Wetting, Prewetting and Superfluidity

Taborek, P.

doi:10.1007/s10909-009-9906-y

Cited by 11 publications

(7 citation statements)

References 50 publications

(69 reference statements)

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“…The present article is not the place to review these many calculations. We note also that the film coverage greatly influences its superfluid properties, a dependence which has been explored experimentally by the UC Irvine group [22,25,74], but not theoretically to any significant extent.…”

Section: If a Given System's Value Of D Falls Below A Specific Line Inmentioning

confidence: 82%

“…These experiments, as well as those of the contact angle, on alkali metals are described in articles of Taborek and Saam in this volume. [22,23] One can investigate these transitions with approximate models, like those discussed in Sect.III, or with more reliable computer simulations. An example of the latter appears in Fig.…”

Section: Wetting Transitions On Alkali and Alkaline Earth Metalsmentioning

confidence: 99%

“…The general subject of wetting transitions has been reviewed in a number of places, including articles in this volume by Saam, by Ancilotto et al and by Taborek [2,[21][22][23][24][25][26][27][28]. The focus of the present article is the relationship between this transition and the gas-surface interaction, which plays a decisive role in whether and where such transitions occur.…”

Section: Introductionmentioning

confidence: 99%

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To Wet or Not to Wet: That Is the Question

Gatica

Cole

2009

J Low Temp Phys

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Wetting transitions have been predicted and observed to occur for various combinations of fluids and surfaces. This paper describes the origin of such transitions, for liquid films on solid surfaces, in terms of the gas-surface interaction potentials V(r), which depend on the specific adsorption system. The transitions of light inert gases and H 2 molecules on alkali metal surfaces have been explored extensively and are relatively well understood in terms of the least attractive adsorption interactions in nature. Much less thoroughly investigated are wetting transitions of Hg, H 2 O, heavy inert gases and other molecular films. The basic idea is that nonwetting occurs, for energetic reasons, if the adsorption potential's well-depth D is smaller than, or comparable to, the well-depth ε of the adsorbate-adsorbate mutual interaction. At the wetting temperature, T w , the transition to wetting occurs, for entropic reasons, when the liquid's surface tension is sufficiently small that the free energy cost in forming a thick film is sufficiently compensated by the fluidsurface interaction energy. Guidelines useful for exploring wetting transitions of other systems are analyzed, in terms of generic criteria involving the "simple model", which yields results in terms of gas-surface interaction parameters and thermodynamic properties of the bulk adsorbate.

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Section: If a Given System's Value Of D Falls Below A Specific Line Inmentioning

confidence: 82%

Section: Wetting Transitions On Alkali and Alkaline Earth Metalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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To Wet or Not to Wet: That Is the Question

Gatica

Cole

2009

J Low Temp Phys

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“…In such cases, the wetting does not occur below the triple point, which is related to the strain induced by the structural mismatch between successive solid-like layers [54,55]. A pinning of the wetting transition at the triple point (triple point wetting) has been observed for several systems, like various gases adsorbed on graphite [56][57][58], on Ag [59,60], on Au [61,62], and on alkaline metals [63].…”

Section: Resultsmentioning

confidence: 99%

Non-additive symmetric mixtures at selective walls

Patrykiejew¹

2018

Condens. Matter Phys.

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The results of Monte Carlo simulation of adsorption and wetting behaviour of a highly non-additive symmetric mixture at selective walls is discussed. We have concentrated on the interplay between the surface induced demixing in the adsorbed films and the properties of the bulk mixture, which exhibits a closed immiscibility loop. It has been shown that the wetting behaviour depends on the absolute values of the parameters determining the strengths of interaction between the mixture components and the surface, as well as on their difference. In general, an increase of the difference between the adsorption energies of the components leads to a decrease of the wetting temperature. In the cases when the wetting of non-selective walls occurs at the temperatures above the onset of demixing transition in the bulk, an increasing wall selectivity leads to a gradual decrease of the wetting temperature towards the triple point, in which the vapour coexists with the mixed and demixed liquid phases. When the wetting temperature at the non-selective wall is located below the onset of the demixing transition in the bulk mixture, an increase of the adsorption energy of the selected component causes the developing adsorbed films to demix and to show the reentrant mixing upon approaching the bulk coexistence. At the temperatures above the onset of the demixing transition in the bulk, the adsorbed films remain demixed up to the bulk coexistence and undergo the first-order wetting transition. A rather unexpected finding has been the observation of a gradual increase of the wetting temperature at highly selective walls.

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“…Based on this effect alone, no thin film is predicted to form on stronger substrates, such as Mg and graphite. The predictions made in this work appear to be experimentally testable, given the wealth of investigative work carried out over the past two decades, aimed at characterizing the physics of 4 He films adsorbed on alkali substrates [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49].…”

mentioning

confidence: 86%

Quasi-2D Liquid He-3

Ruggeri,

Moroni,

Boninsegni

2013

Preprint

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Quantum Monte Carlo simulations at zero temperature of an ensemble of 3 He atoms adsorbed on Mg and Alkali substrates yield strong evidence of a thermodynamically stable liquid 3 He monolayer on all Alkali substrates, with the possible exception of Li. The effective 2D density is θ ≈ 0.02 Å−2 on Na, making it the lowest density liquid in Nature. Its existence is underlain by zero-point atomic motion perpendicular to the substrate, whose effect is softening the short-range repulsion of the helium interatomic potential. The monolayer films should turn superfluid at a temperature Tc ∼ 1 mK. No liquid film is predicted to form on Mg, or on stronger substrates such as graphite.

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Wetting, Prewetting and Superfluidity

Cited by 11 publications

References 50 publications

To Wet or Not to Wet: That Is the Question

To Wet or Not to Wet: That Is the Question

Non-additive symmetric mixtures at selective walls

Quasi-2D Liquid He-3

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