Effects of microstructure formation on the stability of vapor-deposited glasses.

ABSTRACT: Glasses formed by physical vapor deposition (PVD) are an interesting new class of materials, exhibiting properties thought to be equivalent to those of glasses aged for thousands of years. Exerting control over the structure and properties of PVD glasses formed with different types of glass-forming molecules is now an emerging challenge. In this work, we study coarse-grained models of organic glass formers containing fluorocarbon tails of increasing length, corresponding to an increased tendency to form microstructures. We use simulated PVD to examine how the presence of the microphase-separated domains in the supercooled liquid influences the ability to form stable glasses. This model suggests that increasing molecule tail length results in decreased thermodynamic stability of the molecul

SUBMITTER: Moore AR 

PROVIDER: S-EPMC6442635 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature