Functionalized Carbon-Nanotubes-Based Thin-Film Transistor Sensor for Highly Selective Detection of Methane at Room Temperature
Gas sensors based on carbon nanotubes (CNTs) as channel materials have been widely considered as promising candidates for the detection of toxic gas. However, effectively detecting methane (CH<sub>4</sub>) with CNTs-based sensors remains challenging because nonpolar CH<sub>4</su...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/11/7/365 |
| _version_ | 1797589836295569408 |
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| author | Feifan Ji Jinyong Hu Yong Zhang |
| author_facet | Feifan Ji Jinyong Hu Yong Zhang |
| author_sort | Feifan Ji |
| collection | DOAJ |
| description | Gas sensors based on carbon nanotubes (CNTs) as channel materials have been widely considered as promising candidates for the detection of toxic gas. However, effectively detecting methane (CH<sub>4</sub>) with CNTs-based sensors remains challenging because nonpolar CH<sub>4</sub> molecules find it difficult to directly interact with CNTs. Herein, a functionalized CNTs-based thin-film transistor (TFT) sensor is proposed for the highly effective detection of CH<sub>4</sub> at room temperature, where CNTs with high semiconductor purity are used as the main TFT channel. The VO<sub>2</sub> and Pd nanoparticles serve as surface-active agents to modify the CNTs, and the surface-modified CNTs-based gas sensor exhibits excellent gas-sensing properties for the detection of CH<sub>4</sub>. In particular, the Pd@VO<sub>2</sub> composite-modified CNTs-based TFT sensor has excellent sensitivity to CH<sub>4</sub> in the detection range of 50 to 500 ppm. The detection limit is as low as 50 ppm, and the sensor exhibits excellent selectivity and superior repeatability. The improved gas-sensing properties of the CNTs-based gas sensor is primarily attributed to the modification of the sensitive channel that can promote the electronic interaction between CH<sub>4</sub> and gas-sensing materials. This study provides guidance for the development of high-performance CH<sub>4</sub> sensors operating at room temperature. |
| first_indexed | 2024-03-11T01:11:47Z |
| format | Article |
| id | doaj.art-8777502dd32244e99f2921fc50685236 |
| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-11T01:11:47Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Chemosensors |
| spelling | doaj.art-8777502dd32244e99f2921fc506852362023-11-18T18:47:16ZengMDPI AGChemosensors2227-90402023-06-0111736510.3390/chemosensors11070365Functionalized Carbon-Nanotubes-Based Thin-Film Transistor Sensor for Highly Selective Detection of Methane at Room TemperatureFeifan Ji0Jinyong Hu1Yong Zhang2School of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, ChinaSchool of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, ChinaSchool of Physics and Optoelectronics, Xiangtan University, Xiangtan 411105, ChinaGas sensors based on carbon nanotubes (CNTs) as channel materials have been widely considered as promising candidates for the detection of toxic gas. However, effectively detecting methane (CH<sub>4</sub>) with CNTs-based sensors remains challenging because nonpolar CH<sub>4</sub> molecules find it difficult to directly interact with CNTs. Herein, a functionalized CNTs-based thin-film transistor (TFT) sensor is proposed for the highly effective detection of CH<sub>4</sub> at room temperature, where CNTs with high semiconductor purity are used as the main TFT channel. The VO<sub>2</sub> and Pd nanoparticles serve as surface-active agents to modify the CNTs, and the surface-modified CNTs-based gas sensor exhibits excellent gas-sensing properties for the detection of CH<sub>4</sub>. In particular, the Pd@VO<sub>2</sub> composite-modified CNTs-based TFT sensor has excellent sensitivity to CH<sub>4</sub> in the detection range of 50 to 500 ppm. The detection limit is as low as 50 ppm, and the sensor exhibits excellent selectivity and superior repeatability. The improved gas-sensing properties of the CNTs-based gas sensor is primarily attributed to the modification of the sensitive channel that can promote the electronic interaction between CH<sub>4</sub> and gas-sensing materials. This study provides guidance for the development of high-performance CH<sub>4</sub> sensors operating at room temperature.https://www.mdpi.com/2227-9040/11/7/365gas sensorsCNTs-based sensorfunctionalized CNTsCH<sub>4</sub> sensorPd nanoparticle modification |
| spellingShingle | Feifan Ji Jinyong Hu Yong Zhang Functionalized Carbon-Nanotubes-Based Thin-Film Transistor Sensor for Highly Selective Detection of Methane at Room Temperature Chemosensors gas sensors CNTs-based sensor functionalized CNTs CH<sub>4</sub> sensor Pd nanoparticle modification |
| title | Functionalized Carbon-Nanotubes-Based Thin-Film Transistor Sensor for Highly Selective Detection of Methane at Room Temperature |
| title_full | Functionalized Carbon-Nanotubes-Based Thin-Film Transistor Sensor for Highly Selective Detection of Methane at Room Temperature |
| title_fullStr | Functionalized Carbon-Nanotubes-Based Thin-Film Transistor Sensor for Highly Selective Detection of Methane at Room Temperature |
| title_full_unstemmed | Functionalized Carbon-Nanotubes-Based Thin-Film Transistor Sensor for Highly Selective Detection of Methane at Room Temperature |
| title_short | Functionalized Carbon-Nanotubes-Based Thin-Film Transistor Sensor for Highly Selective Detection of Methane at Room Temperature |
| title_sort | functionalized carbon nanotubes based thin film transistor sensor for highly selective detection of methane at room temperature |
| topic | gas sensors CNTs-based sensor functionalized CNTs CH<sub>4</sub> sensor Pd nanoparticle modification |
| url | https://www.mdpi.com/2227-9040/11/7/365 |
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