Water Interaction Dynamics with Metal Surfaces

Water at the interface of metal surfaces exhibits a rich array of phenomena that underpin processes ranging from corrosion and catalysis to ice formation and climate modelling. When water molecules approach a metal substrate, they may adsorb, reorient and form supramolecular hydrogen-bonded networks, or dissociate into hydroxyl and hydrogen species, depending on surface composition, temperature and presence of pre-adsorbed species such as oxygen or carbon monoxide. The balance between hydrophilic and hydrophobic regions, as dictated by lattice spacing, electronic structure and surface defects, controls wetting behaviour, nucleation pathways and growth modes of ordered ice or hydrate films. Advanced microscopy and spectroscopy techniques have disclosed molecular-scale structures, revealing how commensurability between water layers and substrate lattice influences strain relief in multilayer films, while competing kinetics govern monomer diffusion and cluster stability. Insights into these fundamental interactions inform the design of anti-icing coatings, corrosion-resistant alloys and catalytic interfaces for sustainable energy conversion.

Research from Nature Portfolio

Recent studies have identified a common water cluster nucleus on both hydrophilic and hydrophobic close-packed metal surfaces. Scanning tunnelling microscopy and non-contact atomic force microscopy have revealed a 15-molecule assembly, characterised by a central hexagon flanked by fused pentagons, which acts as the critical seed for two-dimensional ice growth on hydrophilic Pt(111) and three-dimensional ice on hydrophobic Cu(111). Another investigation has provided a molecular-level perspective on a kinetic barrier to ice nucleation by tracking water monomers on a graphene surface. Cooperative repulsive interactions extend monomer lifetimes in a free-gas-like phase, delaying island nucleation and offering experimental routes to control ice formation. Foundational work on a perovskite oxide surface has demonstrated how lattice distortions and octahedral rotations induce ordered hydroxyl overlayers, highlighting the role of surface geometry in dictating dissociative adsorption and subsequent proton transfer cascades.

Water Interaction Dynamics with Metal Surfaces publication trend

The graph below shows the total number of articles in water interaction dynamics with metal surfaces across all publications each year (not limited to Nature Index journals).

Technical terms

Heterogeneous ice nucleation: Formation of an ice phase at the interface between water and a solid substrate, influenced by surface structure and chemistry.

Hydrophilic/hydrophobic: Describes surfaces that preferentially attract or repel water, respectively, based on energetic favourability.

Chemisorption: Strong adsorption involving chemical bond formation between adsorbate and substrate.

Scanning tunnelling microscopy: Technique that images surfaces at the atomic scale by measuring tunnelling current between a sharp tip and the sample.

Non-contact atomic force microscopy: Imaging method that measures force interactions without direct tip–surface contact, allowing high-resolution surface characterisation.

Reflection absorption infrared spectroscopy: Surface-sensitive spectroscopic technique used to identify adsorbed molecular species via vibrational modes.

Commensurate layer: An adsorbed overlayer whose lattice periodicity matches that of the underlying substrate.

Hydroxyl: Surface-bound –OH species formed by dissociation of water molecules.

References

1. Identification of a common ice nucleus on hydrophilic and hydrophobic close-packed metal surfaces. Nature Communications (2023).
2. Motion of water monomers reveals a kinetic barrier to ice nucleation on graphene. Nature Communications (2021).
3. Ordered hydroxyls on Ca3Ru2O7(001). Nature Communications (2017).
4. Probing Water Dissociation and Oxygen Replacement on Partially Oxygen-Covered Cu(111) by Reflection Absorption Infrared Spectroscopy. The Journal of Physical Chemistry Letters (2023).
5. Water Structures Reveal Local Hydrophobicity on the In2O3(111) Surface. ACS Nano (2022).