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We describe a novel approach for the rational design and synthesis of self-assembled periodic nanostructures using martensitic phase transformations. We demonstrate this approach in a thin film of perovskite SrSnO3 with reconfigurable periodic nanostructures consisting of regularly spaced regions of sharply contrasted dielectric properties. The films can be designed to have different periodicities and relative phase fractions via chemical doping or strain engineering. The dielectric contrast within a single film can be tuned using temperature and laser wavelength, effectively creating a variable photonic crystal. Our results show the realistic possibility of designing large-area self-assembled periodic structures using martensitic phase transformations with the potential of implementing "built-to-order"nanostructures for tailored optoelectronic functionalities.
Bibliographical noteFunding Information:
This work was primarily supported by the NSF DMR-1741801. Part of the work was supported by the Air Force Office of Scientific Research (AFOSR) through Grant Nos. FA9550-19-1-0245 and FA9550-21-1-0025. This work was partially supported through the UMN MRSEC program under award no. DMR-2011401 and the AFOSR MURI through Grant No. FA9550-17-1-0002. The work also benefitted from the RDF Fund of the Institute on the Environment (UMN), the Norwegian Centennial Chair Program (NOCC), and two Vannevar Bush Faculty Fellowships. Work at the UMN involving thin film characterization using synchrotron X-rays was supported by the U.S. Department of Energy through DE-SC0020211. Parts of this work were carried out at the Minnesota Nano Center and Characterization Facility, University of Minnesota, which receives partial support from the NSF through the MRSEC program. Use of the Advanced Photon Source, an Office of Science User Facility operated for the U.S. Department of Energy (DOE), Office of Science, by Argonne National Laboratory, was supported by the U.S. DOE under contract no. DE-AC02-06CH11357. A.F. acknowledges support from the NSF (grant no. 1553251), and Y.A. acknowledges support from AFOSR (grant no. FA9559-16-1-0172).
© 2020 American Chemical Society.
Copyright 2020 Elsevier B.V., All rights reserved.
- Phase transformation
- molecular beam epitaxy
PubMed: MeSH publication types
- Journal Article
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- 2 Active
9/1/20 → 8/31/26
Project: Research project