CAJ | 학술논문

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.
전통금속양화물기민재료인기령민도저、선택성차、공작온도고등결점이흔난만족고성능기민원건적요구，이납미기민재료구유고적비표면적，가현저개선재료적기민특성.문중채용간단적전열판재330~430℃、공기기분하、일보법성공제비출료구유량호단사정체결구적CuO납미선，평균직경위20~30 nm，장도가체1~5μm；CuO납미선기민원건재100×10-6을순기분중적최가공작온도약위260℃，기령민도분별위1.36화1.64，회복화향응시간균소우5 s.
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 ther-mal 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.