Yielding of colloidal glasses

K. N. Pham; G. Petekidis; D. Vlassopoulos; S. U. Egelhaaf; P. N. Pusey; W. C. K. Poon

doi:10.1209/epl/i2006-10156-y

All issues

Volume 75 / No 4 (August 2006)

Europhys. Lett., 75 4 (2006) 624-630

Abstract

Issue		Europhys. Lett. Volume 75, Number 4, August 2006


Page(s)		624 - 630
Section		Interdisciplinary physics and related areas of science and technology
DOI		https://doi.org/10.1209/epl/i2006-10156-y
Published online		12 July 2006

Europhys. Lett., 75 (4), pp. 624-630 (2006)

Yielding of colloidal glasses

K. N. Pham¹, G. Petekidis²^,3, D. Vlassopoulos²^,3, S. U. Egelhaaf¹, P. N. Pusey¹ and W. C. K. Poon¹

¹ SUPA, School of Physics, University of Edinburgh Mayfield Road, Edinburgh EH9 3JZ, UK
² Institute of Electronic Structure and Laser-FORTH PO Box 1527, Heraklion 71110, Crete, Greece
³ University of Crete, Department of Materials Science and Technology Heraklion, Crete, Greece

Received: 10 March 2006
Accepted: 29 June 2006

Abstract

We 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. Our oscillatory shear and step strain measurements reveal single and two-step yielding in these two kinds of glasses, respectively. This finding is interpreted in terms of a simple picture: the breaking of local topological constraints (cages) and the breaking of nearest-neighbour bonds.

PACS: 82.70.Dd – Colloids / 83.50.-v – Deformation and flow / 83.80.Hj – Suspensions, dispersions, pastes, slurries, colloids

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