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There is a growing interest in studying mobilitiy at the surface of low molecular weight glass formers. This Hot Paper describes nanoparticle embedding studies in the molecular glass former 1,3-bis-(1-naphthyl)-5-(2-naphthyl)benzene. By measuring both surface and bulk dynamics, the researchers provide a quantitative measure for the enhancement of surface dynamics relative to the bulk.
Comparing surface and bulk flow of a molecular glass former
C. R. Daley, Z. Fakhraai, M. D. Ediger and J. A. Forrest
Soft Matter, 2012, 8, 2206-2212