ArticlePhysical chemistry chemical physics : PCCP2025
MgO-water interface: structure and surface dissolution depend on flow and pH.
Article in Physical chemistry chemical physics : PCCP, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Shape Evolution of MgO Nanocubes via Rapid pH Self-Adjustment at Oxide-Water Interfaces.ACS nanoscience Au · 2026Article
- Phase Diagram of 2D Poly(Ethylene Oxide)-Langmuir : the ACS journal of surfaces and colloids · 2026Article
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Authors and funding
2 authors.
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Abstract
Magnesium oxide (MgO) is frequently in contact with water throughout numerous research and industrial applications and in nature. Remarkably, we found that there is a substantial influence on the interfacial structure and dissolution process whether water is flowing or static at the MgO(100) surface. Sum frequency generation spectroscopy revealed that flowing acidic solutions enhance the charging of the MgO surface, which leads to an increased net orientation of water close to the surface. Contrary, the MgO surface resembles a near neutrally charged state when in contact with static liquid for all tested solutions between pH 3 and pH 11. We explain this surprising observation with the dissolution of MgO in aqueous solutions, which effectively removes charge from the interfacial region. The continuous solution exchange due to flowing liquid shifts the equilibrium towards a more charged state in comparison to static liquid. Additionally, by investigating the transition from flowing to static liquid we found a reaction order of around 0.5 for the dissolution reaction with respect to the H
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