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research
Glassy States in Asymmetric Mixtures of Soft and Hard Colloids
Authors
Manuel Camargo
Barbara Capone
+8 more
Mario Gauthier
Christos N. Likos
John Marakis
Daniela Marzi
Firmin Moingeon
Abdul Munam
Domenico Truzzolillo
Dimitris Vlassopoulos
Publication date
11 November 2013
Publisher
'American Physical Society (APS)'
Doi
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Abstract
© 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.111.208301By 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.This work has been supported by the EU (ITN-COMPLOIDS Grant No. 234810) and by the J. S. Latsis Foundation (Grant No. 0839-2012)
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Last time updated on 01/04/2019