Reactive Oxidation Induced Stoichiometric Modulation of Multivalent Vanadium Oxides

Sehwan Song; Dooyong Lee; Yeongjun Son; Yesul Choi; Jiwoong Kim; Seonghoon Han; Jisung Lee; Seokjun Kim; Seung Gyo Jeong; Si Heon Lim; Jiafeng Yan; Songkil Kim; Woo Seok Choi; Hyun Ho Kim; Jaeyong Kim; Jong Seong Bae; Naoshia Takesue; Chanyong Hwang; Sungkyun Park

doi:10.1002/smsc.202300171

Reactive Oxidation Induced Stoichiometric Modulation of Multivalent Vanadium Oxides

Sehwan Song, Dooyong Lee, Yeongjun Son, Yesul Choi, Jiwoong Kim, Seonghoon Han, Jisung Lee, Seokjun Kim, Seung Gyo Jeong, Si Heon Lim, Jiafeng Yan, Songkil Kim, Woo Seok Choi, Hyun Ho Kim, Jaeyong Kim, Jong Seong Bae, Naoshia Takesue, Chanyong Hwang, Sungkyun Park

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Vanadium oxides, such as V₂O₃, VO₂, and V₂O₅, have attracted considerable attention because of the fascinating physical properties of each oxidation state. On the other hand, precisely controlling the individual oxidation states is difficult due to the sensitivity of oxygen stoichiometry. This article reports that reactive oxygen annealing (ROA) can systematically change the oxidation state of the vanadium oxide films grown on a c-Al₂O₃ substrate compared with typical annealing under O₂ environments. Chemical, structural, electronic, and electrical analysis confirms the evolution of the vanadium oxide phases from V₂O₃ to V₂O₃/VO₂, VO₂, VO₂/V₂O₅, and V₂O₅, showing that the ROA method can control and tune the oxidation state of the highly oxygen-sensitive multivalent metal oxides.

Original language	English
Article number	2300171
Journal	Small Science
Volume	4
Issue number	4
DOIs	https://doi.org/10.1002/smsc.202300171
State	Published - Apr 2024

Keywords

multivalent vanadium oxides
phase transitions
reactive oxygen annealing

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title = "Reactive Oxidation Induced Stoichiometric Modulation of Multivalent Vanadium Oxides",

abstract = "Vanadium oxides, such as V2O3, VO2, and V2O5, have attracted considerable attention because of the fascinating physical properties of each oxidation state. On the other hand, precisely controlling the individual oxidation states is difficult due to the sensitivity of oxygen stoichiometry. This article reports that reactive oxygen annealing (ROA) can systematically change the oxidation state of the vanadium oxide films grown on a c-Al2O3 substrate compared with typical annealing under O2 environments. Chemical, structural, electronic, and electrical analysis confirms the evolution of the vanadium oxide phases from V2O3 to V2O3/VO2, VO2, VO2/V2O5, and V2O5, showing that the ROA method can control and tune the oxidation state of the highly oxygen-sensitive multivalent metal oxides.",

keywords = "multivalent vanadium oxides, phase transitions, reactive oxygen annealing",

author = "Sehwan Song and Dooyong Lee and Yeongjun Son and Yesul Choi and Jiwoong Kim and Seonghoon Han and Jisung Lee and Seokjun Kim and Jeong, {Seung Gyo} and Lim, {Si Heon} and Jiafeng Yan and Songkil Kim and Choi, {Woo Seok} and Kim, {Hyun Ho} and Jaeyong Kim and Bae, {Jong Seong} and Naoshia Takesue and Chanyong Hwang and Sungkyun Park",

note = "Publisher Copyright: {\textcopyright} 2024 The Authors. Small Science published by Wiley-VCH GmbH.",

year = "2024",

month = apr,

doi = "10.1002/smsc.202300171",

language = "English",

volume = "4",

journal = "Small Science",

issn = "2688-4046",

publisher = "John Wiley and Sons Inc.",

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TY - JOUR

T1 - Reactive Oxidation Induced Stoichiometric Modulation of Multivalent Vanadium Oxides

AU - Song, Sehwan

AU - Lee, Dooyong

AU - Son, Yeongjun

AU - Choi, Yesul

AU - Kim, Jiwoong

AU - Han, Seonghoon

AU - Lee, Jisung

AU - Kim, Seokjun

AU - Jeong, Seung Gyo

AU - Lim, Si Heon

AU - Yan, Jiafeng

AU - Kim, Songkil

AU - Choi, Woo Seok

AU - Kim, Hyun Ho

AU - Kim, Jaeyong

AU - Bae, Jong Seong

AU - Takesue, Naoshia

AU - Hwang, Chanyong

AU - Park, Sungkyun

PY - 2024/4

Y1 - 2024/4

N2 - Vanadium oxides, such as V2O3, VO2, and V2O5, have attracted considerable attention because of the fascinating physical properties of each oxidation state. On the other hand, precisely controlling the individual oxidation states is difficult due to the sensitivity of oxygen stoichiometry. This article reports that reactive oxygen annealing (ROA) can systematically change the oxidation state of the vanadium oxide films grown on a c-Al2O3 substrate compared with typical annealing under O2 environments. Chemical, structural, electronic, and electrical analysis confirms the evolution of the vanadium oxide phases from V2O3 to V2O3/VO2, VO2, VO2/V2O5, and V2O5, showing that the ROA method can control and tune the oxidation state of the highly oxygen-sensitive multivalent metal oxides.

AB - Vanadium oxides, such as V2O3, VO2, and V2O5, have attracted considerable attention because of the fascinating physical properties of each oxidation state. On the other hand, precisely controlling the individual oxidation states is difficult due to the sensitivity of oxygen stoichiometry. This article reports that reactive oxygen annealing (ROA) can systematically change the oxidation state of the vanadium oxide films grown on a c-Al2O3 substrate compared with typical annealing under O2 environments. Chemical, structural, electronic, and electrical analysis confirms the evolution of the vanadium oxide phases from V2O3 to V2O3/VO2, VO2, VO2/V2O5, and V2O5, showing that the ROA method can control and tune the oxidation state of the highly oxygen-sensitive multivalent metal oxides.

KW - multivalent vanadium oxides

KW - phase transitions

KW - reactive oxygen annealing

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U2 - 10.1002/smsc.202300171

DO - 10.1002/smsc.202300171

M3 - Article

AN - SCOPUS:85184475073

SN - 2688-4046

VL - 4

JO - Small Science

JF - Small Science

IS - 4

M1 - 2300171

ER -

Reactive Oxidation Induced Stoichiometric Modulation of Multivalent Vanadium Oxides

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Keywords

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