Structural signal of a dynamic glass transition

Sudeshna Chattopadhyay*, Ahmet Uysal, Benjamin Stripe, Guennadi Evmenenko, Steven Ehrlich, Evguenia A. Karapetrova, Pulak Dutta

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Pentaphenyl trimethyl trisiloxane is an isotropic liquid at room temperature with a dynamic glass transition at 224 K. Using x-ray reflectivity, we see surface density oscillations (layers) develop below 285 K, similar to those seen in other metallic and dielectric liquids and in computer simulations. The layering threshold is ∼0.23 times the liquid-gas critical temperature. Upon cooling further, there is a sharp increase at 224 K in the persistence of the surface layers into the bulk material, i.e., an apparently discontinuous change in static structure at the glass transition.

Original languageEnglish (US)
Article number175701
JournalPhysical review letters
Volume103
Issue number17
DOIs
StatePublished - Oct 22 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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