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首页> 外文期刊>Applied Surface Science >Highly sensitive and selective room-temperature NO2 gas sensor based on bilayer transferred chemical vapor deposited graphene
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Highly sensitive and selective room-temperature NO2 gas sensor based on bilayer transferred chemical vapor deposited graphene

机译：基于双层转移化学气相沉积石墨烯的高灵敏度，选择性室温NO2气体传感器

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This work presents a highly sensitive room-temperature gas sensor based on bilayer graphene fabricated by an interfacial transfer of chemical vapor deposited graphene onto nickel interdigitated electrodes. Scanning electron microscopic and Raman spectroscopic characterizations confirm the presence of graphene on interdigitated nickel electrodes with varying numbers of graphene layers. The NO2 detection performances of bilayer graphene gas sensor have been investigated in comparison with those of monolayer and multilayer graphene gas sensors at room temperature. From results, the bilayer graphene gas sensor exhibits higher response, sensitivity and selectivity to NO2 than monolayer and multilayer graphene. The sensitivity of bilayer graphene gas sensor is 1.409 ppm(-1) towards NO2 over a concentration range of 1-25 ppm, which is more than twice higher than that of monolayer graphene. The NO2-sensing mechanism of graphene sensing film has been explained based on the direct charge transfer process due to the adsorption of NO2 molecules. (C) 2017 Elsevier B.V. All rights reserved.
机译：这项工作提出了一种基于双层石墨烯的高灵敏度室温气体传感器，该传感器是通过将化学气相沉积的石墨烯界面转移到镍叉指电极上而制成的。扫描电子显微镜和拉曼光谱表征证实了在具有不同数目的石墨烯层的叉指镍电极上存在石墨烯。与室温下的单层和多层石墨烯气体传感器相比，研究了双层石墨烯气体传感器的NO2检测性能。从结果来看，双层石墨烯气体传感器比单层和多层石墨烯表现出更高的对NO2的响应，灵敏度和选择性。双层石墨烯气体传感器在1-25 ppm的浓度范围内对NO2的灵敏度为1.409 ppm（-1），比单层石墨烯的灵敏度高两倍以上。基于NO 2分子的吸附，基于直接电荷转移过程已经解释了石墨烯传感膜的NO 2传感机理。 （C）2017 Elsevier B.V.保留所有权利。

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