Local order variations in confined hard-sphere fluids
arXiv:1310.8565 · doi:10.1063/1.4825176
Abstract
Pair distributions of fluids confined between two surfaces at close distance are of fundamental importance for a variety of physical, chemical, and biological phenomena, such as interactions between macromolecules in solution, surface forces, and diffusion in narrow pores. However, in contrast to bulk fluids, properties of inhomogeneous fluids are seldom studied at the pair-distribution level. Motivated by recent experimental advances in determining anisotropic structure factors of confined fluids, we analyze theoretically the underlying anisotropic pair distributions of the archetypical hard-sphere fluid confined between two parallel hard surfaces using first-principles statistical mechanics of inhomogeneous fluids. For this purpose, we introduce an experimentally accessible ensemble-averaged local density correlation function and study its behavior as a function of confining slit width. Upon increasing the distance between the confining surfaces, we observe an alternating sequence of strongly anisotropic versus more isotropic local order. The latter is due to packing frustration of the spherical particles. This observation highlights the importance of studying inhomogeneous fluids at the pair-distribution level.
10 pages, 7 figures
References in corpus (6)
- Layering and position-dependent diffusive dynamics of confined fluids
- Phase behavior of hard spheres confined between parallel hard plates: Manipulation of colloidal crystal structures by confinement
- Glass Transition in Confined Geometry
- Does confining the hard-sphere fluid between hard walls change its average properties?
- Hard sphere fluids in annular wedges: density distributions and depletion potentials
- Local order variations in confined hard-sphere fluids
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