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|Ion and molecule sieving through highly stable graphene-based laminar membranes
01. Izmir Institute of Technology
|American Chemical Society
|Biological ion channels use both their sizes and residual groups to reject large ions and molecules and allow highly selective permeation of small species with similar sizes. To realize these properties in artificial membranes, the main challenge is the precise control of both the channel size and the interior at the nanoscale. Here we report the permeation of ions and molecules through interlayer channels in graphene-based laminar membranes. The amino groups decorated on channel walls are found to form hydrogen bond networks with intercalated water molecules, thus providing a highly stable laminate structure and a controlled channel size. Solutes with hydration diameters of >10 Å are precisely sieved out. Small species permeate through with selectivities of up to a few thousand, governed by their distinct electrical interactions with channels depending on the atomistic distance from the charged species to the channel walls. Our work offers important insights into manipulating channel structures for enhanced separation performance at the nanoscale.
|Funding text The authors acknowledge support from the National Key Research and Development Program of China (2019YFA0705400), the National Natural Science Foundation of China (21972121 and 22021001), the Fundamental Research Funds for the Central Universities (20720210017), and the BAGEP Award of the Science Academy with funding supplied by Sevinc-Erdal Inonu Foundation. Computational resources were partially provided by TUBITAK ULAKBIM, High Performance and Grid Computing Center (TR-Grid e-Infrastructure), and by the Flemish Supercomputer Center (VSC).
|Appears in Collections:
|Photonics / Fotonik
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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