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We propose a new mechanism to create self-assembled porous media with highlytunable geometrical properties and permeabilities: We first allow aparticle-stabilized emulsion to form from a mixture of two fluids and colloidalparticles. Then, either one fluid phase or the particle layer is solidified,which can be achieved by techniques such as polymerization or freezing. Basedon computer simulations we demonstrate that modifying only the particlewettability or concentration results in porous structures with a wide range ofpore sizes and a permeability that can be varied by up to three orders ofmagnitude. We then discuss optimization of these properties for self-assembledfilters or reactors and conclude that structures based on so-called "bijels"are most suitable candidates.

Self-assembled porous media from particle-stabilized emulsions