Humidity‐Enhanced NO2 Gas Sensing Using Atomically Sharp Edges in Multilayer MoS2
Ambient humidity poses a significant challenge in the development of practical room‐temperature NO2 gas sensors. Herein, atomically precise zigzag edges are employed in multilayer MoS2, fabricated using electron beam lithography and anisotropic wet etching, to achieve highly sensitive and selective...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2025-04-01
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| Series: | Small Structures |
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| Online Access: | https://doi.org/10.1002/sstr.202400409 |
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| author | Abhay V. Agrawal Alexander Yu. Polyakov Jens Eriksson Tomasz J. Antosiewicz Timur O. Shegai |
| author_facet | Abhay V. Agrawal Alexander Yu. Polyakov Jens Eriksson Tomasz J. Antosiewicz Timur O. Shegai |
| author_sort | Abhay V. Agrawal |
| collection | DOAJ |
| description | Ambient humidity poses a significant challenge in the development of practical room‐temperature NO2 gas sensors. Herein, atomically precise zigzag edges are employed in multilayer MoS2, fabricated using electron beam lithography and anisotropic wet etching, to achieve highly sensitive and selective gas‐sensing performance, that is, humidity‐tolerant at elevated temperatures and humidity‐enhanced at room temperature under ultraviolet illumination. Notably, exposure to 2.5 parts per billion (ppb) NO2 at 70% relative humidity under ultraviolet illumination and at room temperature resulted in a 33‐fold increase in response and a 6‐fold faster recovery compared to 0% relative humidity, leading to response values exceeding 1100%. The optimized samples demonstrate a theoretical detection limit ranging from 4 to 400 parts per trillion (ppt) NO2. The enhanced NO2 sensing capabilities of MoS2 edges have been further confirmed through first‐principles calculations. This study expands the applications of nanostructured MoS2 and highlights its potential for detecting NO2 at sub‐ppb levels in complex scenarios, such as high‐humidity conditions. |
| format | Article |
| id | doaj-art-e0bb2cf13b5643848658741b7f74aae4 |
| institution | OA Journals |
| issn | 2688-4062 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Structures |
| spelling | doaj-art-e0bb2cf13b5643848658741b7f74aae42025-08-20T02:16:55ZengWiley-VCHSmall Structures2688-40622025-04-0164n/an/a10.1002/sstr.202400409Humidity‐Enhanced NO2 Gas Sensing Using Atomically Sharp Edges in Multilayer MoS2Abhay V. Agrawal0Alexander Yu. Polyakov1Jens Eriksson2Tomasz J. Antosiewicz3Timur O. Shegai4Department of Physics Chalmers University of Technology 412 96 Göteborg SwedenDepartment of Physics Chalmers University of Technology 412 96 Göteborg SwedenDepartment of Physics, Chemistry, and Biology Linköping University 581 83 Linköping SwedenDepartment of Physics Chalmers University of Technology 412 96 Göteborg SwedenDepartment of Physics Chalmers University of Technology 412 96 Göteborg SwedenAmbient humidity poses a significant challenge in the development of practical room‐temperature NO2 gas sensors. Herein, atomically precise zigzag edges are employed in multilayer MoS2, fabricated using electron beam lithography and anisotropic wet etching, to achieve highly sensitive and selective gas‐sensing performance, that is, humidity‐tolerant at elevated temperatures and humidity‐enhanced at room temperature under ultraviolet illumination. Notably, exposure to 2.5 parts per billion (ppb) NO2 at 70% relative humidity under ultraviolet illumination and at room temperature resulted in a 33‐fold increase in response and a 6‐fold faster recovery compared to 0% relative humidity, leading to response values exceeding 1100%. The optimized samples demonstrate a theoretical detection limit ranging from 4 to 400 parts per trillion (ppt) NO2. The enhanced NO2 sensing capabilities of MoS2 edges have been further confirmed through first‐principles calculations. This study expands the applications of nanostructured MoS2 and highlights its potential for detecting NO2 at sub‐ppb levels in complex scenarios, such as high‐humidity conditions.https://doi.org/10.1002/sstr.202400409chemiresistive gas sensingnanostructured molybdenum disulfide (MoS2)nitrogen dioxide (NO2) gas sensingrelative humiditytransition metal dichalcogenides |
| spellingShingle | Abhay V. Agrawal Alexander Yu. Polyakov Jens Eriksson Tomasz J. Antosiewicz Timur O. Shegai Humidity‐Enhanced NO2 Gas Sensing Using Atomically Sharp Edges in Multilayer MoS2 Small Structures chemiresistive gas sensing nanostructured molybdenum disulfide (MoS2) nitrogen dioxide (NO2) gas sensing relative humidity transition metal dichalcogenides |
| title | Humidity‐Enhanced NO2 Gas Sensing Using Atomically Sharp Edges in Multilayer MoS2 |
| title_full | Humidity‐Enhanced NO2 Gas Sensing Using Atomically Sharp Edges in Multilayer MoS2 |
| title_fullStr | Humidity‐Enhanced NO2 Gas Sensing Using Atomically Sharp Edges in Multilayer MoS2 |
| title_full_unstemmed | Humidity‐Enhanced NO2 Gas Sensing Using Atomically Sharp Edges in Multilayer MoS2 |
| title_short | Humidity‐Enhanced NO2 Gas Sensing Using Atomically Sharp Edges in Multilayer MoS2 |
| title_sort | humidity enhanced no2 gas sensing using atomically sharp edges in multilayer mos2 |
| topic | chemiresistive gas sensing nanostructured molybdenum disulfide (MoS2) nitrogen dioxide (NO2) gas sensing relative humidity transition metal dichalcogenides |
| url | https://doi.org/10.1002/sstr.202400409 |
| work_keys_str_mv | AT abhayvagrawal humidityenhancedno2gassensingusingatomicallysharpedgesinmultilayermos2 AT alexanderyupolyakov humidityenhancedno2gassensingusingatomicallysharpedgesinmultilayermos2 AT jenseriksson humidityenhancedno2gassensingusingatomicallysharpedgesinmultilayermos2 AT tomaszjantosiewicz humidityenhancedno2gassensingusingatomicallysharpedgesinmultilayermos2 AT timuroshegai humidityenhancedno2gassensingusingatomicallysharpedgesinmultilayermos2 |