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Monodisperse patchy particle glass former.

Susana Marín-Aguilar1, Frank Smallenburg1, Francesco Sciortino2

  • 1Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides, 91405 Orsay, France.

The Journal of Chemical Physics
|July 9, 2021
PubMed
Summary
This summary is machine-generated.

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Patchy particles can form stable glasses without crystallization. An 8-patch geometry is ideal for monodisperse glass formers, maintaining liquid-like structures across various conditions.

Area of Science:

  • Materials Science
  • Computational Chemistry
  • Soft Matter Physics

Background:

  • Glass formers prevent crystallization, but monodisperse systems typically crystallize rapidly.
  • Particle mixtures are commonly used to create simulated glass formers.
  • Patchy particles offer tunable local structure formation.

Purpose of the Study:

  • To investigate patchy particles as monodisperse glass formers.
  • To explore the influence of patch geometry on glass-forming properties.
  • To identify optimal patchy particle designs for stable glass formation.

Main Methods:

  • Simulations of monodisperse systems with varying patchy particle geometries (12-patch and 8-patch).
  • Analysis of crystallization behavior and local structure formation.

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  • Evaluation of structural preservation across different temperatures and packing fractions.

    • Main Results:

    • Both 12-patch and 8-patch monodisperse systems avoid crystallization and exhibit glassy characteristics at low temperatures.
    • The 8-patch geometry demonstrates superior preservation of simple liquid structures over a broad range of conditions.
    • The 12-patch geometry favors specific icosahedral cluster formation.

    Conclusions:

    • Monodisperse patchy particles can function as effective glass formers.
    • The 8-patch geometry is a promising candidate for creating stable, monodisperse glasses.
    • Patchy particle design significantly impacts glass-forming ability and structural integrity.