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Updated: Dec 23, 2025
10:28
Probing the Structure and Dynamics of Interfacial Water with Scanning Tunneling Microscopy and Spectroscopy
Published on: May 27, 2018
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Anomalously High Proton Conduction of Interfacial Water
V G Artemov1, E Uykur2, P O Kapralov3
1Center for Energy Science and Technology, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia.
The Journal of Physical Chemistry Letters
|April 25, 2020
Summary
Interfacial water in nanoporous materials shows significantly higher protonic conductivity than bulk water due to unscreened charge carriers. This finding advances understanding of confined water properties for energy applications.
Area of Science:
- Physical Chemistry
- Materials Science
- Nanotechnology
Background:
- Water's anomalous properties at solid-liquid interfaces are not fully understood.
- Investigating interfacial water is crucial for developing advanced materials.
Purpose of the Study:
- To analyze the electrodynamic properties of interfacial water confined in nanoporous diamond matrices.
- To understand the mechanisms behind enhanced ionic conductivity in confined water.
Main Methods:
- Radio-frequency measurements of interfacial water in nanoporous diamond grains (5 nm to 0.5 μm).
- Analysis of electrodynamic properties and charge carrier behavior.
Main Results:
- Protonic conductivity in interfacial water can be up to 5 orders of magnitude higher than in bulk water.
- Charge carriers (protons/holes) in interfacial water are not mutually screened, leading to higher mobility.
Conclusions:
- The study elucidates the enhanced protonic conductivity of interfacial water in nanoporous materials.
- Findings support the development of novel proton-conductive materials for electrochemical energy systems, separations, and nanofluidics.
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