Title:
Probing glassy states in binary mixtures of soft interpenetrable colloids
Languages of Item:
English
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. © 2011 IOP Publishing Ltd.
Authors:
E Stiakakis
B M Erwin
D Vlassopoulos
M Cloitre
A Munam
M Gauthier
H Iatrou
N Hadjichristidis
Journal:
JOURNAL OF PHYSICS : CONDENSED MATTER
Publisher:
IOP Publishing
Keywords:
Glass; Light scattering, Colloidal glass; Colloidal sphere; Dynamic light scattering measurement; Experimental evidence; Phenomenological analysis; Rich dynamics; Star polymers; State diagram, Binary mixtures
Main subject category:
Science
Official URL (Publisher):
DOI:
10.1088/0953-8984/23/23/234116
