ArticleProceedings of the National Academy of Sciences of the United States of America2017
Disconnecting structure and dynamics in glassy thin films.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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12 citing papers in PubMed.
- Analyzing QCM Data Using a New Transfer-Matrix Model: Long-Ranged Asymmetric Gradient in Shear Modulus Identified Across Immiscible Glassy-Rubbery Polymer Interface.Macromolecules · 2025Article
- Intramolecular dynamic coupling slows surface relaxation of polymer glasses.Nature communications · 2024Article
- Information decomposition in complex systems via machine learning.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Intermediate-range order governs dynamics in dense colloidal liquids.Proceedings of the National Academy of Sciences of the United States of America · 2023Article
- Surface premelting and melting of colloidal glasses.Science advances · 2023Article
- Correlation of plastic events with local structure in jammed packings across spatial dimensions.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- Fast equilibration mechanisms in disordered materials mediated by slow liquid dynamics.Science advances · 2022Article
- Nature of dynamic gradients, glass formation, and collective effects in ultrathin freestanding films.Proceedings of the National Academy of Sciences of the United States of America · 2021Article
- Localization model description of the interfacial dynamics of crystalline Cu andThe European physical journal. E, Soft matter · 2021Article
- Machine learning in a data-limited regime: Augmenting experiments with synthetic data uncovers order in crumpled sheets.Science advances · 2019Article
- Machine learning determination of atomic dynamics at grain boundaries.Proceedings of the National Academy of Sciences of the United States of America · 2018Article
- Structure-property relationships from universal signatures of plasticity in disordered solids.Science (New York, N.Y.) · 2017Article
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4 authors.
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Abstract
Nanometrically thin glassy films depart strikingly from the behavior of their bulk counterparts. We investigate whether the dynamical differences between a bulk and thin film polymeric glass former can be understood by differences in local microscopic structure. Machine learning methods have shown that local structure can serve as the foundation for successful, predictive models of particle rearrangement dynamics in bulk systems. By contrast, in thin glassy films, we find that particles at the center of the film and those near the surface are structurally indistinguishable despite exhibiting very different dynamics. Next, we show that structure-independent processes, already present in bulk systems and demonstrably different from simple facilitated dynamics, are crucial for understanding glassy dynamics in thin films. Our analysis suggests a picture of glassy dynamics in which two dynamical processes coexist, with relative strengths that depend on the distance from an interface. One of these processes depends on local structure and is unchanged throughout most of the film, while the other is purely Arrhenius, does not depend on local structure, and is strongly enhanced near the free surface of a film.
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