Preparation of CH3SiO3/2 film from methyltriethoxysilane

An oligomer solution was prepared from methyltriethoxysilane with HNO₃ catalyst. Aluninum acetylacetonate was introudced into the solution to eliminate crystalline precipitates (CH₃SiO_3/2)₈. Self-sustained film was attempted by dropping the solution onto an aqueous solution, into which NaCl was added to elevate the solution density. The film formation greatly depended both on the reaction time and on the supporting solution. The structure of the film thus obtained was investigated by FTIR attenuated total reflectance spectroscopy.