Exciton Diffusion in a Monolayer MoS2-WS2 Lateral Heterostructure

In this paper, we observed preliminary exciton diffusion signature in a WS
2
-MoS
2
lateral heterostructure at room temperature. Within center MoS
2
the diffusion appears to be 300 nm, along the WS
2
-MoS
2
edge the diffusion appears to be more than $2\ \mu\text{m}$.