Cargando…
High-Quality Heteroepitaxial Growth of Thin Films of the Perovskite Oxynitride CaTaO(2)N: Importance of Interfacial Symmetry Matching between Films and Substrates
[Image: see text] Perovskite oxynitrides have been studied with regard to their visible light-driven photocatalytic activity and novel electronic functionalities. The assessment of the intrinsic physical and/or electrochemical properties of oxynitrides requires the epitaxial growth of single-crystal...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2020
|
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7288696/ https://www.ncbi.nlm.nih.gov/pubmed/32548526 http://dx.doi.org/10.1021/acsomega.0c01601 |
_version_ | 1783545326438711296 |
---|---|
author | Wakasugi, Takuto Hirose, Yasushi Nakao, Shoichiro Sugisawa, Yuki Sekiba, Daiichiro Hasegawa, Tetsuya |
author_facet | Wakasugi, Takuto Hirose, Yasushi Nakao, Shoichiro Sugisawa, Yuki Sekiba, Daiichiro Hasegawa, Tetsuya |
author_sort | Wakasugi, Takuto |
collection | PubMed |
description | [Image: see text] Perovskite oxynitrides have been studied with regard to their visible light-driven photocatalytic activity and novel electronic functionalities. The assessment of the intrinsic physical and/or electrochemical properties of oxynitrides requires the epitaxial growth of single-crystalline films. However, the heteroepitaxy of perovskite oxynitrides has not yet matured compared to the progress realized in work with perovskite oxides. Herein, we report the heteroepitaxial growth of CaTaO(2)N thin films with (100)(pc), (110)(pc), and (111)(pc) crystallographic surface orientations (where the subscript pc denotes a pseudocubic cell) on SrTiO(3) substrates using reactive radio frequency magnetron sputtering, along with investigations of crystallinity and surface morphology. Irrespective of surface orientation, stoichiometric CaTaO(2)N epitaxial thin films were grown coherently on SrTiO(3) substrates and showed clear step and terrace surfaces in the case of low values of film thickness of approximately 20 nm. A (110)(pc)-oriented film was also more highly crystalline than (100)(pc)- and (111)(pc)-oriented specimens. This relationship between crystallinity and surface orientation is ascribed to the number of inequivalent in-plane rotational domains, which stems from the symmetry mismatch between the orthorhombic CaTaO(2)N and cubic SrTiO(3). A CaTaO(2)N thin film grown on a lattice- and symmetry-matched orthorhombic DyScO(3) substrate exhibited a significant crystallinity and a clear step and terrace surface even though the film was thick (∼190 nm). These results are expected to assist in developing the heteroepitaxial growth of high-quality perovskite oxynitride thin films. |
format | Online Article Text |
id | pubmed-7288696 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-72886962020-06-15 High-Quality Heteroepitaxial Growth of Thin Films of the Perovskite Oxynitride CaTaO(2)N: Importance of Interfacial Symmetry Matching between Films and Substrates Wakasugi, Takuto Hirose, Yasushi Nakao, Shoichiro Sugisawa, Yuki Sekiba, Daiichiro Hasegawa, Tetsuya ACS Omega [Image: see text] Perovskite oxynitrides have been studied with regard to their visible light-driven photocatalytic activity and novel electronic functionalities. The assessment of the intrinsic physical and/or electrochemical properties of oxynitrides requires the epitaxial growth of single-crystalline films. However, the heteroepitaxy of perovskite oxynitrides has not yet matured compared to the progress realized in work with perovskite oxides. Herein, we report the heteroepitaxial growth of CaTaO(2)N thin films with (100)(pc), (110)(pc), and (111)(pc) crystallographic surface orientations (where the subscript pc denotes a pseudocubic cell) on SrTiO(3) substrates using reactive radio frequency magnetron sputtering, along with investigations of crystallinity and surface morphology. Irrespective of surface orientation, stoichiometric CaTaO(2)N epitaxial thin films were grown coherently on SrTiO(3) substrates and showed clear step and terrace surfaces in the case of low values of film thickness of approximately 20 nm. A (110)(pc)-oriented film was also more highly crystalline than (100)(pc)- and (111)(pc)-oriented specimens. This relationship between crystallinity and surface orientation is ascribed to the number of inequivalent in-plane rotational domains, which stems from the symmetry mismatch between the orthorhombic CaTaO(2)N and cubic SrTiO(3). A CaTaO(2)N thin film grown on a lattice- and symmetry-matched orthorhombic DyScO(3) substrate exhibited a significant crystallinity and a clear step and terrace surface even though the film was thick (∼190 nm). These results are expected to assist in developing the heteroepitaxial growth of high-quality perovskite oxynitride thin films. American Chemical Society 2020-05-28 /pmc/articles/PMC7288696/ /pubmed/32548526 http://dx.doi.org/10.1021/acsomega.0c01601 Text en Copyright © 2020 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Wakasugi, Takuto Hirose, Yasushi Nakao, Shoichiro Sugisawa, Yuki Sekiba, Daiichiro Hasegawa, Tetsuya High-Quality Heteroepitaxial Growth of Thin Films of the Perovskite Oxynitride CaTaO(2)N: Importance of Interfacial Symmetry Matching between Films and Substrates |
title | High-Quality Heteroepitaxial
Growth of Thin Films
of the Perovskite Oxynitride CaTaO(2)N: Importance of Interfacial
Symmetry Matching between Films and Substrates |
title_full | High-Quality Heteroepitaxial
Growth of Thin Films
of the Perovskite Oxynitride CaTaO(2)N: Importance of Interfacial
Symmetry Matching between Films and Substrates |
title_fullStr | High-Quality Heteroepitaxial
Growth of Thin Films
of the Perovskite Oxynitride CaTaO(2)N: Importance of Interfacial
Symmetry Matching between Films and Substrates |
title_full_unstemmed | High-Quality Heteroepitaxial
Growth of Thin Films
of the Perovskite Oxynitride CaTaO(2)N: Importance of Interfacial
Symmetry Matching between Films and Substrates |
title_short | High-Quality Heteroepitaxial
Growth of Thin Films
of the Perovskite Oxynitride CaTaO(2)N: Importance of Interfacial
Symmetry Matching between Films and Substrates |
title_sort | high-quality heteroepitaxial
growth of thin films
of the perovskite oxynitride catao(2)n: importance of interfacial
symmetry matching between films and substrates |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7288696/ https://www.ncbi.nlm.nih.gov/pubmed/32548526 http://dx.doi.org/10.1021/acsomega.0c01601 |
work_keys_str_mv | AT wakasugitakuto highqualityheteroepitaxialgrowthofthinfilmsoftheperovskiteoxynitridecatao2nimportanceofinterfacialsymmetrymatchingbetweenfilmsandsubstrates AT hiroseyasushi highqualityheteroepitaxialgrowthofthinfilmsoftheperovskiteoxynitridecatao2nimportanceofinterfacialsymmetrymatchingbetweenfilmsandsubstrates AT nakaoshoichiro highqualityheteroepitaxialgrowthofthinfilmsoftheperovskiteoxynitridecatao2nimportanceofinterfacialsymmetrymatchingbetweenfilmsandsubstrates AT sugisawayuki highqualityheteroepitaxialgrowthofthinfilmsoftheperovskiteoxynitridecatao2nimportanceofinterfacialsymmetrymatchingbetweenfilmsandsubstrates AT sekibadaiichiro highqualityheteroepitaxialgrowthofthinfilmsoftheperovskiteoxynitridecatao2nimportanceofinterfacialsymmetrymatchingbetweenfilmsandsubstrates AT hasegawatetsuya highqualityheteroepitaxialgrowthofthinfilmsoftheperovskiteoxynitridecatao2nimportanceofinterfacialsymmetrymatchingbetweenfilmsandsubstrates |