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Natural and induced growth of VO(2) (M) on VO(2) (B) ultrathin films

This work examines the synthesis of single phase VO(2) (B) thin films on LaAlO(3) (100) substrates, and the naturally-occurring and induced subsequent growth of VO(2) (M) phase on VO(2) (B) films. First, the thickness (t) dependence of structural, morphological and electrical properties of VO(2) fil...

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Autores principales: Émond, Nicolas, Torriss, Badr, Chaker, Mohamed
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5940801/
https://www.ncbi.nlm.nih.gov/pubmed/29740103
http://dx.doi.org/10.1038/s41598-018-25656-6
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author Émond, Nicolas
Torriss, Badr
Chaker, Mohamed
author_facet Émond, Nicolas
Torriss, Badr
Chaker, Mohamed
author_sort Émond, Nicolas
collection PubMed
description This work examines the synthesis of single phase VO(2) (B) thin films on LaAlO(3) (100) substrates, and the naturally-occurring and induced subsequent growth of VO(2) (M) phase on VO(2) (B) films. First, the thickness (t) dependence of structural, morphological and electrical properties of VO(2) films is investigated, evidencing that the growth of VO(2) (B) phase is progressively replaced by that of VO(2) (M) when t > ~11 nm. This change originates from the relaxation of the substrate-induced strain in the VO(2) (B) films, as corroborated by the simultaneous increase of surface roughness and decrease of the c-axis lattice parameter towards that of bulk VO(2) (B) for such films, yielding a complex mixed-phase structure composed of VO(2) (B)/VO(2) (M) phases, accompanied by the emergence of the VO(2) (M) insulator-to-metal phase transition. Second, the possibility of inducing this phase conversion, through a proper surface modification of the VO(2) (B) films via plasma treatment, is demonstrated. These natural and induced VO(2) (M) growths not only provide substantial insights into the competing nature of phases in the complex VO(2) polymorphs system, but can also be further exploited to synthesize VO(2) (M)/VO(2) (B) heterostructures at the micro/nanoscale for advanced electronics and energy applications.
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spelling pubmed-59408012018-05-11 Natural and induced growth of VO(2) (M) on VO(2) (B) ultrathin films Émond, Nicolas Torriss, Badr Chaker, Mohamed Sci Rep Article This work examines the synthesis of single phase VO(2) (B) thin films on LaAlO(3) (100) substrates, and the naturally-occurring and induced subsequent growth of VO(2) (M) phase on VO(2) (B) films. First, the thickness (t) dependence of structural, morphological and electrical properties of VO(2) films is investigated, evidencing that the growth of VO(2) (B) phase is progressively replaced by that of VO(2) (M) when t > ~11 nm. This change originates from the relaxation of the substrate-induced strain in the VO(2) (B) films, as corroborated by the simultaneous increase of surface roughness and decrease of the c-axis lattice parameter towards that of bulk VO(2) (B) for such films, yielding a complex mixed-phase structure composed of VO(2) (B)/VO(2) (M) phases, accompanied by the emergence of the VO(2) (M) insulator-to-metal phase transition. Second, the possibility of inducing this phase conversion, through a proper surface modification of the VO(2) (B) films via plasma treatment, is demonstrated. These natural and induced VO(2) (M) growths not only provide substantial insights into the competing nature of phases in the complex VO(2) polymorphs system, but can also be further exploited to synthesize VO(2) (M)/VO(2) (B) heterostructures at the micro/nanoscale for advanced electronics and energy applications. Nature Publishing Group UK 2018-05-08 /pmc/articles/PMC5940801/ /pubmed/29740103 http://dx.doi.org/10.1038/s41598-018-25656-6 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Émond, Nicolas
Torriss, Badr
Chaker, Mohamed
Natural and induced growth of VO(2) (M) on VO(2) (B) ultrathin films
title Natural and induced growth of VO(2) (M) on VO(2) (B) ultrathin films
title_full Natural and induced growth of VO(2) (M) on VO(2) (B) ultrathin films
title_fullStr Natural and induced growth of VO(2) (M) on VO(2) (B) ultrathin films
title_full_unstemmed Natural and induced growth of VO(2) (M) on VO(2) (B) ultrathin films
title_short Natural and induced growth of VO(2) (M) on VO(2) (B) ultrathin films
title_sort natural and induced growth of vo(2) (m) on vo(2) (b) ultrathin films
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5940801/
https://www.ncbi.nlm.nih.gov/pubmed/29740103
http://dx.doi.org/10.1038/s41598-018-25656-6
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