Following this design principle, the researchers create angstrom-scale pores in bi-layer graphene sheets, and decorate the two pore edges with twisted rings of carbonyl groups. The artificial ion ...

(Nanowerk Spotlight) Biological potassium channels are marvels of selective permeability, allowing rapid transport of potassium ions (ionic radius of 1.3 Å) while blocking the smaller sodium ions (1.0 ...

Larger K+ (ionic radius: 1.3 Å) can selectively permeate larger Na + (ionic radius: 1.0 Å) through biological potassium ion channels, with selectivity ratios greater than 1000-fold. Scientists have ...

Nanoporous nanomaterials are nanostructured materials comprised of a framework and a regular, highly porous structure with pores that are 100 nm or smaller. These materials generally come in two forms ...