An attempt to explain bimodal behaviour of the sapphire c-plane electrolyte interface

Lützenkirchen, Johannes; Zimmermann, Ralf; Preočanin, Tajana; Filby, A.; Kupcik, T.; Küttner, David; Abdelmonem, Ahmed; Schild, Dieter; Rabung, Thomas; Plaschke, M.; Brandenstein, F.; Werner, Carsten; Geckeis, Horst

doi:10.1016/j.cis.2010.03.003

Cited by 81 publications

(139 citation statements)

References 65 publications

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“…Moreover, the presence of defects leads to partial disruption of the structure of the twodimensional hydrogen bond network within the water monolayer. These results would be useful in the actual fabrication of novel material (Lutzenkirchen et al 2010), which could have potential applications in water treatment and self-cleaning of surfaces. Although great strides in the investigation of ordered water surfaces have been made, we note that further experimental confirmation is still much needed for biological macromolecules surfaces and materials interfaces.…”

Section: Discussionmentioning

confidence: 95%

Ordered water monolayer at room temperature

Wang

Fang

2011

Rend. Fis. Acc. Lincei

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The wetting behavior of surfaces has a fundamental bearing on various phenomena that arise in physics, chemistry, biology, nanoscience, and nanotechnology. Water confined on the nanometer scale, usually exhibits behavior different from bulk systems and significantly depends on the structure of nanoscale systems. Here, we review some of our recent progress on the effect of ordered water monolayers on wetting, which serves as direct evidence for the unexpected phenomenon of ''water that does not completely wet water'' at room temperature. The mechanism underlying this novel phenomenon is presented. Further, we discuss the recent experimental observations and applications related to those findings.

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Section: Discussionmentioning

confidence: 95%

Ordered water monolayer at room temperature

Wang

Fang

2011

Rend. Fis. Acc. Lincei

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“…Thus pre-adsorbed water would be the more reasonable option. Such water films have actually been proposed on sapphire basal planes based on experimental data (Lützenkirchen et al, 2010) and reported in MD simulations (Argyris et al, 2011). This scenario, which may explain the decrease in SHG intensity upon deposition freezing, condensation, and the growth of liquid layers, involves the preexistence of a 2-D bilayer of water on the surface.…”

Section: Resultsmentioning

confidence: 99%

Direct molecular-level characterization of different heterogeneous freezing modes on mica – Part 1

Abdelmonem

2017

Atmos. Chem. Phys.

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Abstract. The mechanisms behind heterogeneous ice nucleation are of fundamental importance to the prediction of the occurrence and properties of many cloud types, which influence climate and precipitation. Aerosol particles act as cloud condensation and freezing nuclei. The surface-water interaction of an ice nucleation particle plays a major, not well explored, role in its ice nucleation ability. This paper presents a real-time molecular-level comparison of different freezing modes on the surface of an atmospherically relevant mineral surface (mica) under varying supersaturation conditions using second-harmonic generation spectroscopy. Two sub-deposition nucleation modes were identified (one-and two-stage freezing). The nonlinear signal at the water-mica interface was found to drop following the formation of a thin film on the surface regardless of (1) the formed phase (liquid or ice) and (2) the freezing path (one or two step), indicating similar molecular structuring. The results also revealed a transient phase of ice at water-mica interfaces during freezing, which has a lifetime of around 1 min. Such information will have a significant impact on climate change, weather modification, and the tracing of water in hydrosphere studies.

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“…Like quartz (1 0 1 0) and (1 0 1 1) these surfaces are predicted to display low surface charge over a relatively wide pH range and have surface functional groups that are charge-neutral when lacking unsaturated valence (Hiemstra et al, 1989Zhang et al, 2008;Lü tzenkirchen et al, 2010). Past structural studies of these surfaces have been conducted in air or a humidified He gas environment (Eng et al, 2000;Trainor et al, 2004;Tanwar et al, 2009).…”

Section: Introductionmentioning

confidence: 95%

“…However, the spatial relationship of interfacial water with respect to the surface cannot be directly determined with this method. In addition, multiple lines of evidence imply that water near the corundum (0 0 1) surface may be weakly ordered (Lü tzenkirchen et al, 2010). While it is thus clear that water is likely ordered to some extent above the (0 0 1) surfaces of hematite and corundum, the arrangement of water and the degree of ordering on these surfaces is unresolved.…”

Section: Introductionmentioning

confidence: 98%