A chemical crosslinking step can be preferred when the polyelectrolyte multilayer is formed on {HEAD ~ a substrate} that is unstable at {TAIL ~ temperatures} required for crosslinking  
A chemical crosslinking step can be preferred when the polyelectrolyte multilayer is formed on { HEAD ~ a substrate } that is unstable at { TAIL ~ temperatures } required for crosslinking
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH