thin Film Materials Research Center, Korea Institute of Science and Technology)
  • Published : 2008.07.31
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Abstract

Polyacrylonitrile(PAN)/metal oxide(MO) nanocomposite mats with a thickness of 0.12 mm were electrospun by adding 0 to 10 wt% of MO nanoparticles ($Fe_2O_3$, ZnO, $SnO_2$, $Sb_2O_3-SnO_2$) into PAN. Pt electrode was patterned on $Al_2O_3$ substrate by DC sputtering and then the PAN(/MO) mats on the Pt patterned $Al_2O_3$ were electrically wired to investigate the $CO_2$ gas sensing properties. As the MO content rose, the fiber diameter decreased due to the presence of lumps caused by the presence of MOs in the fiber. The PAN/2% ZnO mat revealed a faster response time of 93 s and a relatively short recovery of 54 s with a ${\Delta}R$ of 0.031 M${\Omega}$ at a $CO_2$ concentration of 200 ppm. The difference in sensitivity was not observed significantly for the PAN/MO fiber mats in the $CO_2$ concentration range of 100 to 500 ppm. It can be concluded that an appropriate amount of MO nanoparticles in the PAN backbone leads to improvement of the $CO_2$ gas sensing properties.

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References

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