| Autor: |
Duncan R. Sutherland, R. Bruce van Dover, Katie Rose Gann, Sebastian Ament, Aine Boyer Connolly, Ming-Chiang Chang, John M. Gregoire, Carla P. Gomes, Dan Guevarra, Vidit Gupta, Maximilian Amsler, Michael Thompson |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
ACS combinatorial science. 22(12) |
| ISSN: |
2156-8944 |
| Popis: |
Recent advances in high-throughput experimentation for combinatorial studies have accelerated the discovery and analysis of materials across a wide range of compositions and synthesis conditions. However, many of the more powerful characterization methods are limited by speed, cost, availability, and/or resolution. To make efficient use of these methods, there is value in developing approaches for identifying critical compositions and conditions to be used as a priori knowledge for follow-up characterization with high-precision techniques, such as micrometer-scale synchrotron-based X-ray diffraction (XRD). Here, we demonstrate the use of optical microscopy and reflectance spectroscopy to identify likely phase-change boundaries in thin film libraries. These methods are used to delineate possible metastable phase boundaries following lateral-gradient laser spike annealing (lg-LSA) of oxide materials. The set of boundaries are then compared with definitive determinations of structural transformations obtained using high-resolution XRD. We demonstrate that the optical methods detect more than 95% of the structural transformations in a composition-gradient La-Mn-O library and a Ga2O3 sample, both subject to an extensive set of lg-LSA anneals. Our results provide quantitative support for the value of optically detected transformations as a priori data to guide subsequent structural characterization, ultimately accelerating and enhancing the efficient implementation of micrometer-resolution XRD experiments. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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