High response and selectivity of a Cu-ZnO nanowire nanogenerator as a self-powered/active H2S sensor
High response and selectivity of a Cu-ZnO nanowire nanogenerator as a self-powered/active H2S sensor
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DOI：
10.1039/c4cp04983g
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发表时间：
2015-01-01
影响因子：
3.3
通讯作者：
Xue, Xinyu
中科院分区：
文献类型：
--
作者：
Fu, Yongming;Zhao, Yayu;Xue, Xinyu
利用铜-氧化锌纳米线发电机实现了高响应、高选择性的室温自供电硫化氢传感。当室温下暴露在1000ppm的硫化氢中时，该器件(5at%铜-氧化锌)在压缩压力下的输出电压从0.552(干燥空气中)下降到0.049 V，响应高达1045，是未掺杂的氧化锌纳米线的8倍以上。常温下对H_2S的选择性也很高。这种增强的室温硫化氢传感性能可以归因于氧化锌纳米线的压电屏蔽效应和铜掺杂的协同效应的耦合。这项研究应该会促进设计一种新的气体传感器的研究，这种传感器可以在室温下检测有毒气体。
Room-temperature self-powered H2S sensing with high response and selectivity has been realized from a Cu-ZnO nanowire nanogenerator. Upon exposure to 1000 ppm H2S at room temperature, the piezoelectric output voltage of the device (5 at% Cu-ZnO) under compressive force decreases from 0.552 (in dry air) to 0.049 V, and the response is up to 1045, over 8 times larger than that of undoped ZnO nanowires. The selectivity against H2S is also very high at room temperature. The enhanced room-temperature H2S sensing performance can be attributed to the coupling of the piezoelectric screening effect of ZnO nanowires and the synergistic effect of the Cu dopant. This study should stimulate research into designing a new gas sensor for detecting toxic gases at room temperature.