title: Probing glassy states in binary mixtures of soft interpenetrable colloids.
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.
authors: FORTH, Institute of Electronic Structure and Laser, GR-71110 Heraklion, Crete, Greece.
authors: E
authors: E
authors: Stiakakis
authors: B M
authors: BM
authors: Erwin
authors: D
authors: D
authors: Vlassopoulos
authors: M
authors: M
authors: Cloitre
authors: A
authors: A
authors: Munam
authors: M
authors: M
authors: Gauthier
authors: H
authors: H
authors: Iatrou
authors: N
authors: N
authors: Hadjichristidis