What do your skin, the clothes you wear, and the soil you stand on have in common? They are all porous substances. Like a sponge, their surfaces are covered with tiny holes that allow liquids and gasses to pass through. Porous materials are widespread throughout our world, and those with nanoscale pores—called mesoporous materials—make up everything from chemical catalyst supports to gas storage chambers and separation membranes.

Via:: https://phys.org/news/2017-12-nanoscientists-material-pores.html

Nanoscientists develop new material with controllable pores

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