{TAIL ~ An article} 1, wherein the layer comprises {HEAD ~ more than about 70% sp3 carbon carbon bonds} 
{ TAIL ~ An article } 1 , wherein the layer comprises { HEAD ~ more than about 70 % sp3 carbon carbon bonds }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD