Observing ion diffusion and reciprocating hopping motion in water
When an ionic crystal dissolves in solvent, the positive and negative ions associated with solvent molecules release from the crystal. However, the existing form, interaction, and dynamics of ions in real solution are poorly understood because of the substantial experimental challenge. We observed the diffusion and aggregation of polyoxometalate (POM) ions in water by using liquid phase transmission electron microscopy. Real-time observation reveals an unexpected local reciprocating hopping motion of the ions in water, which may be caused by the short-range polymerized bridge of water molecules. We find that ion oligomers, existing as highly active clusters, undergo frequent splitting, aggregation, and rearrangement in dilute solution. The formation and dissociation of ion oligomers indicate a weak counterion-mediated interaction. Furthermore, POM ions with tetrahedral geometry show directional interaction compared with spherical ions, which presents structure-dependent dynamics.
NI Journal Papers ; NI论文
National Natural Science Foundation of China["22288102","U22A20396","3210127","22021001","21673198","21991151","21991150","91934303"] ; Fundamental Research Funds for the Central Universities ; National Key Research and Development Program of China[2017YFA0206500] ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences (BES), Materials Sciences and Engineering Division within the in situ TEM program["DE-AC02-05-CH11231","KC22ZH"]
|WOS Research Area|
Science & Technology - Other Topics
|WOS Accession No|
Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||Department of Materials Science and Engineering|
1.State Key Laboratory of Physical Chemistry of Solid Surfaces,Collaborative Innovation Center of Chemistry for Energy Materials,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen,361005,China
2.College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou,730000,China
3.National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
4.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
5.Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
6.Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA
Liu，Sangui,Han，Xinbao,Ophus，Colin,et al. Observing ion diffusion and reciprocating hopping motion in water[J]. Science advances,2023,9(30).
Liu，Sangui.,Han，Xinbao.,Ophus，Colin.,Zhou，Shiyuan.,Jiang，You Hong.,...&Liao，Hong Gang.(2023).Observing ion diffusion and reciprocating hopping motion in water.Science advances,9(30).
Liu，Sangui,et al."Observing ion diffusion and reciprocating hopping motion in water".Science advances 9.30(2023).
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