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Meeting Materials Science & Technology 2020
Symposium Glasses, Optical Materials, and their Functional Applications: Current Issues in Science & Technology
Presentation Title Cooper Distinguished Lecture: Exploring the Amorphous State of Matter by Roaming About the Network Building Blocks
Author(s) John Kieffer
On-Site Speaker (Planned) John Kieffer
Abstract Scope The network concept is widely applied for the description of amorphous materials, e.g., in the context of bonding topology, entanglement, gelation, jamming, etc., aspects that are all synonymous with mechanical stiffness. However, similar geometric criteria must characterize the migration pathways of mobile modifier cations, as these are delineated by the network structure. Hence, juxtaposing these antithetical glass properties can potentially reveal new insights into the amorphous state of matter. Indeed, we have shown how the adiabatic elastic modulus determined using Brillouin scattering, a technique that probes the nano-scale, serves to derive building block speciation in mixed network former glasses. Furthermore, the adiabatic bulk modulus and the activation energy for modifier cation migration are strongly anti-correlated, which led to an improved transition state theory model for cation hopping in glasses. By integrating MD simulations with this characterization approach, we endeavor to derive materials design criteria for amorphous solid-state electrolytes. Funding: NSF-DMR_1610742.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

2020 Alfred R. Cooper Young Scholar Award Presentation: Beyond the Average: A Statistical Mechanical Exploration of Topological Fluctuations in Glass-Forming Systems
Cooper Distinguished Lecture: Exploring the Amorphous State of Matter by Roaming About the Network Building Blocks
Decoding Structure-Dynamics Correlations in SiO2 Supercooled Liquid by Machine Learning
Development of YAG-alumina Composites for the Lightening Applications
Effect of Nanoscale Phase Separation on the Fracture Behavior of Glasses: Toward Tough, Yet Transparent Glasses
Effect of Transition Metal Impurities on the Properties of ZnSe Single Crystals
Elucidating Defect Behaviors and Lithium Ion Diffusion Mechanisms in Solid State Electrolytes from Atomistic Computer Simulations
Enhanced Optical Nonlinearity in Bismuth Borosilicate Glass Dispersed with Eu2O3 Stabilized Gold Nanoparticles
Glasses beyond Megabar Pressures
Melt-Quenching vs. Sol-gel vs. Vapor Deposition vs. Irradiation: Influence of the Synthesis Method on the Structure of SiO2
Photo-elastic Confirmation of Fast Surface Relaxation of Silica Glasses in the Presence of Water
Relative Roles of O and Si in Crack Nucleation and Propagation Mechanisms in Amorphous Silica
Surface Reactivity of Multi-component Glasses
Terahertz Time-domain Spectroscopy of Glasses

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