Glassy States in Asymmetric Mixtures of Soft and Hard Colloids
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Date
2013-11-14
Authors
Truzzolillo, Domenico
Marzi, Daniela
Marakis, John
Capone, Barbara
Camargo, Manuel
Munam, Abdul
Moingeon, Firmin
Gauthier, Mario
Likos, Christos N.
Vlassopoulos, Dimitris
Journal Title
Journal ISSN
Volume Title
Publisher
APS Physics
Abstract
By employing rheological experiments, mode coupling theory, and computer simulations based on realistic coarse-grained models, we investigate the effects of small, hard colloids on the glassy states formed by large, soft colloids. Multiarm star polymers mimic hard and soft colloids by appropriately varying the number and size of their arms. The addition of hard colloids leads, depending on their concentration, to either melting of the soft glass or the emergence of two distinct glassy states. We explain our findings by depletion of the colloids adjacent to the stars, which leads to an arrested phase separation when the repulsive glass line meets the demixing binodal. The parameter-free agreement between experiment, theory, and simulations suggests the generic nature of our results and opens the route for designing soft-hard colloidal composites with tunable rheology.
Description
© 2013 American Physical Society, available at: Truzzolillo, D., Marzi, D., Marakis, J., Capone, B., Camargo, M., Munam, A., … Vlassopoulos, D. (2013). Glassy States in Asymmetric Mixtures of Soft and Hard Colloids. Physical Review Letters, 111(20). https://doi.org/10.1103/PhysRevLett.111.208301
Keywords
Star Polymers, Attraction, Simulation, Particles, Gelation, System, Model