Graphene is {HEAD ~ a single atomic layer} of {TAIL ~ graphite} and as such is expected to be a zero gap semiconductor 
of
Graphene is { HEAD ~ a single atomic layer } of { TAIL ~ graphite } and as such is expected to be a zero gap semiconductor
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH