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Song, Woochul; Joshi, Himanshu; Chowdhury, Ratul; Najem, Joseph S; Shen, Yue-Xiao; Lang, Chao; Henderson, Codey B; Tu, Yu-Ming; Farell, Megan; Pitz, Megan E; Maranas, Costas D; Cremer, Paul S; Hickey, Robert J; Sarles, Stephen A; Hou, Jun-Li; Aksimentiev, Aleksei; Kumar, Manish
Nature nanotechnology, 01/2020, Letnik: 15, Številka: 1Journal Article
Artificial water channels are synthetic molecules that aim to mimic the structural and functional features of biological water channels (aquaporins). Here we report on a cluster-forming organic nanoarchitecture, peptide-appended hybrid4arene (PAH4), as a new class of artificial water channels. Fluorescence experiments and simulations demonstrated that PAH4s can form, through lateral diffusion, clusters in lipid membranes that provide synergistic membrane-spanning paths for a rapid and selective water permeation through water-wire networks. Quantitative transport studies revealed that PAH4s can transport >10 water molecules per second per molecule, which is comparable to aquaporin water channels. The performance of these channels exceeds the upper bound limit of current desalination membranes by a factor of ~10 , as illustrated by the water/NaCl permeability-selectivity trade-off curve. PAH4's unique properties of a high water/solute permselectivity via cooperative water-wire formation could usher in an alternative design paradigm for permeable membrane materials in separations, energy production and barrier applications.
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