DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [3]; ORCiD logo [4]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [5];  [6];  [4];  [3];  [1]; ORCiD logo [5]; ORCiD logo [1]
  1. Univ. of Chicago, IL (United States)
  2. Northwestern Univ., Evanston, IL (United States); SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu (India)
  3. Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  4. Argonne National Laboratory (ANL), Argonne, IL (United States); Energy Frontier Research Centers (EFRC) (United States). Advanced Materials for Energy-Water Systems (AMEWS)
  5. Northwestern Univ., Evanston, IL (United States)
  6. Univ. of Illinois, Chicago, IL (United States)

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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Energy Frontier Research Centers (EFRC) (United States). Advanced Materials for Energy-Water Systems (AMEWS)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2274839
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 2 Vol. 121; ISSN 1091-6490; ISSN 0027-8424
Publisher:
National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
English

References (31)

Modeling the IR Spectra of Aqueous Metal Carboxylate Complexes: Correlation between Bonding Geometry and Stretching Mode Wavenumber Shifts journal March 2015
Ion Transport in Nanofluidic Devices for Energy Harvesting journal October 2019
Superselective Removal of Lead from Water by Two-Dimensional MoS2 Nanosheets and Layer-Stacked Membranes journal August 2020
Coordination-Dependent Spectroscopic Signatures of Divalent Metal Ion Binding to Carboxylate Head Groups: H 2 - and He-Tagged Vibrational Spectra of M 2+ ·RCO 2 ¯ (M = Mg and Ca, R = −CD 3 , −CD 2 CD 3 ) Complexes journal January 2017
Controlling the Structure of MoS 2 Membranes via Covalent Functionalization with Molecular Spacers journal October 2020
Understanding the Aqueous Stability and Filtration Capability of MoS 2 Membranes journal November 2017
Phenomenological Theory of Ion Solvation. Effective Radii of Hydrated Ions journal September 1959
Chemistry of ion coordination and hydration revealed by a K+ channel–Fab complex at 2.0 Å resolution journal November 2001
The open pore conformation of potassium channels journal May 2002
Materials for next-generation desalination and water purification membranes journal April 2016
Control of ion selectivity in potassium channels by electrostatic and dynamic properties of carbonyl ligands journal October 2004
Massive radius-dependent flow slippage in carbon nanotubes journal September 2016
Molecular transport through capillaries made with atomic-scale precision journal September 2016
Ion sieving in graphene oxide membranes via cationic control of interlayer spacing journal October 2017
Observation of ionic Coulomb blockade in nanopores journal March 2016
Anomalous ion transport in 2-nm hydrophilic nanochannels journal November 2010
Heterogeneous sub-continuum ionic transport in statistically isolated graphene nanopores journal October 2015
Enhanced sieving from exfoliated MoS2 membranes via covalent functionalization journal August 2019
Fast water transport and molecular sieving through ultrathin ordered conjugated-polymer-framework membranes journal August 2022
Towards single-species selectivity of membranes with subnanometre pores journal June 2020
New avenues for the large-scale harvesting of blue energy journal November 2017
Artificial channels for confined mass transport at the sub-nanometre scale journal January 2021
Molecular streaming and its voltage control in ångström-scale channels journal March 2019
The Structure of the Potassium Channel: Molecular Basis of K+ Conduction and Selectivity journal April 1998
Enhanced water permeability and tunable ion selectivity in subnanometer carbon nanotube porins journal August 2017
Size effect in ion transport through angstrom-scale slits journal October 2017
Complete steric exclusion of ions and proton transport through confined monolayer water journal January 2019
Atomic-scale ion transistor with ultrahigh diffusivity journal April 2021
CdPS 3 nanosheets-based membrane with high proton conductivity enabled by Cd vacancies journal October 2020
Modeling of emergent memory and voltage spiking in ionic transport through angstrom-scale slits journal August 2021
Introduction to the Theme “Ion Channels and Neuropharmacology: From the Past to the Future” journal January 2020