The Boson peak in confined water: An experimental investigation of the liquid-liquid phase transition hypothesis
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Author(s)
Mallamace, Francesco
Corsaro, Carmelo
Mallamace, Domenico
Wang, Zhe
Chen, Sow-Hsin
Date Issued
December 2015
Journal
Frontiers of Physics
Publisher
Springer Nature
Citation
Mallamace, Francesco, Carmelo Corsaro, Domenico Mallamace, Zhe Wang, and Sow-Hsin Chen. "The Boson peak in confined water: An experimental investigation of the liquid-liquid phase transition hypothesis." Frontiers of Physics. 2015 Dec 05;10(5):106103.
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Final published version
Abstract
The Boson peak (BP) of deeply cooled confined water is studied by using inelastic neutron scattering (INS) in a large interval of the (P, T) phase plane. By taking into account the different behavior of such a collective vibrational mode in both strong and fragile glasses as well as in glass-forming materials, we were able to determine the Widom line that characterizes supercooled bulk water within the frame of the liquid-liquid phase transition (LLPT) hypothesis. The peak frequency and width of the BP correlated with the water polymorphism of the LLPT scenario, allowing us to distinguish the “low-density liquid” (LDL) and “high-density liquid” (HDL) phases in deeply cooled bulk water.Moreover, the BP properties afford a further confirmation of theWidom line temperatue T[subscript W] as the (P, T) locus in which the local structure of water transforms from a predominately LDL form to a predominately HDL form.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
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DOI of Published Version
https://doi.org/10.1007/s11467-015-0487-8
