Abstract
Porous materials with well-defined porosity have advantages in a wide range of applications, including filtration media, catalysis, and electrodes. The bottom-up fabrication of inverse opals have promised to provide those nanostructures, but fabrication of these materials is often plagued with large numbers of defects and macro-scale cracks. Here, we present a method for making nanostructured porous clay films with well defined pore size that are crack free over a large area (multiple cm2).
Highlights
Porous materials with well-defined porosity have advantages in a wide range of applications, including filtration media, catalysis, and electrodes
The bottom-up fabrication of inverse opals have promised to provide those nanostructures, but fabrication of these materials is often plagued with large numbers of defects and macro-scale cracks
We present a method for making nanostructured porous clay films with well defined pore size that are crack free over a large area
Summary
Porous materials with well-defined porosity have advantages in a wide range of applications, including filtration media, catalysis, and electrodes. One of the challenges associated with bottom up assembly, that has prevented this from becoming a reality, is that these types of self-assembled structures tend to have increasing amounts of uncontrolled defects as the size of the assembly increases.[11,12] One problem associated with ordered lms from colloidal particles is that as the lms dry cracks form,[12] which limits the ability to fabricate large area or very thick photonic crystals or similar materials for other applications, such as integrated optics.
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