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Hydrogen Gas Sensing Characteristics of ZnO Wire-like Thin Films

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  • URLhttps://db.koreascholar.com/Article/Detail/296997
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한국재료학회지 (Korean Journal of Materials Research)
한국재료학회 (Materials Research Society Of Korea)
초록

ZnO wire-like thin films were synthesized through thermal oxidation of sputtered Zn metal films in dry air. Their nanostructure was confirmed by SEM, revealing a wire-like structure with a width of less than 100 nm and a length of several microns. The gas sensors using ZnO wire-like films were found to exhibit excellent H2 gas sensing properties. In particular, the observed high sensitivity and fast response to H2 gas at a comparatively low temperature of 200˚C would lead to a reduction in the optimal operating temperature of ZnO-based H2 gas sensors. These features, together with the simple synthesis process, demonstrate that ZnO wire-like films are promising for fabrication of low-cost and high-performance H2 gas sensors operable at low temperatures. The relationship between the sensor sensitivity and H2 gas concentration suggests that the adsorbed oxygen species at the surface is O-.

저자
  • 웬래훙 | Nguyen, Le Hung
  • 안은성 | 안은성
  • 박성용 | 박성용
  • 정훈철 | 정훈철
  • 김효진 | 김효진
  • 김도진 | 김도진