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Density profiles of Ar adsorbed in slits of CO(2): Spontaneous symmetry breaking revisited

Laboratorio TANDAR, Departamento de Física, Comisión Nacional de Energía Atómica, Av. del Libertador 8250, RA-1429 Buenos Aires, Argentina.
The Journal of Chemical Physics (Impact Factor: 3.12). 04/2008; 128(12):124702. DOI: 10.1063/1.2895747
Source: PubMed

ABSTRACT A recently reported symmetry breaking of density profiles of fluid argon confined by two parallel solid walls of carbon dioxide is studied. The calculations are performed in the framework of a nonlocal density functional theory. It is shown that the existence of such asymmetrical solutions is restricted to a special choice for the adsorption potential, where the attraction of the solid-fluid interaction is reduced by the introduction of a hard-wall repulsion. The behavior as a function of the slit's width is also discussed. All the results are placed in the context of the current knowledge on this matter.

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