title: Stokes-Einstein relation in supercooled aqueous solutions of glycerol.
abstract: The diffusion of glycerol molecules decreases with decreasing temperature as its viscosity increases in a manner simply described by the Stokes-Einstein relation. Approaching the glass transition, this relation breaks down as it does with a number of other pure liquid glass formers. We have measured the diffusion coefficient for binary mixtures of glycerol and water and find that the Stokes-Einstein relation is restored with increasing water concentration. Our comparison with theory suggests that adding water postpones the formation of frustration domains.
authors.affiliation: Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA.
authors.forename: Bo
authors.initials: B
authors.lastname: Chen
authors.forename: E E
authors.initials: EE
authors.lastname: Sigmund
authors.forename: W P
authors.initials: WP
authors.lastname: Halperin