Abstract
We present experimental evidence confirming the recently established rich dynamic statediagram of asymmetric binary mixtures of soft colloidal spheres. These mixtures consist ofglassy suspensions of large star polymers to which different small stars are added at varyingconcentrations. Using rheology and dynamic light scattering measurements along with asimple phenomenological analysis, we show the existence of re-entrance and multiple glassystates, which exhibit distinct features. Cooperative diffusion, as a probe for star arminterpenetration, is proven to be sensitive to the formation of the liquid pockets whichsignal the melting of the large-star-glass upon addition of small stars. These resultsprovide ample opportunities for tailoring the properties of soft colloidal glasses.
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