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中文摘要：
传统金属氧化物气敏材料因其灵敏度低、选择性差、工作温度高等缺点已很难满足高性能气敏元件的要求,而纳米气敏材料具有高的比表面积,可显著改善材料的气敏特性.文中采用简单的电热板在330~430℃、空气气氛下、一步法成功制备出了具有良好单斜晶体结构的CuO纳米线,平均直径为20~30 nm,长度可达1~5μm;CuO纳米线气敏元件在100×10-6乙醇气氛中的最佳工作温度约为260℃,其灵敏度分别为1.36和1.64,恢复和响应时间均小于5 s.
英文摘要：
It is difficult for the traditional metal oxide gas-sensing materials to meet the high performance gas-sensing devices requirement due to the low sensitivity,poor selectivity and high working temperature.Nano-sized material with a high specific surface area can improve gas-sensing properties notably.Herein,sin gle crystalline CuO nanowires with an average 20~30 nm in diameters,1~5 μm in length are obtained by thermal oxidation copper powders at 330 and 430 ° C in air condition.The optimum working temperature of the sensors based on as-prepared CuO nanowires is about 260 °C in 100 ppm ethanol,with the sensitivity of 1.36 and 1.64 respectively.Both the response and recovery time are less than 5 s.
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