{HEAD ~ Light} can be applied through a mask to {TAIL ~ the graphene layer}, where the mask includes a pattern 
{ HEAD ~ Light } can be applied through a mask to { TAIL ~ the graphene layer } , where the mask includes a pattern
HEAD HEAD HEAD HEAD HEAD OTH OTH REL OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH