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Wetting of prototypical one- and two-dimensional systems: Thermodynamics and density functional theory

Yatsyshin, Petr, Savva, Nikos and Kalliadasis, Serafim 2015. Wetting of prototypical one- and two-dimensional systems: Thermodynamics and density functional theory. Journal of Chemical Physics 142 (3) , 034708. 10.1063/1.4905605

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Abstract

Consider a two-dimensional capped capillary pore formed by capping two parallel planar walls with a third wall orthogonal to the two planar walls. This system reduces to a slit pore sufficiently far from the capping wall and to a single planar wall when the side walls are far apart. Not surprisingly, wetting of capped capillaries is related to wetting of slit pores and planar walls. For example, the wetting temperature of the capped capillary provides the boundary between first-order and continuous transitions to condensation. We present a numerical investigation of adsorption in capped capillaries of mesoscopic widths based on density functional theory. The fluid-fluid and fluid-substrate interactions are given by the pairwise Lennard-Jones potential. We also perform a parametric study of wetting in capped capillaries by a liquid phase by varying the applied chemical potential, temperature, and pore width. This allows us to construct surface phase diagrams and investigate the complicated interplay of wetting mechanisms specific to each system, in particular, the dependence of capillary wetting temperature on the pore width.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Mathematics
Subjects: Q Science > QA Mathematics
Q Science > QC Physics
Additional Information: PDF uploaded in accordance with publishers policy at http://www.sherpa.ac.uk/romeo/issn/0021-9606/ [accessed 21/08/2015]
Publisher: American Institute of Physics
ISSN: 0021-9606
Date of First Compliant Deposit: 30 March 2016
Date of Acceptance: December 2014
Last Modified: 14 Mar 2019 11:04
URI: http://orca.cf.ac.uk/id/eprint/69624

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