Improved NO2 Gas Sensing Properties of Graphene Oxide Reduced by Two-beam-laser Interference

Note: This report on the fabrication of a NO2 gas sensor from room-temperature reduction of graphene oxide (GO) was published in Nature on March 20, 2018.

Li GuoYa-Wei HaoPei-Long LiJiang-Feng SongRui-Zhu YangXiu-Yan FuSheng-Yi XieJing Zhao & Yong-Lai Zhang

Nitrogen dioxide (NO2), mainly released by automotive emissions and combustion of conventional fossil fuels, is one of the common air pollutants and can also threaten the health of human beings, because it could bring several serious diseases even at low concentrations. Therefore, the development of high performance gas sensor to detect the gas of NO2 in an economic way is crucially important, for not only health protection but also environmental applications.

Since the ability to detect individual gas molecules by graphene was demonstrated, considerable numbers of research activities have been ignited for graphene-based gas sensors, including flexible gas sensors for wearable sensing applications, and NO2 detecting sensors, because graphene and its derivatives exhibit great electronic conductivity, flexibility, low noise and good thermal stability, it has been generally considered as a promising gas-sensing material for various highly sensitive detections.

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