In some cases, chemical crosslinking step can include treatment of {HEAD ~ a polyelectrolyte multilayer} with {TAIL ~ a carbodiimide reagent} 
In some cases , chemical crosslinking step can include treatment of { HEAD ~ a polyelectrolyte multilayer } with { TAIL ~ a carbodiimide reagent }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL