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arXiv · 2212.10205

Interfacial Properties of Fluids Exhibiting Liquid Polyamorphism and Water-Like Anomalies

Thomas J. Longo·Sergey V. Buldyrev·Mikhail A. Anisimov·Frédéric Caupin
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Abstract

It has been hypothesized that liquid polyamorphism, the existence of multiple amorphous states in a single component substance, may be caused by molecular or supramolecular interconversion. A simple microscopic model [Caupin and Anisimov, Phys. Rev. Lett., 127, 185701, (2021)] introduces interconversion in a compressible binary lattice to generate various thermodynamic scenarios for fluids that exhibit liquid polyamorphism and/or water-like anomalies. Using this model, we demonstrate the dramatic effects of interconversion on the interfacial properties. In particular, we find that the liquid-vapor surface tension exhibits either an inflection point or two extrema in its temperature dependence. Correspondingly, we observe anomalous behavior of the interfacial thickness and a significant shift in the location of the concentration profile with respect to the location of the density profile.

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Thomas J. Longo, Sergey V. Buldyrev, Mikhail A. Anisimov, Frédéric Caupin. 2023-03-09. Interfacial Properties of Fluids Exhibiting Liquid Polyamorphism and Water-Like Anomalies. https://doi.org/10.1021/acs.jpcb.2c08901

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