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