TY  - JOUR
AU  - Karina, Aigerim
AU  - Li, Hailong
AU  - Eklund, Tobias
AU  - Ladd-Parada, Marjorie
AU  - Massani, Bernhard
AU  - Filianina, Mariia
AU  - Kondedan, Neha
AU  - Rydh, Andreas
AU  - Holl, Klara
AU  - Trevorah, Ryan
AU  - Huotari, Simo
AU  - Bauer, Robert
AU  - Goy, Claudia
AU  - Striker, Nele
AU  - Dallari, Francesco
AU  - Westermeier, Fabian
AU  - Sprung, Michael
AU  - Lehmkühler, Felix
AU  - Amann-Winkel, Katrin
TI  - Multicomponent dynamics in amorphous ice studied using X-ray photon correlation spectroscopy at elevated pressure and cryogenic temperatures
JO  - Communications chemistry
VL  - 8
IS  - 1
SN  - 2399-3669
CY  - [London]
PB  - Macmillan Publishers Limited, part of Springer Nature
M1  - PUBDB-2025-01058
SP  - 82
PY  - 2025
AB  - Knowing the pressure dependence of glass forming liquids is important in various contexts. Here, we study the case of supercooled water, which has at least two different amorphous states with different densities. The pressure dependencies of the two glass transitions are predicted to show opposite behaviour, crossing in the P-T plane at elevated pressure. The experimental identification of the glass transition at elevated pressure and cryo-conditions is technically difficult. Moreover, in the case of amorphous ices, the glass transition is interrupted by crystallization, which makes it even more challenging. We show the feasibility of performing X-ray photon correlation spectroscopy experiments at elevated pressure using a diamond anvil cell at cryogenic temperatures. We observe two dynamic components when approaching the glass transition temperature. For high-density amorphous ice at a pressure of around (0.08 ± 0.02) GPa we determine the glass transition to be at higher temperatures compared to ambient conditions. 
LB  - PUB:(DE-HGF)16
C6  - 40091131
UR  - <Go to ISI:>//WOS:001445653700001
DO  - DOI:10.1038/s42004-025-01480-8
UR  - https://bib-pubdb1.desy.de/record/625242
ER  -