wherein {HEAD ~ the graphene} extending in a network form from {TAIL ~ the junction} is between the fine catalytic metal particles 
wherein { HEAD ~ the graphene } extending in a network form from { TAIL ~ the junction } is between the fine catalytic metal particles
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH