Understanding the structural, electrical, and optical properties of monolayer h-phase RuO2 nanosheets: A combined experimental and computational study

Dong Su Ko; Woo Jin Lee; Soohwan Sul; Changhoon Jung; Dong Jin Yun; Hee Goo Kim; Won Joon Son; Jae Gwan Chung; Doh Won Jung; Se Yun Kim; Jeongmin Kim; Wooyoung Lee; Chan Kwak; Jai Kwang Shin; Jung Hwa Kim; Jong Wook Roh

doi:10.1038/s41427-018-0020-y

Understanding the structural, electrical, and optical properties of monolayer h-phase RuO₂ nanosheets: A combined experimental and computational study

Dong Su Ko, Woo Jin Lee, Soohwan Sul, Changhoon Jung, Dong Jin Yun, Hee Goo Kim, Won Joon Son, Jae Gwan Chung, Doh Won Jung, Se Yun Kim, Jeongmin Kim, Wooyoung Lee, Chan Kwak, Jai Kwang Shin, Jung Hwa Kim, Jong Wook Roh

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Abstract

The structural, electrical, and optical properties of monolayer ruthenium oxide (RuO₂) nanosheets (NSs) fabricated by chemical exfoliation of a layered three-dimensional form of K-intercalated RuO₂ are studied systematically via experimental and computational methods. Monolayer RuO₂ NS is identified as having a distorted h-MX₂ structure. This is the first observation of a RuO₂ NS structure that is unlike the t-MX₂ structure of the RuO₂ layers in the parent material and does not have hexagonal symmetry. The distorted h-MX₂ RuO₂ NSs are shown to have optical transparency superior to that of graphene, thereby predicting the feasibility of applying RuO₂ NSs to flexible transparent electrodes. In addition, it is demonstrated that the semiconducting band structures of RuO₂ NSs can be manipulated to be semi-metallic by adjusting the crystal structure, which is related to band-gap engineering. This finding indicates that RuO₂ NSs can be used in a variety of applications, such as flexible transparent electrodes, atomic-layer devices, and optoelectronic devices.

Original language	English
Pages (from-to)	266-276
Number of pages	11
Journal	NPG Asia Materials
Volume	10
Issue number	4
DOIs	https://doi.org/10.1038/s41427-018-0020-y
State	Published - 1 Apr 2018

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Ko, D. S., Lee, W. J., Sul, S., Jung, C., Yun, D. J., Kim, H. G., Son, W. J., Chung, J. G., Jung, D. W., Kim, S. Y., Kim, J., Lee, W., Kwak, C., Shin, J. K., Kim, J. H., & Roh, J. W. (2018). Understanding the structural, electrical, and optical properties of monolayer h-phase RuO₂ nanosheets: A combined experimental and computational study. NPG Asia Materials, 10(4), 266-276. https://doi.org/10.1038/s41427-018-0020-y

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title = "Understanding the structural, electrical, and optical properties of monolayer h-phase RuO2 nanosheets: A combined experimental and computational study",

abstract = "The structural, electrical, and optical properties of monolayer ruthenium oxide (RuO2) nanosheets (NSs) fabricated by chemical exfoliation of a layered three-dimensional form of K-intercalated RuO2 are studied systematically via experimental and computational methods. Monolayer RuO2 NS is identified as having a distorted h-MX2 structure. This is the first observation of a RuO2 NS structure that is unlike the t-MX2 structure of the RuO2 layers in the parent material and does not have hexagonal symmetry. The distorted h-MX2 RuO2 NSs are shown to have optical transparency superior to that of graphene, thereby predicting the feasibility of applying RuO2 NSs to flexible transparent electrodes. In addition, it is demonstrated that the semiconducting band structures of RuO2 NSs can be manipulated to be semi-metallic by adjusting the crystal structure, which is related to band-gap engineering. This finding indicates that RuO2 NSs can be used in a variety of applications, such as flexible transparent electrodes, atomic-layer devices, and optoelectronic devices.",

author = "Ko, {Dong Su} and Lee, {Woo Jin} and Soohwan Sul and Changhoon Jung and Yun, {Dong Jin} and Kim, {Hee Goo} and Son, {Won Joon} and Chung, {Jae Gwan} and Jung, {Doh Won} and Kim, {Se Yun} and Jeongmin Kim and Wooyoung Lee and Chan Kwak and Shin, {Jai Kwang} and Kim, {Jung Hwa} and Roh, {Jong Wook}",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2018.",

year = "2018",

month = apr,

day = "1",

doi = "10.1038/s41427-018-0020-y",

language = "English",

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journal = "NPG Asia Materials",

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Ko, DS, Lee, WJ, Sul, S, Jung, C, Yun, DJ, Kim, HG, Son, WJ, Chung, JG, Jung, DW, Kim, SY, Kim, J, Lee, W, Kwak, C, Shin, JK, Kim, JH & Roh, JW 2018, 'Understanding the structural, electrical, and optical properties of monolayer h-phase RuO₂ nanosheets: A combined experimental and computational study', NPG Asia Materials, vol. 10, no. 4, pp. 266-276. https://doi.org/10.1038/s41427-018-0020-y

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T1 - Understanding the structural, electrical, and optical properties of monolayer h-phase RuO2 nanosheets

T2 - A combined experimental and computational study

AU - Ko, Dong Su

AU - Lee, Woo Jin

AU - Sul, Soohwan

AU - Jung, Changhoon

AU - Yun, Dong Jin

AU - Kim, Hee Goo

AU - Son, Won Joon

AU - Chung, Jae Gwan

AU - Jung, Doh Won

AU - Kim, Se Yun

AU - Kim, Jeongmin

AU - Lee, Wooyoung

AU - Kwak, Chan

AU - Shin, Jai Kwang

AU - Kim, Jung Hwa

AU - Roh, Jong Wook

PY - 2018/4/1

Y1 - 2018/4/1

N2 - The structural, electrical, and optical properties of monolayer ruthenium oxide (RuO2) nanosheets (NSs) fabricated by chemical exfoliation of a layered three-dimensional form of K-intercalated RuO2 are studied systematically via experimental and computational methods. Monolayer RuO2 NS is identified as having a distorted h-MX2 structure. This is the first observation of a RuO2 NS structure that is unlike the t-MX2 structure of the RuO2 layers in the parent material and does not have hexagonal symmetry. The distorted h-MX2 RuO2 NSs are shown to have optical transparency superior to that of graphene, thereby predicting the feasibility of applying RuO2 NSs to flexible transparent electrodes. In addition, it is demonstrated that the semiconducting band structures of RuO2 NSs can be manipulated to be semi-metallic by adjusting the crystal structure, which is related to band-gap engineering. This finding indicates that RuO2 NSs can be used in a variety of applications, such as flexible transparent electrodes, atomic-layer devices, and optoelectronic devices.

AB - The structural, electrical, and optical properties of monolayer ruthenium oxide (RuO2) nanosheets (NSs) fabricated by chemical exfoliation of a layered three-dimensional form of K-intercalated RuO2 are studied systematically via experimental and computational methods. Monolayer RuO2 NS is identified as having a distorted h-MX2 structure. This is the first observation of a RuO2 NS structure that is unlike the t-MX2 structure of the RuO2 layers in the parent material and does not have hexagonal symmetry. The distorted h-MX2 RuO2 NSs are shown to have optical transparency superior to that of graphene, thereby predicting the feasibility of applying RuO2 NSs to flexible transparent electrodes. In addition, it is demonstrated that the semiconducting band structures of RuO2 NSs can be manipulated to be semi-metallic by adjusting the crystal structure, which is related to band-gap engineering. This finding indicates that RuO2 NSs can be used in a variety of applications, such as flexible transparent electrodes, atomic-layer devices, and optoelectronic devices.

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JO - NPG Asia Materials

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ER -

Understanding the structural, electrical, and optical properties of monolayer h-phase RuO₂ nanosheets: A combined experimental and computational study

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