{TAIL ~ Solvents} such as fluorosulfonic acid may also serve to generate {HEAD ~ the dopant} 
{ TAIL ~ Solvents } such as fluorosulfonic acid may also serve to generate { HEAD ~ the dopant }
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD