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Meeting MS&T22: Materials Science & Technology
Symposium Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
Presentation Title Inquiry of SiOC Structural Evolution via Synchrotron X-ray and Reactive Force Field Simulation
Author(s) Kathy Lu, Yue Zhou, Harrison Chaney, Ni Yang
On-Site Speaker (Planned) Kathy Lu
Abstract Scope Silicon oxycarbide (SiOC) is a unique system that can generate various compositions and microstructures via different polymeric precursors and pyrolysis conditions. However, understanding of the resulting atomic structural domains and characteristics, such as atomic coordination, cluster distribution, and phase genesis, is lacking. In this study, the structural cluster size, atomic packing, nanodomains of different carbon-containing SiOC ceramics synthesized at 1200°C and 1500°C, were investigated by synchrotron small-angle X-ray scattering and high energy X-ray method. The high energy X-ray pair distribution function (PDF) was processed and analyzed. Also, a new ReaxFF molecular dynamics modeling approach was developed and compared with the experimental data to uncover the relationship between compositions and pyrolysis temperatures on the evolution of atomic packing and nanodomains of different SiOCs.

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Computation-aided Developments of Highly Durable and Active Photoanodes and Electrocatalysts
Controlled Synthesis of Robust Reusable Nanostructures for Thermal Management and Energy Efficiency
Designing Atomically Precise Nanocatalysts for CO2 Electrochemical Reduction
Dopamine Assisted Phase Transformation and Electrochemical Charge Storage Properties of Vanadium Oxide/Carbon Composite Electrodes
Effect of Strain on the Thermoelectric Properties of Epitaxial La0.8Sr0.2CoO3 Thin Films
Eliminating Artifactural Indentation Size Effects in Nanoindentation of Hard Ceramics
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H-11: The Synaptic Devices Based on Ferroelectric Hf0.7Zr0.3O2 Thin Film
H-6: Carbon Fiber-reinforced CMCs for Ultra-high Temperature Applications
H-7: Electrodeposition of MnO2 Nanosheet Networks for Charge Storage
H-8: Fast Microwave-assisted Synthesis of Nanosctructured High Entropy Spinel
H-9: Lithium Storage Capacity of Carbon-rich Polymer-derived Ceramic Electrodes
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Manipulating Material Synthesis Using Electromagnetic Fields
Mechanistic Investigation of the Formation of Transition Metal Nanocrystallites Embedded in Amorphous Silicon Nitride Nanocomposites
Molten Salt Synthesis of Inorganic Nanomaterials
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