title: Short-Time Glassy Dynamics in Viscous Protein Solutions with Competing Interactions.
abstract: The 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.
authors.affiliation: Center for Neutron Science, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, USA.
authors.forename: P Douglas
authors.initials: PD
authors.lastname: Godfrin
authors.affiliation: Polymers and Complex Fluids Group, NIST, Gaithersburg, Maryland 20899, USA.
authors.forename: Steven D
authors.initials: SD
authors.lastname: Hudson
authors.affiliation: Center for Nanophase Materials and Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors.forename: Kunlun
authors.initials: K
authors.lastname: Hong
authors.affiliation: Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042 Grenoble cedex 9, France.
authors.forename: Lionel
authors.initials: L
authors.lastname: Porcar
authors.affiliation: Institut Laue-Langevin, 71 avenue des Martyrs, CS 20156, 38042 Grenoble cedex 9, France.
authors.forename: Peter
authors.initials: P
authors.lastname: Falus
authors.affiliation: Center for Neutron Science, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, USA.
authors.forename: Norman J
authors.initials: NJ
authors.lastname: Wagner
authors.affiliation: Center for Neutron Science, Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, Delaware 19716, USA.|Center for Neutron Research, NIST, Gaithersburg, Maryland 20899, USA.
authors.forename: Yun
authors.initials: Y
authors.lastname: Liu