Fig. 1

Controlled growth of the WSe₂ at patterned graphene. a Schematic of the laterally stitched WSe₂-graphene synthesis. b Raman mapping for the G’ band of the graphene and c AFM image of the patterned growth of the WSe₂-graphene. d Raman spectra of the E_2g mode (WSe₂—blue) and the G’ band (graphene—green) in c. Raman mapping of e the E_2g mode of the WSe₂ and f the G’ band of the graphene in the monolayer heterojunction