Science Daily  March 7, 2022 Scientists have long tried to use graphene as a sieve. However, it doesn’t have any pores. An international team of researchers (Germany, USA – Yale University) found that bilayer silica composed of corner-sharing (SiO4) units to be permeable for small molecules due to its intrinsic lattice openings. Their study sheds light on the mass transport properties of freestanding 2D SiO2 upon using atomic layer deposition (ALD) to grow large-area films on Au/mica substrates followed by transfer onto Si3N4 windows. Permeation experiments with gaseous and vaporous substances revealed the suspended material to be porous, but the […]