TY - JOUR
T1 - Structural signal of a dynamic glass transition
AU - Chattopadhyay, Sudeshna
AU - Uysal, Ahmet
AU - Stripe, Benjamin
AU - Evmenenko, Guennadi
AU - Ehrlich, Steven
AU - Karapetrova, Evguenia A.
AU - Dutta, Pulak
PY - 2009/10/22
Y1 - 2009/10/22
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.103.175701
DO - 10.1103/PhysRevLett.103.175701
M3 - Article
C2 - 19905770
AN - SCOPUS:70350405082
SN - 0031-9007
VL - 103
JO - Physical review letters
JF - Physical review letters
IS - 17
M1 - 175701
ER -