外延LaBaCo₂O₅.₅+δ薄膜的气敏特性
Gas Sensing Properties of Epitaxial LaBaCo2O5.5+δ Thin Films.
作者信息
Liu M, Ren S P, Zhang R Y, Xue Z Y, Ma C R, Yin M L, Xu X, Bao S Y, Chen C L
机构信息
Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education &International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
出版信息
Sci Rep. 2015 Jul 6;5:10784. doi: 10.1038/srep10784.
Chemical reactivity and stability of highly epitaxial mixed-conductive LaBaCo2O5.5+δ (LBCO) thin films on (001) LaAlO3 (LAO) single-crystalline substrates, fabricated by using pulsed laser deposition system, were systematically investigated. Microstructure studies from x-ray diffraction indicate that the films are c-axis oriented with the interface relationship of [100]LBCO//[100]LAO and (001)LBCO//(001)LAO. LBCO thin films can detect the ethanol vapor concentration as low as 10 ppm and the response of LBCO thin film to various ethanol vapor concentrations is very reliable and reproducible with the switch between air and ethanol vapor. Moreover, the fast response of the LBCO thin film, as the p-type gas sensor, is better than some n-type oxide semiconductor thin films and comparable with some nanorods and nanowires. These findings indicate that the LBCO thin films have great potential for the development of gas sensors in reducing/oxidizing environments.
利用脉冲激光沉积系统在（001）LaAlO3（LAO）单晶衬底上制备的高度外延混合导电LaBaCo2O5.5+δ（LBCO）薄膜的化学反应性和稳定性得到了系统研究。X射线衍射的微观结构研究表明，薄膜沿c轴取向，界面关系为[100]LBCO//[100]LAO和（001）LBCO//（001）LAO。LBCO薄膜能够检测低至10 ppm的乙醇蒸汽浓度，并且LBCO薄膜对各种乙醇蒸汽浓度的响应在空气和乙醇蒸汽之间切换时非常可靠且可重复。此外，作为p型气体传感器，LBCO薄膜的快速响应优于一些n型氧化物半导体薄膜，与一些纳米棒和纳米线相当。这些发现表明，LBCO薄膜在还原/氧化环境中的气体传感器开发方面具有巨大潜力。
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