Leszek Szybisz

Density profiles of Ar adsorbed in slits of CO2: Spontaneous symmetry breaking revisited

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 slits width is also discussed. All the results are placed in the context of the current knowledge on this matter.

Adsorption of 4He on a Single C60

The adsorption of 4He inside and outside a single fullerene C60 is studied. A physisorption potential is proposed. The energetics and structural features of C60-4HeN clusters are investigated within the framework of nonlocal density functionals. Particular attention is paid to the growth of the highly pronounced layered density profile. The evolution towards bulk liquid and surface thickness at the free interface are discussed.

Statistical mechanics of two hard spheres in a spherical pore, exact analytic results in D dimension

This work is devoted to the exact statistical mechanics treatment of simple inhomogeneous few-body systems. The system of two hard spheres (HSs) confined in a hard spherical pore is systematically analyzed in terms of its dimensionality D. The canonical partition function and the one- and two-body distribution functions are analytically evaluated and a scheme of iterative construction of the D+1 system properties is presented. We analyze in detail both the effect of high confinement, when particles become caged, and the low density limit. Other confinement situations are also studied analytically and several relations between the two HSs in a spherical pore, two sticked HSs in a spherical pore, and two HSs on a spherical surface partition functions are traced. These relations make meaningful the limiting caging and low density behavior. Turning to the system of two HSs in a spherical pore, we also analytically evaluate the pressure tensor. The thermodynamic properties of the system are discussed. To accom...

Finite size effects in adsorption of helium mixtures by alkali substrates

AbstractWe investigate the behavior of mixed 3He–4He droplets on alkali surfaces at zero temperature, within the frame of Finite Range Density Functional theory. The properties of one single 3He atom on

Correlation between asymmetric profiles in slits and standard prewetting lines

^4 He_{N_4 }

SPONTANEOUS SYMMETRY BREAKING AND FIRST-ORDER PHASE TRANSITIONS OF ADSORBED FLUIDS

droplets on different alkali surfaces are addressed, and the energetics and structure of

Full correspondence between asymmetric filling of slits and first-order phase transition lines

^4 He_{N_4 } + ^3 He_{N_3 }