Abstract
Microporous ceria thin films having nanocrystallites network were synthesized by evaporation-induced self-assemblyprocess, using P123 amphiphilic copolymer as structure-directing agent. The impact of key experimental parameters,i.e., the sol ageing, the relative humidity (RH), the thermal treatment, on the thin layer elaboration were investigated.The results show that the organization of the nanoparticles is possible for a sol ageing time lower than 16 days and thatthe size of the mesophase within the thin layer increases with the relative humidity fixed during the film deposition.Finally, an increase of the thermal treatment temperature from 300 to 1000 °C leads to the formation of fluorite-likedioxide material coupled with a loss of nanocrystallites organization and porosity due to the increase of the size of thecrystallites. This loss of nanocrystallites organization is more drastic in the direction perpendicular to the surface andless pronounced along the surface. Thus, a compromise between the crystallization and the preservation of the porosityneeds to be found.