Age and Structure of a Model Vapor-Deposited Glass

Abstract

Glass films prepared by a process of physical vapor deposition have been shown to have thermodynamic and kinetic stability comparable to those of ordinary glasses aged for thousands of years. A central question in the study of vapor-deposited glasses, particularly in light of new knowledge regarding anisotropy in these materials, is whether the ultra-stable glassy films formed by vapor deposition are ever equivalent to those obtained by liquid cooling. We present a computational study of vapor deposition for a two-dimensional glass forming liquid using a methodology which closely mimics experiment. We find that for the model considered here, structures that arise in vapor-deposited materials are statistically identical to those observed in ordinary glasses, provided the two are compared at the same inherent structure energy. We also find that newly deposited hot molecules produce cascades of hot particles that propagate far into the film, possibly influencing the relaxation of the material.

References in corpus (5)

• String-like Clusters and Cooperative Motion in a Model Glass-Forming Liquid
• Glass transitions in two-dimensional suspensions of colloidal ellipsoids
• Model Vapor-Deposited Glasses: Growth Front and Composition Effects
• Preparation and relaxation of very stable glassy states of a simulated liquid
• Equilibrium ultrastable glasses produced by random pinning

Cited by in corpus (10)

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• Structural signatures of ultrastability in a deposited glassformer
• On the Allowable or Forbidden Nature of Vapor-Deposited Glasses
• Computational Methods toward Ultrastable Glasses
• Inherent Structure Energy is a Good Indicator of Molecular Mobility in Glasses