Stokes-Einstein Relation in Supercooled Aqueous Solutions of Glycerol

Bo Chen, E. E. Sigmund, and W. P. Halperin
Phys. Rev. Lett. 96, 145502 – Published 11 April 2006

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.

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  • Received 19 December 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.145502

©2006 American Physical Society

Authors & Affiliations

Bo Chen, E. E. Sigmund*, and W. P. Halperin

  • Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA

  • *Present address: Schlumberger-Doll Research, Ridgefield, CT 06877, USA.

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Issue

Vol. 96, Iss. 14 — 14 April 2006

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