Surface-Mediated Formation of Stable Glasses.

Area of Science:

• Materials Science
• Physical Chemistry
• Surface Science

Background:

• Stable glasses (SGs) are formed via physical vapor deposition (PVD) for diverse glass formers.
• Surface properties significantly influence the thermodynamic and kinetic stability of SGs.

Purpose of the Study:

• To review the understanding of surface-mediated SG formation.
• To identify knowledge gaps in glass surface dynamics and their impact on SG formation.

Main Methods:

• Review of existing literature on PVD of stable glasses.
• Analysis of the relationship between deposition parameters and SG properties.
• Examination of glass surface structure, dynamics, and their influence on stability.

Main Results:

• PVD enables SG formation by leveraging surface mediation.
• Deposition parameters (temperature, rate) and material composition control SG stability and anisotropic packing.
• Glass surface characteristics, including oriented packing and enhanced diffusion, impact SG properties and aging.

Conclusions:

• Surface dynamics play a crucial role in the formation and properties of stable glasses produced by PVD.
• Further research is needed to fully elucidate the complex interplay between glass surface dynamics and the resulting material properties.