A new treatment of the phase behaviour a colloid + nonadsorbing polymer mixture is described. The calculated diagrams show marked partitioning between coexisting phases, an effect not considered in usual effective-potential approaches to this problem. We also predict that under certain conditions area three-phase coexistence should appear diagram.

We studied the free fluid-fluid interface in a phase-separated colloid-polymer dispersion with laser scanning confocal microscopy and directly observed thermally induced capillary waves at real space. Experimental results for static dynamic correlation functions validate wave model down to almost particle level. The ultralow interfacial tension, length, time are found be agreement independent measurements. Furthermore, we show that induce spontaneous breakup of thin liquid films thus key...

We study droplet coalescence in a molecular system with variable viscosity and colloid-polymer mixture an ultralow surface tension. When either the is large or tension small enough, we observe that opening of liquid bridge initially proceeds at constant speed set by capillary velocity. In first show inertial effects become dominant Reynolds number about 1.5+/- 0.5 neck then grows as square root time. second decreasing factor 10(5) opens way to more complete understanding hydrodynamics involved.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of electrostatic interaction on the liquid crystal phase transition in solutions rodlike polyelectrolytesA. Stroobants, H. N. W. Lekkerkerker, and T. OdijkCite this: Macromolecules 1986, 19, 8, 2232–2238Publication Date (Print):August 1, 1986Publication History Published online1 May 2002Published inissue 1 August 1986https://pubs.acs.org/doi/10.1021/ma00162a020https://doi.org/10.1021/ma00162a020research-articleACS PublicationsRequest reuse...

The rheological properties of colloidal suspensions spheres, rods, and disks have been studied using a mesoscopic simulation technique, known as dissipative particle dynamics (DPD). In DPD, suspension is modeled system large particles in liquid interacting point particles. For the calculation hydrodynamic interactions, this method computationally more efficient than conventional techniques continuum model for solvent. Applying steady-shear rate to particulate suspensions, we measured...

The Onsager theory for the isotropic–anisotropic phase separation in a solution of rodlike particles is extended to case mixtures such with different lengths. concentration, composition, order parameters, and orientation dependent thermodynamic quantities coexisting phases are calculated mixture rods two lengths length ratios. It found that there significantly higher mole fraction longer anisotropic than isotropic phase. parameter one component case, whereas shorter first increases then...

The phase diagram of a system hard parallel spherocylinders with length-to-width ratios L/D between 0 and \ensuremath{\infty} is investigated by Monte Carlo simulation. In addition to low-density nematic high-density crystalline phase, two phases partial translational order are observed, viz., smectic columnar phase. By computing the absolute free energy all phases, their range stability coexistence points determined. For exceeding 0.5, stable formed at densities well below thermodynamic...

A novel model system of hard colloidal platelets was observed to phase-separate into an isotropic and a liquid crystalline phase. Polarization microscopy revealed that the phase nematic origin. With such orientational ordering in suspensions platelike particles already being predicted 1940s by Onsager's theory corroborated more recently computer simulations, direct comparison with experimental observations has now become possible. Furthermore, apparently unhindered formation macroscopic...

It is shown that strongly reducing the range of attractions a simple fluid will transform its phase diagram from usual type, with fluid-fluid critical point and fluid-fluid-solid triple point, into fluid-solid mirror image, solid-solid solid-solid-fluid point. This scenario could be relevance to behavior colloidal dispersions.

The pretransitional fluctuations of the Rayleigh-Benard or convective instability are obtained for a binary mixture and compared to one component case. There now enhanced concentration although velocity critically enhanced, they weaker by factor D/χ. behaviour critical (soft) mode is in order parameter classical analysis phase transition. region around where treatment invalid increased case (χ/D)1/2 over that pure fluid instability.

A review is given of the field mineral colloidal liquid crystals: crystal phases formed by individual particles within suspensions. Starting from their discovery in 1920s, we discuss developments on levels both fundamentals and applications. We conclude highlighting some promising results recent years, which may point way towards future developments.

We examine the influence of attractive interactions on phase behavior rodlike colloids. model particles by spherocylinders, for which diagram, in absence attraction, is known arbitrary aspect ratio. consider case that attraction due to depletion forces caused addition nonadsorbing polymer. The range this determined size If radius gyration polymer small compared diameter rods, we can polymer-induced a suitable generalization square-well spherical particles. However, longer ranged attractions,...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsotropic-nematic phase separation of a dispersion organophilic boehmite rodsP. A. Buining and H. N. W. LekkerkerkerCite this: J. Phys. Chem. 1993, 97, 44, 11510–11516Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://pubs.acs.org/doi/10.1021/j100146a027https://doi.org/10.1021/j100146a027research-articleACS PublicationsRequest reuse permissionsArticle...

The electro-optical response of colloidal dispersions rod-shaped gold particles is studied for various aspect ratios (2.6 < L/d 49; d = 15 nm) by monitoring the absorbance spectra in visible wavelength regime. strongly depend on degree orientational order rods and direction polarization incident light with respect to applied electric field. From change transverse resonance effect deduced: at low field strengths a linear dependence squared strength observed, sufficiently high saturation...

Binary mixtures of suspended, nearly hard-sphere, sterically stabilized colloidal silica particles diameter ratio 6 were observed to phase-separate at comparable volume fractions the two particle species. The occurrence phase separation as a function concentrations was studied visually and by small-angle light scattering. results support recent predictions Biben Hansen.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase Behavior of Aqueous Dispersions Colloidal Boehmite RodsP. A. Buining, P. Philipse, and H. N. W. LekkerkerkerCite this: Langmuir 1994, 10, 7, 2106–2114Publication Date (Print):July 1, 1994Publication History Published online1 May 2002Published inissue 1 July 1994https://doi.org/10.1021/la00019a016RIGHTS & PERMISSIONSArticle Views894Altmetric-Citations128LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum full text article...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheory of the isotropic-nematic-nematic phase separation for a solution bidisperse rodlike particlesG. J. Vroege and H. N. W. LekkerkerkerCite this: Phys. Chem. 1993, 97, 14, 3601–3605Publication Date (Print):April 1, 1993Publication History Published online1 May 2002Published inissue 1 April 1993https://doi.org/10.1021/j100116a026RIGHTS & PERMISSIONSArticle Views568Altmetric-Citations121LEARN ABOUT THESE METRICSArticle Views are COUNTER-compliant...