Multifunctional, Multilayer, Multiscale: Integrative Synthesis of Complex Macroporous and Mesoporous Thin Films with Spatial Separation of Porosity and Function

PAULA C. ANGELOMÉ; M. CECILIA FUERTES; GALO J. A. A. SOLER-ILLIA

ADVANCED MATERIALS

WILEY-V C H VERLAG GMBH

Año: 2006 vol. 18 p. 2397 - 2402

0935-9648

In this work, we present the construction of multilayered stacks of mesoporous and macroporous–mesoporous thin films by using evaporation-induced self-assembly (EISA). We have been able to integrate surfactant-templated mesoporous films with macroporous films obtained by controlled phase separation. We use these macroporous films as exotemplates to obtain porous thin films with mesoscopic and macroscopic structure. The organization of these films on the mesoscopic and macroscopic (i.e., micrometer) scale is conserved and there is no major change in structure when the films are deposited on thin films with a different meso- or macrostructure. By appropriately controlling the pre- and postsynthesis treatments (thermal treatment, selective grafting, consolidation, etching, etc.), we have been able to generate thin films with varying porosities and organic functionalities precisely located along the film thickness. We have been able to integrate surfactant-templated mesoporous films with macroporous films obtained by controlled phase separation. We use these macroporous films as exotemplates to obtain porous thin films with mesoscopic and macroscopic structure. The organization of these films on the mesoscopic and macroscopic (i.e., micrometer) scale is conserved and there is no major change in structure when the films are deposited on thin films with a different meso- or macrostructure. By appropriately controlling the pre- and postsynthesis treatments (thermal treatment, selective grafting, consolidation, etching, etc.), we have been able to generate thin films with varying porosities and organic functionalities precisely located along the film thickness.