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In Situ Characterization of Boehmite Particles in Water Using Liquid SEM
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Water Is a Cagey Liquid.

Tomaz Urbic1, Ken A Dill2

  • 1Faculty of Chemistry and Chemical Technology , University of Ljubljana , Večna pot 113 , Ljubljana SI-1000 , Slovenia.

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|November 22, 2018
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Summary
This summary is machine-generated.

A new statistical mechanical model reveals how water's hydrogen bonds (HB) and Lennard-Jones (LJ) interactions dictate its physical properties. This analytical model, CageWater, accurately predicts water's behavior and offers insights into its anomalous characteristics.

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Area of Science:

  • Physical Chemistry
  • Statistical Mechanics
  • Condensed Matter Physics

Background:

  • Liquid water's physical properties remain incompletely understood.
  • Existing models struggle to fully explain water's anomalous behavior and structure-property relationships.

Purpose of the Study:

  • To develop a predictive statistical mechanical model for liquid water.
  • To elucidate the molecular mechanisms governing water's energetic, volumetric, and anomalous properties.
  • To challenge the "2-density liquid" paradigm of water structure.

Main Methods:

  • Introduction of the analytical CageWater model.
  • Incorporation of hydrogen-bonding (HB) and Lennard-Jones (LJ) interactions.
  • Validation against known energetic, volumetric, and anomalous properties of water.

Main Results:

  • The CageWater model accurately predicts water's physical properties.
  • Identified a novel antagonism: water-water pair HBs increase density, while cooperative cage HBs increase openness.
  • Demonstrated temperature and pressure dependence of this balance, explaining supercooled water's liquid-liquid phase transition.

Conclusions:

  • The CageWater model provides a computationally efficient and accurate framework for understanding liquid water.
  • Revealed a new molecular basis for water's structure-property relations, distinct from the "2-density liquid" concept.
  • Potential applications in geophysics, biomolecular modeling, and materials science for water purification and green chemistry.