The hydrophilic or superhydrophilic regions can selective collect {TAIL ~ water} on {HEAD ~ the surface} 
The hydrophilic or superhydrophilic regions can selective collect { TAIL ~ water } on { HEAD ~ the surface }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD