Capillary bridging and long-range attractive forces in a mean-field approach
arXiv:cond-mat/0406372 · doi:10.1063/1.1778154
Abstract
When a mixture is confined, one of the phases can condense out. This condensate, which is otherwise metastable in the bulk, is stabilized by the presence of surfaces. In a sphere-plane geometry, routinely used in atomic force microscope (AFM) and surface force apparatus (SFA), it can form a bridge connecting the surfaces. The pressure drop in the bridge gives rise to additional long-range attractive forces between them. Minimizing the free energy of a binary mixture we obtain the force-distance curves as well as the structural phase diagram of the configuration with the bridge. Numerical results predict a discontinuous transition between the states with and without the bridge and linear force-distance curves with hysteresis. We also show that similar phenomenon can be observed in a number of different systems, e.g. liquid crystals and polymer mixtures.
References in corpus (3)
Cited by in corpus (20)
- Critical Casimir effect in classical binary liquid mixtures
- Direct measurements of hydrophobic slippage using double-focus fluorescence cross-correlation
- Tensorial slip of super-hydrophobic channels
- Solvent mediated interactions between model colloids and interfaces: A microscopic approach
- Drag force on a sphere moving towards an anisotropic super-hydrophobic plane
- Capillary Adhesion at the Nanometer Scale
- Attractive interaction and bridging transition between neutral colloidal particles due to preferential adsorption in a near-critical binary mixture
- Hydrodynamic interaction with super-hydrophobic surfaces
- Solvent mediated interactions close to fluid-fluid phase separation: microscopic treatment of bridging in a soft core fluid
- Capillary stress and structural relaxation in moist granular materials
- Effective pair interactions between colloidal particles at a nematic-isotropic interface
- Flow in channels with superhydrophobic trapezoidal textures
- Lateral and normal forces between patterned substrates induced by nematic fluctuations
- Polymer nano-doplets forming liquid bridges in chemically structured slit pores: A computer simulation
- Stability of Binary Mixtures in Electric Field Gradients
- Formation of capillary bridges in AFM-like geometry
- Bridging transitions and capillary forces for colloids in a slit
- The influence of line tension on the formation of liquid bridges in atomic force microscope-like geometry
- Solvation forces in Ising films with long-range boundary fields: density-matrix renormalization-group study
- Interactions between droplets in immiscible liquid suspensions and the influence of surfactants