The additive is {HEAD ~ either an ionic additive} or {TAIL ~ an amine additive} which forms an ionic ammonium type salt in the acidic precursor solution 
The additive is { HEAD ~ either an ionic additive } or { TAIL ~ an amine additive } which forms an ionic ammonium type salt in the acidic precursor solution
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH