【作者】 孙鹏； 周鑫； 王琛； 李晓伟； 刘江洋； 卢革宇；

【Author】 Peng Sun;Xin Zhou;Chen Wang;Xiaowei Li;Jiangyang Liu;Geyu Lu;College of Electronic Science and Engineering,Jilin University,State Key Laboratory on Integrated Optoelectronics;

【机构】 吉林大学电子科学与工程学院集成光电子国家重点实验室吉林大学实验区；

【摘要】 鉴于气体传感器在有毒、有害、易燃易爆气体检测方面的重要作用,使得开发出具有高灵敏度,低检测下限,良好选择性和长期稳定性的传感器具有重要的科研和实际应用意义。然而,到目前为止,作为气体传感领域研究热点的金属氧化物半导体传感器件在以上方面依旧存在着不足或缺陷。针对这些问题,我们以提高传感器灵敏度,选择性和降低检测检测下限为目标,通过结构增感和改性增感的方式,构筑了不同分等级结构的氧化物半导体异质结构复合物(如海胆状Sn O2/α-Fe2O3,双壳层Zn O/Zn Fe2O3微球,花状Ni O/α-Fe2O3中空球等)。随后的气敏特性测试结果表明这些异质结构氧化物复合物较单一氧化物表现出了更为优异的气敏特性(如更高的灵敏度,更快的响应速度等),这主要可归因于其独特的微观结构,及基本构成单元之间的协同作用。更多还原

【Abstract】 Developing gas sensors with high sensitivity,low detection limit,excellent selectivity and long-term stability becomes increasingly meaningful on account of the positive role they may play in the detection of toxic,harmful,flammable and explosive gases.However,up to now,as hot topic in the gas sensing field,metal oxides based sensor devices still have many deficiencies in these aspects.Aiming at these problems,we proposed structural and modificatory sensitization approaches via preparing various hierarchical metal oxides heterostructures(for instance,urchin-like Sn O2/α-Fe2O3,double-shelled Zn O/Zn Fe2O3 microspheres,flower-like Ni O/α-Fe2O3 hollow spheres,et.al) to the construction of high performances gas sensors with enhanced sensitivity,selectivity,as well as lowered detection limit.The subsequent gas sensing measurements explicitly revealed that these heterostructures manifested superior sensing behaviors that that of their primary building counterparts(like much higher sensitivity and faster response speed),which can be ascribed to the novel architectures and the synergistic effects.更多还原