Confinement effects on phase behavior of soft matter systems.

  title={Confinement effects on phase behavior of soft matter systems.},
  author={Kurt Binder and J{\"u}rgen Horbach and Richard L. C. Vink and Andr{\'e}s De Virgiliis},
  journal={Soft matter},
  volume={4 8},
When systems that can undergo phase separation between two coexisting phases in the bulk are confined in thin film geometry between parallel walls, the phase behavior can be profoundly modified. These phenomena shall be described and exemplified by computer simulations of the Asakura-Oosawa model for colloid-polymer mixtures, but applications to other soft matter systems (e.g. confined polymer blends) will also be mentioned. Typically a wall will prefer one of the phases, and hence the… 
From capillary condensation to interface localization transitions in colloid-polymer mixtures confined in thin-film geometry.
Monte Carlo simulations of the Asakura-Oosawa model for colloid-polymer mixtures confined between two parallel repulsive structureless walls are presented and analyzed in the light of current
Phase behaviors of polymer solution confined between two concentric cylinders
Abstract A theoretical study on the phase behaviors of a polymer solution confined between two coaxial cylindrical walls is presented. For the case of a neutral inner cylinder, the spinodal point
Cluster crystals in confinement
A large class of fluids of particles interacting via ultrasoft, repulsive pair potentials crystallize into cluster crystals. Here, we employ density functional theory and computer simulations to
Phase Coexistence in Nanoscopically Thin Films Confined by Asymmetric Walls
Thin Ising films with nearest-neighbor ferromagnetic exchange in a bulk magnetic field H are studied in a L×L×D geometry, where at the opposite walls, given by the L×L surfaces, local magnetic fields
Capillary condensation in cylindrical pores: Monte Carlo study of the interplay of surface and finite size effects.
The density distribution changes gradually from a double-peak structure to a triple-peak shape, and the correlation length in the axial direction becomes much smaller than the cylinder length, and it is suggested that adsorption hysteresis vanishes when the transition from the simple domain state to the multidomain state of the cylindrical pore occurs.
Spurious character of singularities associated with phase transitions in cylindrical pores
Phase transitions of simple fluids and binary fluid mixtures confined into long cylindrical pores are re-examined, such as capillary condensation/evaporation and wetting transitions. While a large
Phase behavior of colloidal suspensions with critical solvents in terms of effective interactions.
This work explores the possibility of phase coexistence between two phases of colloidal suspensions, one being rich and the other being poor in colloidal particles, and employs an approach in terms of effective, one-component colloidal systems.
Layering transitions and solvation forces in an asymmetrically confined fluid.
How the mean-field DFT results might be altered by including effects of fluctuations and how the phenomenology revealed might be relevant for experimental and simulation studies of water confined between hydrophilic and hydrophobic substrates are discussed.
Fluid-fluid demixing of off-critical colloid-polymer systems confined between parallel plates.
A sample where the loss of wetting phase material to the surfaces causes a shift from a morphology associated with an unstable sample, showing spinodal decomposition, to that associated with a metastable sample underlines the importance of the rich interplay between the viscosity contrast and the local volume fraction on the observed morphologies.
Phase behavior of colloidal suspensions with critical solvents
Colloidal suspensions, i.e., nano- to micrometer sized particles immersed in a solvent, are interesting, both for applications which are present in various kinds in our daily life as well as for


Phase diagram and structure of colloid-polymer mixtures confined between walls.
The influence of confinement, due to flat parallel structureless walls, on phase separation in colloid-polymer mixtures, is investigated by means of grand-canonical Monte Carlo simulations, and the critical behavior of the confined mixture is described by "effective" critical exponents.
Anomalous size-dependence of interfacial profiles between coexisting phases of polymer mixtures in thin-film geometry: A Monte Carlo simulation
The interfacial profile between coexisting phases of a binary mixture (A,B) in a thin film of thickness D and lateral linear dimensions L depends sensitively on both the linear dimensions and on the
Critical behavior of a colloid-polymer mixture confined between walls.
This work investigates the influence of confinement on phase separation in colloid-polymer mixtures and observes that the critical exponent of the order parameter in the confined system is smaller than in 3D bulk, yielding a "flatter" binodal.
Phase behavior and structure of model colloid-polymer mixtures confined between two parallel planar walls.
This work investigates the fluid-fluid demixing transition in inhomogeneous colloid-polymer mixtures confined between two parallel plates with separation distances between one and ten colloid diameters covering the complete range from quasi-two-dimensional to bulklike behavior.
Effects of finite thickness on interfacial widths in confined thin films of coexisting phases
Abstract:The capillary broadening of a 2-phase interface is investigated both experimentally and theoretically. When a binary mixture in a thin film with thickness D segregates into two coexisting
Symmetric polymer blend confined into a film with antisymmetric surfaces: interplay between wetting behavior and the phase diagram
  • Muller, Albano, Binder
  • Materials Science, Physics
    Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
  • 2000
Over a wide range of parameters the authors find strong first-order wetting transitions for the semi-infinite system, and the interplay between the wetting/prewetting behavior and the phase diagram in confined geometry is investigated.
Interplay Between Wetting and Phase Behavior in Binary Polymer Films and Wedges: Monte Carlo Simulations and Mean Field Calculations
Confining a binary mixture, one can profoundly alter its miscibility behavior. The qualitative features of miscibility in confined geometry are ratheruniversal and shared by polymer mixtures as well
Finite size effects on the phase diagram of a binary mixture confined between competing walls
A symmetrical binary mixture AB that exhibits a critical temperature Tcb of phase separation into an A- and a B-rich phase in the bulk is considered in a geometry confined between two parallel plates
Novel phase behaviour of a confined fluid or Ising magnet
Abstract The phase behaviour of a simple fluid or Ising magnet (at temperatures above its roughening transition) confined between parallel walls that exert opposing surface fields h 2 = - h 1 is
Phase separation in confined systems
We review the current state of knowledge of phase separation and phase equilibria in porous materials. Our emphasis is on fundamental studies of simple fluids (composed of small, neutral molecules)