coating said substrate with {HEAD ~ a solution} formed from a soluble source of silicon oxide, water, a solvent, a nonionic surfactant, {TAIL ~ an ionic additive}, and an acid catalyst; and 
coating said substrate with { HEAD ~ a solution } formed from a soluble source of silicon oxide , water , a solvent , a nonionic surfactant , { TAIL ~ an ionic additive } , and an acid catalyst ; and
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH