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