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