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Interfacial Properties of Fluids Exhibiting Liquid Polyamorphism and Water-Like Anomalies
Thomas J Longo1, Sergey V Buldyrev2,3, Mikhail A Anisimov1,4
1Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, United States.
The Journal of Physical Chemistry. B
|March 23, 2023
Summary
Molecular interconversion may cause liquid polyamorphism. This study shows interconversion dramatically affects interfacial properties, leading to unusual surface tension and interfacial thickness in fluids exhibiting liquid polyamorphism.
Area of Science:
- Physical Chemistry
- Materials Science
- Thermodynamics
Background:
- Liquid polyamorphism, the existence of multiple amorphous states in a single-component substance, is a phenomenon of significant scientific interest.
- The underlying mechanisms, such as molecular or supramolecular interconversion, are hypothesized to drive this behavior.
Purpose of the Study:
- To investigate the impact of molecular interconversion on the interfacial properties of fluids.
- To explore thermodynamic scenarios for substances exhibiting liquid polyamorphism and water-like anomalies.
Main Methods:
- Utilized a simple microscopic model involving a compressible binary lattice to simulate interconversion.
- Analyzed the effects of this interconversion on liquid-vapor interfacial properties.
Main Results:
- Observed that liquid-vapor surface tension exhibits either an inflection point or two extrema with changing temperature.
- Demonstrated anomalous behavior in interfacial thickness and a shift in concentration profiles relative to density profiles.
Conclusions:
- Molecular or supramolecular interconversion significantly influences interfacial properties in systems exhibiting liquid polyamorphism.
- The findings provide insights into the thermodynamic behavior and interfacial characteristics of anomalous fluids.
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