Two-Dimensional NbS2 Gas Sensors for Selective and Reversible NO2 Detection at Room Temperature

Kim, Yeonhoo; Kwon, Ki Chang; Kang, Sungwoo; Kim, Changyeon; Kim, Tae Hoon; Hong, Seung -Pyo; Park, Seo Yun; Suh, Jun Min; Choi, Min -Ju; Han, Seungwu; Jang, Ho Won

doi:10.1021/acssensors.9b00992

Two-Dimensional NbS₂ Gas Sensors for Selective and Reversible NO₂ Detection at Room Temperature

Journal Article · Wed Jul 24 00:00:00 EDT 2019 · ACS Sensors

DOI:https://doi.org/10.1021/acssensors.9b00992· OSTI ID:1558985

^[1]; ^[2]; Kang, Sungwoo ^[3]; Kim, Changyeon ^[3]; Kim, Tae Hoon ^[3]; Hong, Seung -Pyo ^[3]; Park, Seo Yun ^[3]; ^[3]; Choi, Min -Ju ^[3]; Han, Seungwu ^[3]; ^[3]

Seoul National Univ., Seoul (Republic of Korea); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Seoul National Univ., Seoul (Republic of Korea); Chung-Ang Univ., Seoul (Republic of Korea); Shenzhen Univ., Shenzhen (China)
Seoul National Univ., Seoul (Republic of Korea)

Transition metal dichalcogenides (TMDs) have attracted enormous attention in diverse research fields. Especially, gas sensors are considered in a promising application exploiting TMDs. However, the studies are confined to only major TMDs such as MoS₂ and WS₂. Particularly, the chemoresistive sensing properties of two-dimensional (2D) NbS₂ have never been explored. For the first time, we report room temperature NO₂ sensing characteristics of 2D NbS₂ nanosheets and the sensing mechanisms using first-principles calculations based on density functional theory. The results demonstrate that the NbS₂ edges possessing different configurations depending on synthetic conditions differ in the sensing ability of the TMD nanosheets. Furthermore, this study not only broadens the potential of 2D NbS₂ for gas sensing applications, but also presents the important role of edge configuration of TMDs depending on synthetic conditions for further studies.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1558985

Report Number(s):: LA-UR--19-28229

Journal Information:: ACS Sensors, Journal Name: ACS Sensors Journal Issue: 9 Vol. 4; ISSN 2379-3694

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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