A Flexible NO<sub>2</sub> Gas Sensor Based on Single-Wall Carbon Nanotube Films Doped with a High Level of Nitrogen
Carbon nanotubes (CNTs) are considered a promising candidate for the detection of toxic gases because of their high specific surface area and excellent electrical and mechanical properties. However, the detecting performance of CNT-based detectors needs to be improved because covalently bonded CNTs...
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| Format: | Article |
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MDPI AG
2022-10-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/19/6523 |
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| author | Xiao-Han Tian Tian-Ya Zhou Yu Meng Yi-Ming Zhao Chao Shi Peng-Xiang Hou Li-Li Zhang Chang Liu Hui-Ming Cheng |
| author_facet | Xiao-Han Tian Tian-Ya Zhou Yu Meng Yi-Ming Zhao Chao Shi Peng-Xiang Hou Li-Li Zhang Chang Liu Hui-Ming Cheng |
| author_sort | Xiao-Han Tian |
| collection | DOAJ |
| description | Carbon nanotubes (CNTs) are considered a promising candidate for the detection of toxic gases because of their high specific surface area and excellent electrical and mechanical properties. However, the detecting performance of CNT-based detectors needs to be improved because covalently bonded CNTs are usually chemically inert. We prepared a nitrogen-doped single-wall CNT (SWCNT) film by means of gas-phase fluorination followed by thermal annealing in NH<sub>3</sub>. The doped nitrogen content could be changed in the range of 2.9–9.9 at%. The N-doped SWCNT films were directly used to construct flexible and transparent gas sensors, which can work at a low voltage of 0.01 V. It was found that their NO<sub>2</sub> detection performance was closely related to their nitrogen content. With an optimum nitrogen content of 9.8 at%, a flexible sensor had a detection limit of 500 ppb at room temperature with good cycling ability and stability during bending. |
| first_indexed | 2024-03-09T21:24:40Z |
| format | Article |
| id | doaj.art-6ca33ecff437480ab548489dfac03645 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T21:24:40Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-6ca33ecff437480ab548489dfac036452023-11-23T21:12:48ZengMDPI AGMolecules1420-30492022-10-012719652310.3390/molecules27196523A Flexible NO<sub>2</sub> Gas Sensor Based on Single-Wall Carbon Nanotube Films Doped with a High Level of NitrogenXiao-Han Tian0Tian-Ya Zhou1Yu Meng2Yi-Ming Zhao3Chao Shi4Peng-Xiang Hou5Li-Li Zhang6Chang Liu7Hui-Ming Cheng8Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, ChinaCarbon nanotubes (CNTs) are considered a promising candidate for the detection of toxic gases because of their high specific surface area and excellent electrical and mechanical properties. However, the detecting performance of CNT-based detectors needs to be improved because covalently bonded CNTs are usually chemically inert. We prepared a nitrogen-doped single-wall CNT (SWCNT) film by means of gas-phase fluorination followed by thermal annealing in NH<sub>3</sub>. The doped nitrogen content could be changed in the range of 2.9–9.9 at%. The N-doped SWCNT films were directly used to construct flexible and transparent gas sensors, which can work at a low voltage of 0.01 V. It was found that their NO<sub>2</sub> detection performance was closely related to their nitrogen content. With an optimum nitrogen content of 9.8 at%, a flexible sensor had a detection limit of 500 ppb at room temperature with good cycling ability and stability during bending.https://www.mdpi.com/1420-3049/27/19/6523single-wall carbon nanotubenitrogen dopingflexible sensor |
| spellingShingle | Xiao-Han Tian Tian-Ya Zhou Yu Meng Yi-Ming Zhao Chao Shi Peng-Xiang Hou Li-Li Zhang Chang Liu Hui-Ming Cheng A Flexible NO<sub>2</sub> Gas Sensor Based on Single-Wall Carbon Nanotube Films Doped with a High Level of Nitrogen Molecules single-wall carbon nanotube nitrogen doping flexible sensor |
| title | A Flexible NO<sub>2</sub> Gas Sensor Based on Single-Wall Carbon Nanotube Films Doped with a High Level of Nitrogen |
| title_full | A Flexible NO<sub>2</sub> Gas Sensor Based on Single-Wall Carbon Nanotube Films Doped with a High Level of Nitrogen |
| title_fullStr | A Flexible NO<sub>2</sub> Gas Sensor Based on Single-Wall Carbon Nanotube Films Doped with a High Level of Nitrogen |
| title_full_unstemmed | A Flexible NO<sub>2</sub> Gas Sensor Based on Single-Wall Carbon Nanotube Films Doped with a High Level of Nitrogen |
| title_short | A Flexible NO<sub>2</sub> Gas Sensor Based on Single-Wall Carbon Nanotube Films Doped with a High Level of Nitrogen |
| title_sort | flexible no sub 2 sub gas sensor based on single wall carbon nanotube films doped with a high level of nitrogen |
| topic | single-wall carbon nanotube nitrogen doping flexible sensor |
| url | https://www.mdpi.com/1420-3049/27/19/6523 |
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