Browsing by Author "Porcar, Lionel"
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Item Short-Time Glassy Dynamics in Viscous Protein Solutions with Competing Interactions(American Physical Society, 2015-11-24) Godfrin, P. Douglas; Hudson, Steven D.; Hong, Kunlun; Porcar, Lionel; Falus, Peter; Wagner, Norman J.; Liu, Yun; P. Douglas Godfrin, Steven D. Hudson, Kunlun Hong, Lionel Porcar, Peter Falus, Norman J. Wagner, and Yun Liu; Godfrin, P. Douglas; Wagner, Norman J.; Liu, YunThe glass transition of colloidal dispersions interacting with both a short-ranged attraction and long-ranged repulsion is studied using highly purified lysozyme solutions. Newtonian liquid behavior is observed at all conditions while measurements of the dynamics in the short-time limit show features typical of glassy colloidal systems at high protein concentrations. This interesting behavior is due to the competition of the attraction and repulsion that produces a heterogeneous microstructure only at intermediate range length scales. The results demonstrate that theories for the macroscopic properties of systems with competing interactions need to include intermediate range order.