Glycerol glass under pressure

ORAL

Abstract

Glycerol is a medium fragility glass-forming fluid widely used in research applications and as a cryoprotectant. However, numerous questions remain concerning its behavior on compression through its high-pressure glassy state. We report high-pressure measurements of the elastic properties, relaxation times, photoelastic constants, and Cauchy-like relations of glycerol to 14 GPa by Brillouin scattering. In addition, the boson peak was measured to 10 GPa by Raman scattering. Using direct volumetric measurements, we also determine the pressure dependence of the Cp/Cv ratio. The combined results provide a deeper analysis into the thermodynamics of this glass forming material to be inspected.

**This research was supported by NSF (DMR-1933622), DOE/NNSA (DE-NA0003975) and the US Department of Defense through the Educational and Research Training Collaborative at UIC, under award HQ 00342010037

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Publication: Vallero, C., Aihaiti, M., Tkachev, S., Chariton, S., Prakapenka, V., Kojima, S., SA Gramsch, & Hemley, R. (2023). Pressure Dependence of Acoustic Properties in Glycerol by Brillouin Scattering. To be submitted soon

Presenters

  • Cade M Vallero

    • University of Illinois at Chicago

Authors

  • Cade M Vallero

    • University of Illinois at Chicago

  • Muhtar Ahart

    • University of Illinois at Chicago
    • Carnegie Inst of Washington
    • University of Illinois Chicago
    • Department of Physics, University of Illinois at Chicago

  • Seiji Kojima

    • University of Tsukuba

  • Russell J Hemley

    • University of Illinois at Chicago
    • University of Illinois Chicago
    • Departments of Physics, Chemistry, and Earth and Environmental Sciences, University of Illinois Chicago
    • Department of Physics and Chemistry, University of Illinois Chicago, 845, W. Taylor Street, Chicago, IL 60607
    • Departments of Physics, Chemistry, and Earth and Environmental Sciences, University of Illinois at Chicago