Structural and electrical properties of VO2/ZnO nanostructures

Zhenlan Jin; In Hui Hwang; Chang In Park; Sun Hong Park; Sang Wook Han

doi:10.1016/j.cap.2017.12.009

Structural and electrical properties of VO₂/ZnO nanostructures

Zhenlan Jin
, In Hui Hwang
, Chang In Park
, Sun Hong Park
, Sang Wook Han^*

^*Corresponding author for this work

Physics Education

Research output: Contribution to journal › Journal article › peer-review

9 Scopus citations

Abstract

We examined the structural and electrical properties of uniformly-oriented VO₂/ZnO nanostructures. VO₂ was deposited on ZnO templates by using a direct current-sputtering deposition. Scanning electron microscope and transmission electron microscope measurements indicated that b-oriented VO₂ were uniformly crystallized on ZnO templates with different lengths. VO₂/ZnO formed nanorods on ZnO nanorods with length longer than 250 nm. X-ray absorption fine structure at the V K edge of VO₂/ZnO showed M₁ and R phases of VO₂ at 30 and 100 °C, respectively, suggesting structural-phase transition occurring between the two temperatures. Temperature-dependent resistance measurements of VO₂/ZnO nanostructures revealed metal-to-insulator transition at 65 °C and 55 °C during a heating and a cooling, respectively, regardless of ZnO length. Asymmetry behavior of resistance curves from VO₂/ZnO nanostructure during a heating and a cooling was attributed from a strong bond of VO₂ and ZnO.

Original language	English
Pages (from-to)	353-359
Number of pages	7
Journal	Current Applied Physics
Volume	18
Issue number	3
DOIs	https://doi.org/10.1016/j.cap.2017.12.009
State	Published - 2018.03

Keywords

Metal-to-insulator transition
Nanostructure
VO
XAFS
ZnO

Quacquarelli Symonds(QS) Subject Topics

Materials Science
Physics & Astronomy

Access to Document

10.1016/j.cap.2017.12.009

Cite this

@article{a28b0075b0b9453a9fbd778aa2d17851,

title = "Structural and electrical properties of VO2/ZnO nanostructures",

abstract = "We examined the structural and electrical properties of uniformly-oriented VO2/ZnO nanostructures. VO2 was deposited on ZnO templates by using a direct current-sputtering deposition. Scanning electron microscope and transmission electron microscope measurements indicated that b-oriented VO2 were uniformly crystallized on ZnO templates with different lengths. VO2/ZnO formed nanorods on ZnO nanorods with length longer than 250 nm. X-ray absorption fine structure at the V K edge of VO2/ZnO showed M1 and R phases of VO2 at 30 and 100 °C, respectively, suggesting structural-phase transition occurring between the two temperatures. Temperature-dependent resistance measurements of VO2/ZnO nanostructures revealed metal-to-insulator transition at 65 °C and 55 °C during a heating and a cooling, respectively, regardless of ZnO length. Asymmetry behavior of resistance curves from VO2/ZnO nanostructure during a heating and a cooling was attributed from a strong bond of VO2 and ZnO.",

keywords = "Metal-to-insulator transition, Nanostructure, VO, XAFS, ZnO",

author = "Zhenlan Jin and Hwang, \{In Hui\} and Park, \{Chang In\} and Park, \{Sun Hong\} and Han, \{Sang Wook\}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2018",

month = mar,

doi = "10.1016/j.cap.2017.12.009",

language = "English",

volume = "18",

pages = "353--359",

journal = "Current Applied Physics",

issn = "1567-1739",

number = "3",

}

TY - JOUR

T1 - Structural and electrical properties of VO2/ZnO nanostructures

AU - Jin, Zhenlan

AU - Hwang, In Hui

AU - Park, Chang In

AU - Park, Sun Hong

AU - Han, Sang Wook

PY - 2018/3

Y1 - 2018/3

N2 - We examined the structural and electrical properties of uniformly-oriented VO2/ZnO nanostructures. VO2 was deposited on ZnO templates by using a direct current-sputtering deposition. Scanning electron microscope and transmission electron microscope measurements indicated that b-oriented VO2 were uniformly crystallized on ZnO templates with different lengths. VO2/ZnO formed nanorods on ZnO nanorods with length longer than 250 nm. X-ray absorption fine structure at the V K edge of VO2/ZnO showed M1 and R phases of VO2 at 30 and 100 °C, respectively, suggesting structural-phase transition occurring between the two temperatures. Temperature-dependent resistance measurements of VO2/ZnO nanostructures revealed metal-to-insulator transition at 65 °C and 55 °C during a heating and a cooling, respectively, regardless of ZnO length. Asymmetry behavior of resistance curves from VO2/ZnO nanostructure during a heating and a cooling was attributed from a strong bond of VO2 and ZnO.

AB - We examined the structural and electrical properties of uniformly-oriented VO2/ZnO nanostructures. VO2 was deposited on ZnO templates by using a direct current-sputtering deposition. Scanning electron microscope and transmission electron microscope measurements indicated that b-oriented VO2 were uniformly crystallized on ZnO templates with different lengths. VO2/ZnO formed nanorods on ZnO nanorods with length longer than 250 nm. X-ray absorption fine structure at the V K edge of VO2/ZnO showed M1 and R phases of VO2 at 30 and 100 °C, respectively, suggesting structural-phase transition occurring between the two temperatures. Temperature-dependent resistance measurements of VO2/ZnO nanostructures revealed metal-to-insulator transition at 65 °C and 55 °C during a heating and a cooling, respectively, regardless of ZnO length. Asymmetry behavior of resistance curves from VO2/ZnO nanostructure during a heating and a cooling was attributed from a strong bond of VO2 and ZnO.

KW - Metal-to-insulator transition

KW - Nanostructure

KW - VO

KW - XAFS

KW - ZnO

UR - https://www.scopus.com/pages/publications/85039751060

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DO - 10.1016/j.cap.2017.12.009

M3 - Journal article

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