ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
We report results of numerical analyses on the macroparticle interactions immersed in a simple model system of nonpolar liquid containing trace amounts of water. The singlet Ornstein–Zernike approach with the reference hypernetted-chain closures is employed. Particles of component 1 (water) are characterized by strong attractive interaction among them, those of component 2 (nonpolar liquid) are hard spheres, and particles of different components interact through hard-sphere potential. The mole fraction of component 1 x1 is very small. Beyond x1=x1P, the mixture cannot exist, even in the metastable state with a single phase. Some affinity is considered only between the macroparticle surface and component 1. When the affinity ξ (negative ξ implies repulsion) is increased with fixing x1 (at a value significantly smaller than x1P) and the macroparticle diameter dM, the macroparticle interaction φMM shifts to the lower (more attractive) side and eventually becomes extremely long-ranged and divergent. For larger x1, the divergence occurs at lower ξ. Whenever φMM becomes divergent, the reduced density profile of component 1 near the surface also becomes extremely long-ranged and divergent. The effects of dM on φMM is also analyzed. At the stability limit (x1→x1P), the divergences occur irrespective of ξ and dM, which is consistent with the recent prediction [Attard et al., Phys. Rev. A 45, 7621 (1992)]. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.472521
Permalink