The photocrosslinking can use {HEAD ~ a sensitizer} and {TAIL ~ exposure} to light to achieve crosslinking 
The photocrosslinking can use { HEAD ~ a sensitizer } and { TAIL ~ exposure } to light to achieve crosslinking
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH