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Title The dielectric signature of glass density
Date 01.09.2017
Number 53216
Abstract At present, we are witnessing a renewed interest in the properties of densified glasses prepared by isobaric cooling of a liquid at elevated pressure. As high-pressure densification emerges as a promising approach in the development of glasses with customized features, understanding and controlling their unique properties represent a contemporary scientific and technological goal. The results presented herein indicate that the applied high-pressure preparation route leads to a glassy state with higher density (~1%) and a reduced free volume of about 7%. We show that these subtle structural changes remarkably influence the dielectric response and spectral features of ß-relaxation in etoricoxib glass. Our study, combining dynamical and structural techniques, reveal that ß-relaxation in etoricoxib is extremely sensitive to the variations in molecular packing and can be used to probe the changes in glass density. Such connection is technologically relevant and may advance further progress in the field.
URL http://dx.doi.org/10.1063/1.4990411
Publisher Applied Physics Letters
Identifier 0
Citation Applied Physics Letters 111 (2017) ID121902
DOI http://dx.doi.org/10.1063/1.4990411
Authors Rams-Baron, M. ; Wojnarowska, Z. ; Knapil-Kowalczuk, J. ; Jurkiewicz, K. ; burian, A. ; Wojtyniak, M. ; Pionteck, J. ; Jaworska, M. ; Rodríguez-Tinoco, C. ; Paluch, M.
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