{TAIL ~ Various other photoinduced reactions} may be used in the third technique to bond {HEAD ~ the FLC molecules} to the alignment layer 
{ TAIL ~ Various other photoinduced reactions } may be used in the third technique to bond { HEAD ~ the FLC molecules } to the alignment layer
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH