Multilayer adsorption of xenon, krypton, and argon on graphite: An ellipsometric study

Hs, Youn; Meng, XF; Hess, G. B.

doi:10.1103/physrevb.48.14556

Cited by 54 publications

(31 citation statements)

References 61 publications

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“…This result, which corroborates previous finding by Zhu and Dash34 and Youn and Hess,36 are in agreement with the molecular simulation data reported in the present work. In particular, Day and coworkers found that the first layer melts at a temperature between 84.5 and 95 K, depending on the exact film thickness (the melting temperature increases with increasing the film thickness), while the second layer melts at a temperature of 85 K (the bulk triple point is 83 K).…”

supporting

confidence: 96%

Effect of Surface Texture on Freezing in Nanopores: Surface-Induced versus Homogeneous Crystallization

Coasne

2015

Langmuir

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Freezing of argon in ordered and disordered carbon pores of a similar diameter D ∼ 2.4 nm is investigated using extensive molecular simulations with large system sizes up to 10(4) atoms. While crystallization in the atomistically smooth pore consists in a surface-induced phase transition occurring at a temperature larger than the bulk, crystallization in the disordered pores, which is only partial as it is spatially restricted to the pore center, occurs through homogeneous crystallization. These results shed light on solidification in pores by showing that there is a crossover between surface-induced and homogeneous crystallization upon increasing the surface disorder of the host material. In the latter case, the Gibbs-Thomson equation, in which crystallization is assumed to occur when the crystal size equals the pore size corrected for the thickness of the unfreezable layer at the pore surface, is in reasonable agreement with the observed freezing temperature.

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supporting

confidence: 96%

Effect of Surface Texture on Freezing in Nanopores: Surface-Induced versus Homogeneous Crystallization

Coasne

2015

Langmuir

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“…They also reported the heat of adsorption, which is constant across the phase transition. The detailed isotherm measurements of Thomy and Duval were confirmed with Auger electron spectroscopy by Suzanne [7], with X-ray scattering on 0001 surfaces of graphite from the work of Hammonds et al [25], and by ellipsometry of Youn et al [26]. The latter shows details in the multiple layers and reports many interesting phenomena, such as re-entrant first order layering, wetting, surface melting, and surface roughening and pre-roughening of the adsorbate.…”

Section: Introductionmentioning

confidence: 79%

On the anatomy of the adsorption heat versus loading as a function of temperature and adsorbate for a graphitic surface

Do¹,

Nicholson²,

Do³

2008

Journal of Colloid and Interface Science

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“…Similarly for gold surfaces we merely tested contact angle on freshly evaporated gold films. Future improvements should include annealing the graphite under an argon atmosphere and examining the effect of water purity [30].…”

Section: Discussionmentioning

confidence: 99%

Validity of the “Sharp-Kink Approximation” for Water and Other Fluids

2008

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The contact angle of a liquid droplet on a solid surface is a direct measure of fundamental atomic-scale forces acting between liquid molecules and the solid surface. In this work, the validity is assessed of a simple equation, which approximately relates the contact angle of a liquid on a surface to its density, its surface tension, and the effective molecule-surface potential. This equation is derived in the sharp-kink approximation, where the density profile of the liquid is assumed to drop precipitously within one molecular diameter of the substrate. It is found that this equation satisfactorily reproduces the temperature-dependence of the contact angle for helium on alkali metal surfaces. The equation also seems be applicable to liquids such as water on solid surfaces such as gold and graphite, based on a comparison of predicted and measured contact angles near roomtemperature. Nevertheless, we conclude that, to fully test the equation's applicability to fluids such as water, it remains necessary to measure the contact angle's temperature-dependence. We hypothesize that the effects of electrostatic forces can increase with temperature, potentially driving the wetting temperature much higher and closer to the critical point, or lower, closer to room temperature, than predicted using current theories.

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Multilayer adsorption of xenon, krypton, and argon on graphite: An ellipsometric study

Cited by 54 publications

References 61 publications

Effect of Surface Texture on Freezing in Nanopores: Surface-Induced versus Homogeneous Crystallization

Effect of Surface Texture on Freezing in Nanopores: Surface-Induced versus Homogeneous Crystallization

On the anatomy of the adsorption heat versus loading as a function of temperature and adsorbate for a graphitic surface

Validity of the “Sharp-Kink Approximation” for Water and Other Fluids

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