 stopping the depositing of Al when {HEAD ~ sufficient atoms} of Al have been deposited to form {TAIL ~ the desired Al monolayer} 
deposited to form
stopping the depositing of Al when { HEAD ~ sufficient atoms } of Al have been deposited to form { TAIL ~ the desired Al monolayer }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL