Abstract
ABSTRACTThe deposition of TiO2-P25 on Pyrex glass is studied in order to propose a procedure for obtaining uniform and adherent thin films with a controlled thickness in the range between fractions of micrometer to a few tens of micrometers. Different deposition methods such as spray-coating, dip-coating, and drop-coating of liquid suspensions of TiO2-P25 powder are considered. The effects of pretreatment of the glass support, as well as postdeposition steps such as drying condition and thermal treatment, are also reported. A basic glass pretreatment and an acidic TiO2 suspension are chosen for an optimized adherence of the film. Drop-coating, associated with a slow drying under 55% relative humidity and a high-temperature thermal treatment is the method of choice to prepare coated glass slides in a large range of film thicknesses.
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