Graphene spray and ...

an incorrect answer as sputtering is for conducting materials, like metals

people have tried it and other vapor deposition methods on graphene but only in the lab and it damages the graphene

but check back every decade or so and see ...

graphene is just the newest buzzword for trolls to use on the technically inastute victims

http://www.nature.com/articles/srep13523

there are many more in the scientific literature

there are dozens

try a search for "2D heterostructures" and see what pops up