growing {TAIL ~ the plurality} of {HEAD ~ carbon nanotubes} from the at least one exposed portion of the semiconductor substrate 
growing { TAIL ~ the plurality } of { HEAD ~ carbon nanotubes } from the at least one exposed portion of the semiconductor substrate
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH