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Updated: Aug 11, 2026
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Design and Evaluation of Smart Glasses for Food Intake and Physical Activity Classification
Published on: February 14, 2018
Identifying the relevant parameters in design strategies for stable glasses
Leonardo Galliano1,2, Ludovic Berthier3
1Laboratoire de Physique de l'École Normale Supérieure ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris, 75005 Paris, France.
The Journal of Chemical Physics
|August 10, 2026
Summary
Researchers challenge the idea that physical properties cause glass stability. Instead, they propose that the dynamics of particle diameters are the primary driver for enhanced stability in ultrastable glasses.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Computational Materials Science
Background:
- Glasses are typically formed by cooling supercooled liquids.
- Recent advances include physical vapor deposition and numerical algorithms for creating ultrastable glasses.
- Understanding the key parameters governing glass stability is an ongoing challenge.
Purpose of the Study:
- To investigate the primary factors responsible for enhanced glass stability.
- To challenge the prevailing notion that optimized physical properties directly cause ultrastability.
- To explore the role of particle diameter dynamics in glass formation.
Main Methods:
- Developed computational methods to optimize physical quantities (e.g., hyperuniformity, local ordering) without altering particle diameters.
- Designed glass configurations with optimized physical properties.
- Compared the stability of these configurations to bulk equilibrium states.
Main Results:
- Optimizing physical quantities like hyperuniformity and local ordering did not result in enhanced glass stability.
- These physical quantities are correlated with, but not causally responsible for, ultrastability.
- The study demonstrates that diameter dynamics, not optimized physical properties, is the principal source of enhanced stability.
Conclusions:
- The design principles for stable glasses need reevaluation.
- Focus should shift from optimized physical quantities to the dynamical processes that generate stability.
- Diameter dynamics is identified as the key factor in achieving ultrastable glasses.
