Ice or water: thermal properties of monolayer water adsorbed on a substrate

Abstract

Adsorbed water molecules on an ionic surface may exhibit an ordered monolayer on the surface. The ordered structure gives it many unique properties that are distinct from either liquid water or ice. We use molecular dynamics simulations to investigate the thermal properties of monolayer water, and find that its thermal conductivity is more similar to ice than to liquid water. The dependence of the thermal conductivity on the charge on the substrate and the temperature are studied. This study explores the density distribution of the water molecules to explain the dependence relations, and examines the effect of bulk water on the structure and thermal properties of monolayer water. Furthermore, kinetic energy transportation in monolayer water is studied.

Probing Hydrophilic Interface of Solid/Liquid-Water by Nanoultrasonics

“…Close to the surface, we have a solid like layer with a low viscosity and then the viscosity becomes higher than water similar to a viscous liquid. The observation of this solid-like viscosity behavior closer to the surface is in good agreement with literature 32 . The absence of layering effect in the density or bulk modulus can be explained by the relatively high roughness of the Al 2 O 3 surface, σ = 5 Å, which is larger than the distance between the expected layers, thus smoothing out the layering information.…”

Studying the thermal conductivity of a deep Eocene clay formation: Direct measurements vs back-analysis results

“…A liquid phase thermal conductivity inside the rock matrix of λwm = 0.80 Wm -1 K -1 (33% higher than free water 0.60 Wm -1 K -1 at 20ºC) can be accepted (adsorbed monolayer water can be around 2 to 3 Wm -1 K -1 , according to Ref. [24]). This way, an expected saturated λsat m of the rock matrix would be 3 Experimental programme for thermal conductivity measurement…”

Structural and configurational properties of nanoconfined monolayer ice from first principles

“…The behaviour of water at surfaces 17 18 19 20 21 22 and nanoconfined in three 23 , two 24 25 26 27 or one dimensions 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 74 is of importance for numerous biological, geological, and industrial systems, as well as being a useful testing ground for learning about the intrinsic properties of water itself 34 40 42 . In particular, several theoretical studies 33 34 35 41 43 44 45 46 47 48 49 have focussed on the properties of a quasi-2D monolayer of water confined in one dimension between infinite plates.…”