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Glassy States in Asymmetric Mixtures of Soft and Hard Colloids

Autor(en)
Domenico Truzzolillo, Daniela Marzi, John Marakis, Barbara Capone, Manuel Camargo, Abdul Munam, Firmin Moingeon, Mario Gauthier, Christos N. Likos, Dimitris Vlassopoulos
Abstrakt

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.

Organisation(en)
Computergestützte Physik und Physik der Weichen Materie
Externe Organisation(en)
University of Crete, Université Montpellier 2, Laboratoire Charles Coulomb (L2C) CNRS, UMR 5221, Universidad Antonio Nariño, University of Waterloo (UW)
Journal
Physical Review Letters
Band
111
Anzahl der Seiten
5
ISSN
0031-9007
DOI
https://doi.org/10.1103/PhysRevLett.111.208301
Publikationsdatum
11-2013
Peer-reviewed
Ja
ÖFOS 2012
103023 Polymerphysik
Schlagwörter
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/a65a57d9-a13d-4b44-90cf-81974e37e332