A method 2, wherein {HEAD ~ the chemical bonding} is induced by {TAIL ~ ultraviolet irradiation} 
is induced by
A method 2 , wherein { HEAD ~ the chemical bonding } is induced by { TAIL ~ ultraviolet irradiation }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL