Natural and induced growth of VO2 (M) on VO2 (B) ultrathin films

Abstract This work examines the synthesis of single phase VO2 (B) thin films on LaAlO3 (100) substrates, and the naturally-occurring and induced subsequent growth of VO2 (M) phase on VO2 (B) films. First, the thickness (t) dependence of structural, morphological and electrical properties of VO2 film...

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Autores principales:	Nicolas Émond, Badr Torriss, Mohamed Chaker
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/dd41641fddae4696b79cbcbb8a06303d
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spelling	oai:doaj.org-article:dd41641fddae4696b79cbcbb8a06303d2021-12-02T12:32:10ZNatural and induced growth of VO2 (M) on VO2 (B) ultrathin films10.1038/s41598-018-25656-62045-2322https://doaj.org/article/dd41641fddae4696b79cbcbb8a06303d2018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25656-6https://doaj.org/toc/2045-2322Abstract This work examines the synthesis of single phase VO2 (B) thin films on LaAlO3 (100) substrates, and the naturally-occurring and induced subsequent growth of VO2 (M) phase on VO2 (B) films. First, the thickness (t) dependence of structural, morphological and electrical properties of VO2 films is investigated, evidencing that the growth of VO2 (B) phase is progressively replaced by that of VO2 (M) when t > ~11 nm. This change originates from the relaxation of the substrate-induced strain in the VO2 (B) films, as corroborated by the simultaneous increase of surface roughness and decrease of the c-axis lattice parameter towards that of bulk VO2 (B) for such films, yielding a complex mixed-phase structure composed of VO2 (B)/VO2 (M) phases, accompanied by the emergence of the VO2 (M) insulator-to-metal phase transition. Second, the possibility of inducing this phase conversion, through a proper surface modification of the VO2 (B) films via plasma treatment, is demonstrated. These natural and induced VO2 (M) growths not only provide substantial insights into the competing nature of phases in the complex VO2 polymorphs system, but can also be further exploited to synthesize VO2 (M)/VO2 (B) heterostructures at the micro/nanoscale for advanced electronics and energy applications.Nicolas ÉmondBadr TorrissMohamed ChakerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-8 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Nicolas Émond Badr Torriss Mohamed Chaker Natural and induced growth of VO2 (M) on VO2 (B) ultrathin films
description	Abstract This work examines the synthesis of single phase VO2 (B) thin films on LaAlO3 (100) substrates, and the naturally-occurring and induced subsequent growth of VO2 (M) phase on VO2 (B) films. First, the thickness (t) dependence of structural, morphological and electrical properties of VO2 films is investigated, evidencing that the growth of VO2 (B) phase is progressively replaced by that of VO2 (M) when t > ~11 nm. This change originates from the relaxation of the substrate-induced strain in the VO2 (B) films, as corroborated by the simultaneous increase of surface roughness and decrease of the c-axis lattice parameter towards that of bulk VO2 (B) for such films, yielding a complex mixed-phase structure composed of VO2 (B)/VO2 (M) phases, accompanied by the emergence of the VO2 (M) insulator-to-metal phase transition. Second, the possibility of inducing this phase conversion, through a proper surface modification of the VO2 (B) films via plasma treatment, is demonstrated. These natural and induced VO2 (M) growths not only provide substantial insights into the competing nature of phases in the complex VO2 polymorphs system, but can also be further exploited to synthesize VO2 (M)/VO2 (B) heterostructures at the micro/nanoscale for advanced electronics and energy applications.
format	article
author	Nicolas Émond Badr Torriss Mohamed Chaker
author_facet	Nicolas Émond Badr Torriss Mohamed Chaker
author_sort	Nicolas Émond
title	Natural and induced growth of VO2 (M) on VO2 (B) ultrathin films
title_short	Natural and induced growth of VO2 (M) on VO2 (B) ultrathin films
title_full	Natural and induced growth of VO2 (M) on VO2 (B) ultrathin films
title_fullStr	Natural and induced growth of VO2 (M) on VO2 (B) ultrathin films
title_full_unstemmed	Natural and induced growth of VO2 (M) on VO2 (B) ultrathin films
title_sort	natural and induced growth of vo2 (m) on vo2 (b) ultrathin films
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/dd41641fddae4696b79cbcbb8a06303d
work_keys_str_mv	AT nicolasemond naturalandinducedgrowthofvo2monvo2bultrathinfilms AT badrtorriss naturalandinducedgrowthofvo2monvo2bultrathinfilms AT mohamedchaker naturalandinducedgrowthofvo2monvo2bultrathinfilms
_version_	1718394187052744704

Natural and induced growth of VO2 (M) on VO2 (B) ultrathin films

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