3D-to-2D phase transformation through highly ordered 1D crystals from transition-metal oxides to dichalcogenides

Hyangsook Lee; Yeonchoo Cho; Kwang Sik Jeong; Taejin Park; Mirine Leem; Wonsik Ahn; Hoijoon Kim; Jung Hwa Kim; Heegu Kim; Mann Ho Cho; Eunha Lee; Hyoungsub Kim; Sung Woo Hwang

doi:10.1016/j.mattod.2021.02.009

3D-to-2D phase transformation through highly ordered 1D crystals from transition-metal oxides to dichalcogenides

Hyangsook Lee, Yeonchoo Cho, Kwang Sik Jeong, Taejin Park, Mirine Leem, Wonsik Ahn, Hoijoon Kim, Jung Hwa Kim, Heegu Kim, Mann Ho Cho, Eunha Lee, Hyoungsub Kim, Sung Woo Hwang

Department of Physics

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

1 Citation (Scopus)

Abstract

Although solid-state phase transformations through chemical reaction with the surrounding environment are important in the field of materials science, the atomic-level dynamics at reacting surfaces have been difficult to observe directly. Herein, we found highly ordered arrays of 1D intermediate crystals with a unique atomic configuration during the thermal sulfidation of 3D-structured MoO₂ to 2D layer-structured MoS₂. These arrays reveal a dimension-breaking reconstruction process (3D → 1D → 2D) as well as a unique electronic structure evolution. Theoretical calculations show that the 1D crystals have a cross-sectional structure of four transition-metal atoms arranged in a diamond shape; these are critical to the atomic layer-by-layer formation of 2D transition-metal dichalcogenides. Furthermore, electronic structure analyses reveal that the 1D intermediate crystals alter the MoO₂/MoS₂ contact structure from p- to n-type with increases in the number of formed MoS₂ layers.

Original language	English
Pages (from-to)	38-44
Number of pages	7
Journal	Materials Today
Volume	47
DOIs	https://doi.org/10.1016/j.mattod.2021.02.009
Publication status	Published - 2021 Jul 1

Bibliographical note

Funding Information:
Funding: Mirine Leem, Wonsik Ahn, Hoijoon Kim, and Hyoungsub Kim received support from the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning [grant no. NRF-2014R1A4A1008474]. The raw and processed data required to reproduce these findings are available from the corresponding authors upon reasonable request.

Publisher Copyright:
© 2021 Elsevier Ltd

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.mattod.2021.02.009

Cite this

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title = "3D-to-2D phase transformation through highly ordered 1D crystals from transition-metal oxides to dichalcogenides",

abstract = "Although solid-state phase transformations through chemical reaction with the surrounding environment are important in the field of materials science, the atomic-level dynamics at reacting surfaces have been difficult to observe directly. Herein, we found highly ordered arrays of 1D intermediate crystals with a unique atomic configuration during the thermal sulfidation of 3D-structured MoO2 to 2D layer-structured MoS2. These arrays reveal a dimension-breaking reconstruction process (3D → 1D → 2D) as well as a unique electronic structure evolution. Theoretical calculations show that the 1D crystals have a cross-sectional structure of four transition-metal atoms arranged in a diamond shape; these are critical to the atomic layer-by-layer formation of 2D transition-metal dichalcogenides. Furthermore, electronic structure analyses reveal that the 1D intermediate crystals alter the MoO2/MoS2 contact structure from p- to n-type with increases in the number of formed MoS2 layers.",

author = "Hyangsook Lee and Yeonchoo Cho and Jeong, {Kwang Sik} and Taejin Park and Mirine Leem and Wonsik Ahn and Hoijoon Kim and Kim, {Jung Hwa} and Heegu Kim and Cho, {Mann Ho} and Eunha Lee and Hyoungsub Kim and Hwang, {Sung Woo}",

note = "Funding Information: Funding: Mirine Leem, Wonsik Ahn, Hoijoon Kim, and Hyoungsub Kim received support from the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning [grant no. NRF-2014R1A4A1008474]. The raw and processed data required to reproduce these findings are available from the corresponding authors upon reasonable request. Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

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doi = "10.1016/j.mattod.2021.02.009",

language = "English",

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AU - Lee, Hyangsook

AU - Cho, Yeonchoo

AU - Jeong, Kwang Sik

AU - Park, Taejin

AU - Leem, Mirine

AU - Ahn, Wonsik

AU - Kim, Hoijoon

AU - Kim, Jung Hwa

AU - Kim, Heegu

AU - Cho, Mann Ho

AU - Lee, Eunha

AU - Kim, Hyoungsub

AU - Hwang, Sung Woo

N1 - Funding Information: Funding: Mirine Leem, Wonsik Ahn, Hoijoon Kim, and Hyoungsub Kim received support from the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT & Future Planning [grant no. NRF-2014R1A4A1008474]. The raw and processed data required to reproduce these findings are available from the corresponding authors upon reasonable request. Publisher Copyright: © 2021 Elsevier Ltd

PY - 2021/7/1

Y1 - 2021/7/1

N2 - Although solid-state phase transformations through chemical reaction with the surrounding environment are important in the field of materials science, the atomic-level dynamics at reacting surfaces have been difficult to observe directly. Herein, we found highly ordered arrays of 1D intermediate crystals with a unique atomic configuration during the thermal sulfidation of 3D-structured MoO2 to 2D layer-structured MoS2. These arrays reveal a dimension-breaking reconstruction process (3D → 1D → 2D) as well as a unique electronic structure evolution. Theoretical calculations show that the 1D crystals have a cross-sectional structure of four transition-metal atoms arranged in a diamond shape; these are critical to the atomic layer-by-layer formation of 2D transition-metal dichalcogenides. Furthermore, electronic structure analyses reveal that the 1D intermediate crystals alter the MoO2/MoS2 contact structure from p- to n-type with increases in the number of formed MoS2 layers.

AB - Although solid-state phase transformations through chemical reaction with the surrounding environment are important in the field of materials science, the atomic-level dynamics at reacting surfaces have been difficult to observe directly. Herein, we found highly ordered arrays of 1D intermediate crystals with a unique atomic configuration during the thermal sulfidation of 3D-structured MoO2 to 2D layer-structured MoS2. These arrays reveal a dimension-breaking reconstruction process (3D → 1D → 2D) as well as a unique electronic structure evolution. Theoretical calculations show that the 1D crystals have a cross-sectional structure of four transition-metal atoms arranged in a diamond shape; these are critical to the atomic layer-by-layer formation of 2D transition-metal dichalcogenides. Furthermore, electronic structure analyses reveal that the 1D intermediate crystals alter the MoO2/MoS2 contact structure from p- to n-type with increases in the number of formed MoS2 layers.

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3D-to-2D phase transformation through highly ordered 1D crystals from transition-metal oxides to dichalcogenides

Abstract

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