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Published January 2, 2024 | Version v1
Journal article Open

Anomalously enhanced ion transport and uptake in functionalized angstrom-scale two-dimensional channels

Creators

  • 1. University of Chicago
  • 2. Northwestern University
  • 3. Argonne National Laboratory
  • 4. University of Illinois at Chicago

Description

Emulating angstrom-scale dynamics of the highly selective biological ion channels is a challenging task. Recent work on angstrom-scale artificial channels has expanded our understanding of ion transport and uptake mechanisms under confinement. However, the role of chemical environment in such channels is still not well understood. Here, we report the anomalously enhanced transport and uptake of ions under confined MoS2-based channels that are ~five angstroms in size. The ion uptake preference in the MoS2-based channels can be changed by the selection of surface functional groups and ion uptake sequence due to the interplay between kinetic and thermodynamic factors that depend on whether the ions are mixed or not prior to uptake. Our work offers a holistic picture of ion transport in 2D confinement and highlights ion interplay in this regime.

Data availability

All study data are included in the article and/or SI Appendix.

Files

wang-et-al-2024-anomalously-enhanced-ion-transport-and-uptake-in-functionalized-angstrom-scale-two-dimensional-channels.pdf

Files (6.2 MB)

Additional details

Identifiers

DOI
10.1073/pnas.2313616121
Other
oai:uchicago.tind.io:10344

Funding

U.S. Department of Energy
DE-AC02-06CH11357

UChicago Information

Division(s)
Physical Sciences Division, Pritzker School of Medicine
Department(s)
Chemistry
Center(s) or Institute(s)
James Franck Institute