A Dual-Channel MoS<sub>2</sub>-Based Selective Gas Sensor for Volatile Organic Compounds
Significant progress has been made in two-dimensional material-based sensing devices over the past decade. Organic vapor sensors, particularly those using graphene and transition metal dichalcogenides as key components, have demonstrated excellent sensitivity. These sensors are highly active because...
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MDPI AG
2024-04-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/14/7/633 |
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| author | Esra Kuş Gülay Altındemir Yusuf Kerem Bostan Cihat Taşaltın Ayse Erol Yue Wang Fahrettin Sarcan |
| author_facet | Esra Kuş Gülay Altındemir Yusuf Kerem Bostan Cihat Taşaltın Ayse Erol Yue Wang Fahrettin Sarcan |
| author_sort | Esra Kuş |
| collection | DOAJ |
| description | Significant progress has been made in two-dimensional material-based sensing devices over the past decade. Organic vapor sensors, particularly those using graphene and transition metal dichalcogenides as key components, have demonstrated excellent sensitivity. These sensors are highly active because all the atoms in the ultra-thin layers are exposed to volatile compounds. However, their selectivity needs improvement. We propose a novel gas-sensing device that addresses this challenge. It consists of two side-by-side sensors fabricated from the same active material, few-layer molybdenum disulfide (MoS₂), for detecting volatile organic compounds like alcohol, acetone, and toluene. To create a dual-channel sensor, we introduce a simple step into the conventional 2D material sensor fabrication process. This step involves treating one-half of the few-layer MoS₂ using ultraviolet–ozone (UV-O<sub>3</sub>) treatment. The responses of pristine few-layer MoS₂ sensors to 3000 ppm of ethanol, acetone, and toluene gases are 18%, 3.5%, and 49%, respectively. The UV-O<sub>3</sub>-treated few-layer MoS₂-based sensors show responses of 13.4%, 3.1%, and 6.7%, respectively. This dual-channel sensing device demonstrates a 7-fold improvement in selectivity for toluene gas against ethanol and acetone. Our work sheds light on understanding surface processes and interaction mechanisms at the interface between transition metal dichalcogenides and volatile organic compounds, leading to enhanced sensitivity and selectivity. |
| first_indexed | 2024-04-24T10:38:38Z |
| format | Article |
| id | doaj.art-f9c2f3fe313545029ca2a00f4fa5c26a |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-04-24T10:38:38Z |
| publishDate | 2024-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-f9c2f3fe313545029ca2a00f4fa5c26a2024-04-12T13:24:02ZengMDPI AGNanomaterials2079-49912024-04-0114763310.3390/nano14070633A Dual-Channel MoS<sub>2</sub>-Based Selective Gas Sensor for Volatile Organic CompoundsEsra Kuş0Gülay Altındemir1Yusuf Kerem Bostan2Cihat Taşaltın3Ayse Erol4Yue Wang5Fahrettin Sarcan6Department of Physics, Faculty of Science, Istanbul University, Vezneciler, Istanbul 34134, TurkeyMaterials Institute, TUBITAK Marmara Research Center, Gebze, Kocaeli 41470, TurkeyDepartment of Physics, Faculty of Science, Istanbul University, Vezneciler, Istanbul 34134, TurkeyMaterials Institute, TUBITAK Marmara Research Center, Gebze, Kocaeli 41470, TurkeyDepartment of Physics, Faculty of Science, Istanbul University, Vezneciler, Istanbul 34134, TurkeyDepartment of Physics, School of Physics, Engineering and Technology, University of York, York YO10 5DD, UKDepartment of Physics, Faculty of Science, Istanbul University, Vezneciler, Istanbul 34134, TurkeySignificant progress has been made in two-dimensional material-based sensing devices over the past decade. Organic vapor sensors, particularly those using graphene and transition metal dichalcogenides as key components, have demonstrated excellent sensitivity. These sensors are highly active because all the atoms in the ultra-thin layers are exposed to volatile compounds. However, their selectivity needs improvement. We propose a novel gas-sensing device that addresses this challenge. It consists of two side-by-side sensors fabricated from the same active material, few-layer molybdenum disulfide (MoS₂), for detecting volatile organic compounds like alcohol, acetone, and toluene. To create a dual-channel sensor, we introduce a simple step into the conventional 2D material sensor fabrication process. This step involves treating one-half of the few-layer MoS₂ using ultraviolet–ozone (UV-O<sub>3</sub>) treatment. The responses of pristine few-layer MoS₂ sensors to 3000 ppm of ethanol, acetone, and toluene gases are 18%, 3.5%, and 49%, respectively. The UV-O<sub>3</sub>-treated few-layer MoS₂-based sensors show responses of 13.4%, 3.1%, and 6.7%, respectively. This dual-channel sensing device demonstrates a 7-fold improvement in selectivity for toluene gas against ethanol and acetone. Our work sheds light on understanding surface processes and interaction mechanisms at the interface between transition metal dichalcogenides and volatile organic compounds, leading to enhanced sensitivity and selectivity.https://www.mdpi.com/2079-4991/14/7/6332D materialsTMDsMoS<sub>2</sub>Gas sensorvolatile organic compoundsVOC |
| spellingShingle | Esra Kuş Gülay Altındemir Yusuf Kerem Bostan Cihat Taşaltın Ayse Erol Yue Wang Fahrettin Sarcan A Dual-Channel MoS<sub>2</sub>-Based Selective Gas Sensor for Volatile Organic Compounds Nanomaterials 2D materials TMDs MoS<sub>2</sub> Gas sensor volatile organic compounds VOC |
| title | A Dual-Channel MoS<sub>2</sub>-Based Selective Gas Sensor for Volatile Organic Compounds |
| title_full | A Dual-Channel MoS<sub>2</sub>-Based Selective Gas Sensor for Volatile Organic Compounds |
| title_fullStr | A Dual-Channel MoS<sub>2</sub>-Based Selective Gas Sensor for Volatile Organic Compounds |
| title_full_unstemmed | A Dual-Channel MoS<sub>2</sub>-Based Selective Gas Sensor for Volatile Organic Compounds |
| title_short | A Dual-Channel MoS<sub>2</sub>-Based Selective Gas Sensor for Volatile Organic Compounds |
| title_sort | dual channel mos sub 2 sub based selective gas sensor for volatile organic compounds |
| topic | 2D materials TMDs MoS<sub>2</sub> Gas sensor volatile organic compounds VOC |
| url | https://www.mdpi.com/2079-4991/14/7/633 |
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