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강상관계 물질 연구단
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Metallic Interface Induced Ionic Redistribution within Amorphous MoO3 Films

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Title
Metallic Interface Induced Ionic Redistribution within Amorphous MoO3 Films
Author(s)
Paparoni, Francesco; Mijiti, Yimin; Kazim, Shafaq; Minicucci, Marco; Pinto, Nicola; D'Elia, Alessandro; Macis, Salvatore; Changyoung Kim; Soonsang Huh; Gunnella, Roberto; Marcelli, Augusto; DiCicco, Andrea; Rezvani, Seyed Javad
Publication Date
2022-08
Journal
Advanced Materials Interfaces, v.9, no.23
Publisher
John Wiley and Sons Inc
Abstract
Advanced Materials Interfaces published by Wiley-VCH GmbH.The phase evolution and ionic redistribution in amorphous MoO3 films, deposited on metallic aluminium (Al) and copper (Cu) substrates and subjected to distinct thermal treatments, are systematically investigated in this work. It is shown that the metallic interface significantly modifies the formation and dynamics of oxygen vacancies within the resulted structure, reducing the oxygen content of the MoO3 up to x < 2.94. The concentration of the oxygen vacancies can also be extended to the bulk via thermal treatment up to 400 °C. It is demonstrated that the MoO3 structure on metallic substrates is affected either by the diffusion of the metallic atoms inserted from the interface, which results in a formation of the meta-stable alloy phases in case of Cu, or by the introduction of the oxygen vacancies into the crystalline matrix in case of Al. The oxygen vacancy density in the MoO3 films with a metallic interface can be tuned via optimal choice of the metal and treatment parameters such as temperature and oxygen partial pressure. Furthermore, the intrinsic defects present in the amorphous structure enhance the ionic mobility and diffusion of the metallic ions inside the crystalline structure.
URI
https://pr.ibs.re.kr/handle/8788114/12281
DOI
10.1002/admi.202200453
ISSN
2196-7350
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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