George Petekidis

TL;DR: Investigation of the yielding behaviour of frustrated colloid–polymer systems with equal attraction strength and range indicated distinct shear rate regimes: At steady state, low and intermediate shear rates create denser or smaller flowing clusters, whereas high rates may lead to complete break-up into independent particles.

TL;DR: In this paper, the authors report a number of experiments, mainly rheological measurements, examining the yielding behavior of colloidal glasses with hard-sphere interaction plus a short-range attraction.

TL;DR: It is reported on hard-sphere colloidal glasses that show a type of shear banding hitherto unobserved in soft glasses that relates this to an instability due to shear-concentration coupling, a mechanism previously thought unimportant in these materials.

TL;DR: In this paper, the authors studied yielding in two kinds of colloidal glasses: hard spheres at high concentrations without and with a short-range interparticle attraction induced by adding non-adsorbing polymer.

TL;DR: In this article, the effects of particle softness and the role of the outer shell mechanics on the linear viscoelasticity and yielding behaviour of colloidal glasses are critically assessed using three different model colloidal particles: (i) sterically stabilized PMMA particles with model hard sphere interactions, (ii) core-shell microgels with a deformable PNIPAM outer shell and (iii) ultra-soft star-like micelles with interpenetrable multi-arms.