Functionalized-graphene sensor on the hydrophobic surface for the selective detection of ppb-level volatile organic compounds (VOCs)

我们制作了CVD石墨烯带（GNR）和沸石功能化的石墨烯基FET气体传感器。实验过程展示了石墨烯在特定气体环境中的电阻差异。沸石功能化的GNR FET对丙酮气体分子的灵敏度为100 ppb。我们已经确定，沸石作为一种捕获材料，以提高气敏响应。利用栅极调制技术研究了这种电荷转移对所施加的调谐电压的依赖关系。

We have fabricated a CVD graphene ribbon (GNR) and Zeolite functionalised graphene-based FET gas sensor. The experimental procedure demonstrates the difference in the resistance of graphene in a particular gas environment. The zeolite functionalised GNR FET showed a sensitivity of 100 ppb towards acetone gas molecules. We have identified that zeolite act as a trapping material to enhance the gas-sensing response. The dependence of this charge transfer on the applied tuning voltage was investigated using the gate modulation technique.