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Two-Dimensional NbS<sub>2</sub> Gas Sensors for Selective and Reversible NO<sub>2</sub> Detection at Room Temperature

Yeonhoo KimCenter for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87544, United StatesKi Chang KwonDepartment of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of KoreaSungwoo KangDepartment of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of KoreaChangyeon KimDepartment of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of KoreaTae‐Hoon KimDepartment of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of KoreaSeung Pyo HongDepartment of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of KoreaSeo Yun ParkDepartment of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of KoreaJun Min SuhDepartment of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of KoreaMin‐Ju ChoiDepartment of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of KoreaSeungwu HanDepartment of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of KoreaHo Won JangDepartment of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea

2019en

ABI

Annotatsiya

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. 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.

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Identifikatorlar

DOI: 10.1021/acssensors.9b00992

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