title: Dielectric secondary relaxation of water in aqueous binary glass-formers.
abstract: Glassy aqueous binary mixtures generally exhibit a water induced dielectric relaxation. The characteristic time-scale of this relaxation follows an Arrhenius temperature dependence with a nearly universal activation energy. We here demonstrate for a series of model aqueous mixtures that the relaxation time also follows a remarkably general exponential dependence on the weight fraction of water. By comparison to literature data we show that this behaviour is shared by a wide range of molecular systems. Neither the detailed nature of the water molecules' glassy environment nor the details of the route of formation of the glassy state has a significant effect on the observed behaviour.
authors.affiliation: Department of Applied Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden. johan.sjostrom@chalmers.se
authors.forename: Johan
authors.initials: J
authors.lastname: Sjöström
authors.forename: Johan
authors.initials: J
authors.lastname: Mattsson
authors.forename: Rikard
authors.initials: R
authors.lastname: Bergman
authors.forename: Erik
authors.initials: E
authors.lastname: Johansson
authors.forename: Karin
authors.initials: K
authors.lastname: Josefsson
authors.forename: David
authors.initials: D
authors.lastname: Svantesson
authors.forename: Jan
authors.initials: J
authors.lastname: Swenson
mesh_terms: D017097:Electric Impedance; D005898:Glass / Q000737:chemistry*; D006860:Hydrogen Bonding; D013696:Temperature; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water