Probing glassy states in binary mixtures of soft interpenetrable colloids

E. Stiakakis, B. M. Erwin, D. Vlassopoulos, M. Cloitre, A. Munam, M. Gauthier, H. Iatrou, N. Hadjichristidis

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Abstract

We present experimental evidence confirming the recently established rich dynamic state diagram of asymmetric binary mixtures of soft colloidal spheres. These mixtures consist of glassy suspensions of large star polymers to which different small stars are added at varying concentrations. Using rheology and dynamic light scattering measurements along with a simple phenomenological analysis, we show the existence of re-entrance and multiple glassy states, which exhibit distinct features. Cooperative diffusion, as a probe for star arm interpenetration, is proven to be sensitive to the formation of the liquid pockets which signal the melting of the large-star-glass upon addition of small stars. These results provide ample opportunities for tailoring the properties of soft colloidal glasses.

Original languageEnglish
Article number234116
JournalJournal of Physics: Condensed Matter
Volume23
Issue number23
DOIs
Publication statusPublished - 2011

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Science(all)

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    Stiakakis, E., Erwin, B. M., Vlassopoulos, D., Cloitre, M., Munam, A., Gauthier, M., Iatrou, H., & Hadjichristidis, N. (2011). Probing glassy states in binary mixtures of soft interpenetrable colloids. Journal of Physics: Condensed Matter, 23(23), [234116]. https://doi.org/10.1088/0953-8984/23/23/234116