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- ItemCarboxylic acids and esters as scaffold for cavities in porous single layer anti-reflective coatings of silica-titania with excellent optical and mechanical properties(Wuhan : Scientific Research Publishing, 2014) Menezes, E.; König, Peter; Jilavi, Mohammad H.; Oliveira de, Peter W.; Alves Junior, S.Anti-reflective (AR) single layer of silica-titania (SiO2-TiO2) coatings were obtained from sols containing pyromellitic dianhydride (PMDA) derivatives and Ti and Si precursors on glass substrate by dip-coating method. The coatings showed very high optical quality and the transmission was improved to up to 98.5%. Furthermore, the coatings also presented good mechanical stability.