Comment on “Liquids on Topologically Nanopatterned Surfaces”

Rascón, C.

doi:10.1103/physrevlett.98.199801

Cited by 9 publications

(12 citation statements)

References 5 publications

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“…It is also interesting to compare our results to calculations which employ approximate liquid profiles based on a simple geometric construction proposed by Rascon and Parry [5]. Within this construction the liquid-vapor interface is obtained by first coating the substrate with a film of thickness l $ ÁT À1=3 , using the same Hamaker constant given above, followed by fitting a meniscus with a radius which equals Kelvin's radius at the point(s) of maximum curvature [19]. The scattering intensity obtained using these approximated profiles (Fig.…”

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confidence: 94%

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Wetting of Nanopatterned Grooved Surfaces

et al. 2010

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The wetting by perfluoromethylcyclohexane of a well-defined silicon grating with a channel width of 16 nm has been studied using transmission small angle x-ray scattering. Prefilling, capillary filling, and postfilling wetting regimes have been identified. A detailed comparison of the data with theory reveals the importance of long-ranged substrate-fluid and fluid-fluid interactions for determining the wetting behavior on these length scales, especially at the onset of capillary condensation and in the prefilling regime.

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confidence: 94%

“…Solid line: DFT calculation. Dashed line: DFT calculation including a 10% wide distribution of D. Dot-dashed line: geometric construction[5,19].…”

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confidence: 99%

Wetting of Nanopatterned Grooved Surfaces

et al. 2010

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“…A simple extension of these idealized geometries, which has received a great deal of recent attention, is a groove or capped capillary formed by scoring a narrow deep channel or array of channels into a solid surface (see figure 1). Capping a capillary strongly influences the nature of condensation and evaporation, compared to that occurring in an infinite open capillary-slit, because of the presence of a meniscus, which must unbind from the groove bottom (top) at condensation (evaporation) [14][15][16][17][18][19][20][21][22][23][24]. The purpose of the present paper is to investigate the nature of this meniscus unbinding in a model microscopic density functional theory (DFT) incorporating realistic long-ranged intermolecular forces.…”

Section: Introductionmentioning

confidence: 99%

Condensation and evaporation transitions in deep capillary grooves

Malijevský¹,

Parry²

2014

J. Phys.: Condens. Matter

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We study the order of capillary condensation and evaporation transitions of a simple fluid adsorbed in a deep capillary groove using a fundamental measure density functional theory (DFT). The walls of the capillary interact with the fluid particles via long-ranged, dispersion, forces while the fluid-fluid interaction is modelled as a truncated Lennard-Jones-like potential. We find that below the wetting temperature Tw condensation is first-order and evaporation is continuous with the metastability of the condensation being well described by the complementary Kelvin equation. In contrast above Tw both phase transitions are continuous and their critical singularities are determined. In addition we show that for the evaporation transition above Tw there is an elegant mapping, or covariance, with the complete wetting transition occurring at a planar wall. Our numerical DFT studies are complemented by analytical slab model calculations which explain how the asymmetry between condensation and evaporation arises out of the combination of long-ranged forces and substrate geometry.

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“…We have used the geometrical construction proposed by Rascon 49 to calculate the liquid adsorption inside the cavity as a function of DT. According to this model, a liquid layer of thickness D given by eqn (3) uniformly coats the cavity and a meniscus with the Kelvin radius r Kelvin forms at the bottom corners of the cavities (see panel b), where r Kelvin ¼ 9.5 nm.…”

Section: Discussionmentioning

confidence: 99%