Microstructure and yielding of capillary force induced gel

Sheared force networks: anisotropies, yielding, and geometry.

A scenario for the yielding of granular matter is presented by considering the ensemble of force networks for a given contact network and applied shear stress tau. As tau is increased, the probability distribution of contact forces becomes highly anisotropic, the difference between average contact forces along minor and major axes grows, and the allowed networks span a shrinking subspace of all...

Capillary Gel Electrophoresis

Gel Electrophoresis in Capillary Electrophoresis

The discovery that antigen}antibody interaction could be produced not only in liquids, but also on gel media, such as agar or agarose gels, with the formation of insoluble immunoprecipitates, opened the door to the development of the gel diffusion techniques for immunoprecipitation analysis. The Rrst of these techniques, known as double diffusion, was introduced by Ouchterlony in 1948. In this ...

Microstructure and Elastic Properties of Colloidal Gel Foams.

Colloidal gel foams are composed of a continuous, attractive particle network that surrounds and interconnects dispersed bubbles. Here, we investigate their stability, morphology, and elasticity as a function of foaming intensity, surfactant concentration and hydrophobicity, pH, and colloid volume fraction. Upon optimizing these parameters, highly stable colloidal gel foams are created. Within ...

Supplementary information: Effect of electrolyte on the microstructure and yielding of aqueous dispersions of colloidal clay