Phys. Rev. Lett. 96, 145502 (2006) [4 pages]Stokes-Einstein Relation in Supercooled Aqueous Solutions of GlycerolReceived 19 December 2005; published 11 April 2006 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. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.145502
DOI:
10.1103/PhysRevLett.96.145502
PACS:
66.10.Cb, 61.43.Fs, 76.60.−k
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.