人工晶体学报2012，Vol.41Issue(5)：1313-1317,5.
乙醇气体的浓度对氧化锌纳米棒气敏元件电学性能的影响
Effect of Ethanol Gas Concentration on Electrical Properties of Gas Sensor Based on ZnO Nanorods
摘要
Abstract
Zn ( NO3) 2 and NaOH were used as the raw material to prepare ZnO nanorods through a hydrothermal technique. The crystal quality and morphology of the prepared ZnO nanorods were characterized by X-ray diffraction ( XRD) and field emission scanning electron microscope ( FESEM). Gas sensors were made by tabletting the ZnO nanorods and their gas sensitivities were measured. The electrical resistance, capacitance and impedance of the sensor were investigated at room temperature (23℃) when exposed to air and ethanol gas of different concentrations. When the sensor was transferred from air to 20 ppm ethanol in air the electrical resistance decreased by 68%. At low frequency ( < 10 Hz) , capacitance increases with the increase in ethanol concentration, while impedance decrease with increase. At high frequency ranging from 104 Hz to 106 Hz, capacitance and impedance changes of the sensor are negligible. A large capacitance and impedance changes can be obtained at 100 Hz, the capacitance increased by 98% and the impedance decreased by 33%.关键词
氧化锌纳米棒/气敏性能/电容/阻抗Key words
ZnO nanorods/ gas sensing properties/ capacitance/ impedance分类
化学化工引用本文复制引用
周小岩,黄柳宾,李传勇,刘晓龙..乙醇气体的浓度对氧化锌纳米棒气敏元件电学性能的影响[J].人工晶体学报,2012,41(5):1313-1317,5.基金项目
山东省自然科学基金(ZR2011AL023) （ZR2011AL023）
中国石油大学(华东)校自主创新项目(11CX0406A) （华东）
大学生创新训练计划(20121165) （20121165）
