Ultra-slow dynamics in low density amorphous ice revealed by deuteron NMR: indication of a glass transition
Literature Information
Florian Löw, Katrin Amann-Winkel, Thomas Loerting, Franz Fujara, Burkhard Geil
The postulated glass–liquid transition of low density amorphous ice (LDA) is investigated with deuteron NMR stimulated echo experiments. Such experiments give access to ultra-slow reorientations of water molecules on time scales expected for structural relaxation of glass formers close to the glass–liquid transition temperature. An involved data analysis is necessary to account for signal contributions originating from a gradual crystallization to cubic ice. Even if some ambiguities remain, our findings support the view that pressure amorphized LDA ices are of glassy nature and undergo a glass–liquid transition before crystallization.
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