Why is surface diffusion the same in ultrastable, ordinary, aged, and ultrathin molecular glasses?

Physical Chemistry Chemical Physics : PCCP
K L NgaiCristian Rodríguez-Tinoco

Abstract

Recently Fakhraai and coworkers measured surface diffusion in ultrastable glass produced by vapor deposition, ordinary glass with and without physical aging, and ultrathin films of the same molecular glass-former, N,N'-bis(3-methylphenyl)-N,N'-diphenylbenzidine (TPD). Diffusion on the surfaces of all these glasses is greatly enhanced compared with the bulk diffusion similar to that previously found by others, but remarkably the surface diffusion coefficients DS measured are practically the same. The observed independence of DS from changes of structural α-relaxation due to densification or finite-size effect has an impact on the current understanding of the physical origin of enhanced surface diffusion. We have demonstrated before and also here that the primitive relaxation time τ0 of the coupling model, or its analogue τβ, the Johari-Goldstein β-relaxation, can explain quantitatively the enhancement found in ordinary glasses. In this paper, we assemble together considerable experimental evidence to show that the changes in τβ and τ0 of ultrastable glasses, aged ordinary glasses, and ultrathin-films are all insignificant when compared with ordinary glasses. Thus, in the context of the explanation of the enhanced surface diffusi...Continue Reading

References

Oct 1, 1996·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·K Y Tsang, K L Ngai
Oct 4, 2000·Physical Review Letters·S H AnastasiadisE P Giannelis
Dec 12, 2001·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·K FukaoH Miyaji
Apr 24, 2002·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·K L Ngai, K Y Tsang
Jul 23, 2004·The Journal of Chemical Physics·K L Ngai, M Paluch
Dec 13, 2006·Science·Stephen F SwallenSushil Satija
Feb 2, 2008·Science·Z Fakhraai, J A Forrest
Dec 24, 2008·The Journal of Chemical Physics·Jacob D Stevenson, Peter G Wolynes
Mar 5, 2009·Physical Review Letters·R Casalini, C M Roland
Aug 12, 2009·Proceedings of the National Academy of Sciences of the United States of America·Kevin J DawsonM D Ediger
Oct 15, 2010·Physical Chemistry Chemical Physics : PCCP·Edgar Leon-GutierrezJavier Rodríguez-Viejo
Jul 21, 2011·Physical Review Letters·L ZhuL Yu
Dec 12, 2012·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·S CapaccioliD Prevosto
Jul 9, 2013·The Journal of Physical Chemistry. a·Caleb W Brian, Lian Yu
Sep 4, 2015·The Journal of Chemical Physics·Katherine R WhitakerM D Ediger
Sep 17, 2015·The Journal of Chemical Physics·Xiangqian LiSimone Capaccioli
Nov 14, 2015·Physical Review Letters·H B YuR Richert
Jan 3, 2016·The Journal of Chemical Physics·Stephen Mirigian, Kenneth S Schweizer
Oct 4, 2016·Scientific Reports·C Rodríguez-TinocoJ Rodríguez-Viejo
Feb 25, 2017·Physical Review Letters·Yue Zhang, Zahra Fakhraai
Apr 5, 2017·Proceedings of the National Academy of Sciences of the United States of America·Yue Zhang, Zahra Fakhraai

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Citations

Jun 5, 2018·Physical Chemistry Chemical Physics : PCCP·Cristian Rodríguez-TinocoMarian Paluch
Oct 31, 2018·Physical Chemistry Chemical Physics : PCCP·K L NgaiCristian Rodríguez-Tinoco
Dec 12, 2019·Physical Chemistry Chemical Physics : PCCP·K L NgaiA Loidl
Jan 24, 2018·Physical Chemistry Chemical Physics : PCCP·Cristian Rodríguez-TinocoMarian Paluch

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