About this Abstract |
Meeting |
MS&T23: Materials Science & Technology
|
Symposium
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Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
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Presentation Title |
Designing Nanostructures in Complex Concentrated and Entropy Stabilized Oxide Thin Films |
Author(s) |
Huiming Guo, William Bowman |
On-Site Speaker (Planned) |
William Bowman |
Abstract Scope |
Complex concentrated oxides (CCOs) are an emerging material class including high-entropy and entropy-stabilized oxides, whose properties stem from disorder-induced electronic structure and chemistry. Integrating CCOs into composites will expand material design beyond the single-phase paradigm. We demonstrate tunable CCO-derived nanostructures by a simple one-step approach to direct the evolution of nanoporosity [1], nanoparticles and nanorods in nanocomposites [2]. We have developed a fundamental understanding of driving forces and formation mechanisms in CCOs using atomic-scale probes, which reveal that synthesis can be directed using Ellingham’s model of cation reducibility in this case study on a model perovskite CCO. Given CCOs’ vast combinatorial space, this is expected to be highly extensible via integration of novel compositions and crystal structures. Furthermore, this approach enables tailored growth of novel multielement nanorod and nanoparticle composite structures correlated with electronic conductivity.
[1] H. Guo…W.J. Bowman (2022) J. Materials Research
[2] H. Guo…W.J. Bowman (submitted) |