Highly sensitive isoprene gas sensor using Au-loaded pyramid-shaped ZnO particles

Noriko Saito, Hajime Haneda, Ken Watanabe, Kengo Shimanoe, Isao Sakaguchi

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

Highly sensitive sensors to detect small amounts of gases are expected to be used for monitoring air quality and analyzing breath for medical diagnosis. We report a highly sensitive isoprene gas sensor using Au-loaded pyramid-shaped ZnO particles. The pyramid-shaped ZnO particles with (0001) base and {10 1¯1¯} six side surfaces were synthesized solvothermally. Loading of 0.5 % Au nanoparticles successfully increased the sensor response. The response value (the resistivity ratio in air and isoprene gas) to 50 ppb isoprene gas was 42 at 350 °C in dry air, which is remarkably higher than that of previously reported sensors of metal-oxide semiconductors. Under 80 % relative humidity, the response value to 50 ppb was 4.8. The isoprene concentration dependence of the sensor response implied that 10 ppb can be detected with a response value of 1.4 and that diagnosis of liver diseases and sleep state is possible. Enhanced selectivity compared to acetone, ethanol and hydrogen was confirmed in Au-doped samples.

本文言語英語
論文番号128999
ジャーナルSensors and Actuators, B: Chemical
326
DOI
出版ステータス出版済み - 1 1 2021

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 器械工学
  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

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