Nat. Commun. published - Hydration shells
Water molecules adsorb molecularly and dissociatively at surfaces of iron oxides. Now, for the first time, we could show with pair distribution function (PDF) experiments on aqueous dispersions of iron oxide nanoparticles that the water molecules adsorb and reorient at the particle surface. To our surprise, hydration shells around 7 and 15 nm sized magnetic iron oxide nanoparticles are comparable and just like for planar interfaces. The small organic capping agents used for particle stabilization do not show a major impact on the water restructuring, whereas the interfacial structure is mainly dominated by the crystallinity of the particles. Individual interatomic distances of moleculary and dissociatively adsorbed water molecules directly at the particle surface could be identified, as predicted by theory.
Publication: Sabrina L. J. Thomä et al.: Atomic insight into hydration shells around facetted nanoparticles, Nature Communications (2019), DOI: 10.1038/s41467-019-09007-1.
Full text of the publication.
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