| 초록 |
2D atomic-layered materials such as graphene and transition metal dichalcogenides (TMDs) have attracted much attention as promising materials for chemical sensing devices owing to their large surface-to-volume ratios and extremely sensitive surfaces. In this presentation, we will discuss diverse considerations of 2D nanomaterials necessary for high performance chemical sensing applications: mechanism, heterostructure, performance enhancement, and device fabrication. First, we will introduce deep investigation about char transfer sensing mechanism of 2D TMDs, which was elucidated by both In situ photoluminescence characterization and theoretical calculations. Secondly, we will show unique 2D heterostructure designs based chemical sensor such as Graphene/MoS2 and NbSe2/WSe2 with NbxW1−xSe2 transition alloy junction. Thirdly, we will provide approaches to improve critical sensing performance including sensitivity, selectivity and stability through surface decoration of metal nanoparticles or substitutional doping of metallic atoms to 2D lattice. Lastly, we will suggest various device fabrication process using facile 2D material preparation methods and unique device architectures. These studies could pave a road toward futuristic gas-sensing platforms based on diverse 2D materials. |
