I want to fabricate a highly-ordered mesoporous ceria thin film ( T= 100nm, pore size 5-10nm) on a porous substrate ( pore size 8um). Because most fabrication methods have prepared mesoporous ceria on dense substrate (silicon wafer or glass), so I am wondering any possible methods to prepare a highly-ordered mesoporous ceria thin film on surface of a porous substrate. Thanks for any suggestions.