Nucleation and Growth of the Supercooled Liquid Phase Control Glass Transition in Bulk Ultrastable Glasses

A. Vila-Costa, J. Ràfols-Ribé, M. González-Silveira, A. F. Lopeandia, Ll Abad-Muñoz, J. Rodríguez-Viejo

Producción científica: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva

16 Citas (Scopus)

Resumen

We report the anomalous bulk transformation of vapor deposited stable glasses into the liquid state. The transformation proceeds through two competing parallel processes: partial rejuvenation of the stable glass and nucleation and growth of liquid patches within the glass. The kinetics of the transformation extracted from heat capacity curves after isothermal runs is dominated by the heterogeneous nucleation and growth process that initiates at preexisting seeds and propagates radially at a velocity proportional to the alpha relaxation time. Remarkably, the distance between the activation seeds is independent of temperature within experimental uncertainty and amounts to several micrometers, a value in close agreement with the crossover length for TPD glasses. We speculate the initiation sites for the transformation of the glass into the supercooled liquid are localized regions of lower stability (or density).
Idioma originalInglés
Número de artículo076002
Páginas (desde-hasta)076002
Número de páginas5
PublicaciónPhysical Review Letters
Volumen124
N.º7
DOI
EstadoPublicada - 21 feb 2020

Huella

Profundice en los temas de investigación de 'Nucleation and Growth of the Supercooled Liquid Phase Control Glass Transition in Bulk Ultrastable Glasses'. En conjunto forman una huella única.

Citar esto