| We evaluate the elasticity of arrested short-ranged attractive colloids by combining an analytically solvable elastic model with a hierarchical arrest scheme. This new approach allows us to discriminate the microscopic (primary particle-level) from the mesoscopic (cluster-level) contribution to the macroscopic shear modulus. The results quantitatively predict experimental data in a wide range of volume fractions and indicate in which cases the relevant contribution is due to mesoscopic structures. On this basis we propose that different arrested states of short-ranged attractive colloids can be meaningfully distinguished as homogeneous or heterogeneous colloidal glasses in terms of the length scale which controls their elastic behavior.
for LaTeX users @article{AZaccone2009-103,
author = {A. Zaccone and H. Wu and E. Del Gado},
title = {Elasticity of Arrested Short-Ranged Attractive Colloids: Homogeneous and Heterogeneous Glasses},
journal = {Phys. Rev. Lett.},
volume = {103},
pages = {208301},
year = {2009}
}
\bibitem{AZaccone2009-103} A. Zaccone, H. Wu, E. Del Gado,
Elasticity of Arrested Short-Ranged Attractive Colloids: Homogeneous and Heterogeneous Glasses,
Phys. Rev. Lett. {\bf 103} (2009) 208301.AZaccone2009-103
A. Zaccone, H. Wu, E. Del Gado
Elasticity of Arrested Short-Ranged Attractive Colloids: Homogeneous and Heterogeneous Glasses
Phys. Rev. Lett.,103,2009,208301 |
mk@mat.ethz.ch
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