| 초록 |
Graphene is composed of only surface carbon atoms, which suggests that graphene can be an ideal material for gas sensing. However, graphene-based gas sensors suffer forms very slow and low response to gas molecules, and incomplete recovery at room temperature. In this presentation, we will show our recent studies on room temperature gas sensors based on self-heated graphene and functionalized graphene such as graphene oxide and fluorinated graphene. We reveal that surface functionalization which sensitizes graphene electronically and chemically sensitization is key in improving gas sensing properties of graphene-based materials. We emphasize the promising use of room temperature flexible transparent low-power consumption gas sensors based on functionalized graphene and self-activated graphene for mobile applications and next generation electronic nose. We also show that functionalized graphene can be used for chemoresistive taste sensors, which promises the potential use of graphene-based materials for next generation electronic tongue. Finally, we show that 2-dimensional transition metal disulfides such as MoS2 and WS2 are promising materials for chemoresistive gas sensors. |
