Modulation of conductivity and contact resistance of ruo2 nanosheets via metal nano-particles surface decoration

Jongwon Kim; Seonhye Youn; Ju Young Baek; Dong Hwan Kim; Sumin Kim; Wooyoung Lee; Hee Jung Park; Juyoung Kim; Dong Won Chun; Sang Shik Park; Jong Wook Roh; Jeongmin Kim

doi:10.3390/nano11092444

Modulation of conductivity and contact resistance of ruo2 nanosheets via metal nano-particles surface decoration

Jongwon Kim, Seonhye Youn, Ju Young Baek, Dong Hwan Kim, Sumin Kim, Wooyoung Lee, Hee Jung Park, Juyoung Kim, Dong Won Chun, Sang Shik Park, Jong Wook Roh, Jeongmin Kim

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

2 Citations (Scopus)

Abstract

We studied the variation in electrical conductivity of exfoliated RuO2 nanosheets and the modulation in the contact resistance of individual nanosheet devices using charge transfer doping effects based on surface metal nanoparticle decorations. The electrical conductivity in the mono-layer and bilayer RuO2 nanosheets gradually increased due to the surface decoration of Cu, and subsequently Ag, nanoparticles. We obtained contact resistances between the nanosheet and electrodes using the four-point and two-point probe techniques. Moreover, the contact resistances de-creased during the surface decoration processes. We established that the surface decoration of metal nanoparticles is a suitable method for external contact engineering and the modulation of the inter-nal properties of nanomaterials.

Original language	English
Article number	2444
Journal	Nanomaterials
Volume	11
Issue number	9
DOIs	https://doi.org/10.3390/nano11092444
Publication status	Published - 2021 Sept

Bibliographical note

Funding Information:
Funding: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2019R1I1A1A01063687 and NRF-2021R1A5A8033165) and by the DGIST R&D Program (21-ET-07).

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2019R1I1A1A01063687 and NRF-2021R1A5A8033165) and by the DGIST R&D Program (21-ET-07).

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

All Science Journal Classification (ASJC) codes

Chemical Engineering(all)
Materials Science(all)

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title = "Modulation of conductivity and contact resistance of ruo2 nanosheets via metal nano-particles surface decoration",

abstract = "We studied the variation in electrical conductivity of exfoliated RuO2 nanosheets and the modulation in the contact resistance of individual nanosheet devices using charge transfer doping effects based on surface metal nanoparticle decorations. The electrical conductivity in the mono-layer and bilayer RuO2 nanosheets gradually increased due to the surface decoration of Cu, and subsequently Ag, nanoparticles. We obtained contact resistances between the nanosheet and electrodes using the four-point and two-point probe techniques. Moreover, the contact resistances de-creased during the surface decoration processes. We established that the surface decoration of metal nanoparticles is a suitable method for external contact engineering and the modulation of the inter-nal properties of nanomaterials.",

author = "Jongwon Kim and Seonhye Youn and Baek, {Ju Young} and Kim, {Dong Hwan} and Sumin Kim and Wooyoung Lee and Park, {Hee Jung} and Juyoung Kim and Chun, {Dong Won} and Park, {Sang Shik} and Roh, {Jong Wook} and Jeongmin Kim",

note = "Funding Information: Funding: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2019R1I1A1A01063687 and NRF-2021R1A5A8033165) and by the DGIST R&D Program (21-ET-07). Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2019R1I1A1A01063687 and NRF-2021R1A5A8033165) and by the DGIST R&D Program (21-ET-07). Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

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doi = "10.3390/nano11092444",

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AU - Kim, Jongwon

AU - Youn, Seonhye

AU - Baek, Ju Young

AU - Kim, Dong Hwan

AU - Kim, Sumin

AU - Lee, Wooyoung

AU - Park, Hee Jung

AU - Kim, Juyoung

AU - Chun, Dong Won

AU - Park, Sang Shik

AU - Roh, Jong Wook

AU - Kim, Jeongmin

N1 - Funding Information: Funding: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2019R1I1A1A01063687 and NRF-2021R1A5A8033165) and by the DGIST R&D Program (21-ET-07). Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (NRF-2019R1I1A1A01063687 and NRF-2021R1A5A8033165) and by the DGIST R&D Program (21-ET-07). Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/9

Y1 - 2021/9

N2 - We studied the variation in electrical conductivity of exfoliated RuO2 nanosheets and the modulation in the contact resistance of individual nanosheet devices using charge transfer doping effects based on surface metal nanoparticle decorations. The electrical conductivity in the mono-layer and bilayer RuO2 nanosheets gradually increased due to the surface decoration of Cu, and subsequently Ag, nanoparticles. We obtained contact resistances between the nanosheet and electrodes using the four-point and two-point probe techniques. Moreover, the contact resistances de-creased during the surface decoration processes. We established that the surface decoration of metal nanoparticles is a suitable method for external contact engineering and the modulation of the inter-nal properties of nanomaterials.

AB - We studied the variation in electrical conductivity of exfoliated RuO2 nanosheets and the modulation in the contact resistance of individual nanosheet devices using charge transfer doping effects based on surface metal nanoparticle decorations. The electrical conductivity in the mono-layer and bilayer RuO2 nanosheets gradually increased due to the surface decoration of Cu, and subsequently Ag, nanoparticles. We obtained contact resistances between the nanosheet and electrodes using the four-point and two-point probe techniques. Moreover, the contact resistances de-creased during the surface decoration processes. We established that the surface decoration of metal nanoparticles is a suitable method for external contact engineering and the modulation of the inter-nal properties of nanomaterials.

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Modulation of conductivity and contact resistance of ruo2 nanosheets via metal nano-particles surface decoration

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