Imaging Arrangements of Discrete Ions at Liquid–Solid Interfaces
Name
Li_de_Souza_2020_NanoLetters_imaging_ions.pdf
Description
Accepted version
Size
2.82 MB
Format
Adobe PDF
Checksum (MD5)
8543822629063565d974c6cb9b83de81
Author(s)
Li, Hao-Kun
Pedro de Souza, J
Zhang, Ze
Martis, Joel
Sendgikoski, Kyle
Cumings, John
Bazant, Martin Z
Majumdar, Arun
Date Issued
2020
Journal
Nano Letters
Publisher
American Chemical Society (ACS)
Version
Author's final manuscript
Abstract
© The individual and collective behavior of ions near electrically charged interfaces is foundational to a variety of electrochemical phenomena encountered in biology, energy, and the environment. While many theories have been developed to predict the interfacial arrangements of counterions, direct experimental observations and validations have remained elusive. Utilizing cryo-electron microscopy, here we directly visualize individual counterions and reveal their discrete interfacial layering. Comparison with simulations suggests the strong effects of finite ionic size and electrostatic interactions. We also uncover correlated ionic structures under extreme confinement, with the channel widths approaching the ionic diameter (∼1 nm). Our work reveals the roles of ionic size, valency, and confinement in determining the structures of liquid-solid interfaces and opens up new opportunities to study such systems at the single-ion level.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Mathematics
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1021/ACS.NANOLETT.0C02669
