Rapid-Response and Wide-Range pH Sensors Enabled by Self-Assembled Functional PAni/PAA Layer on No-Core Fiber
The measurement of pH has received great attention in diverse fields, such as clinical diagnostics, environmental protection, and food safety. Optical fiber sensors are widely used for pH sensing because of their great advantages. In this work, an optical fiber pH sensor is fabricated, by combining...
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MDPI AG
2022-10-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/21/7449 |
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| author | Gang Long Liang Wan Binyun Xia Chao Zhao Kunpeng Niu Jianguo Hou Dajuan Lyu Litong Li Fangdong Zhu Ning Wang |
| author_facet | Gang Long Liang Wan Binyun Xia Chao Zhao Kunpeng Niu Jianguo Hou Dajuan Lyu Litong Li Fangdong Zhu Ning Wang |
| author_sort | Gang Long |
| collection | DOAJ |
| description | The measurement of pH has received great attention in diverse fields, such as clinical diagnostics, environmental protection, and food safety. Optical fiber sensors are widely used for pH sensing because of their great advantages. In this work, an optical fiber pH sensor is fabricated, by combining the merits of the multimode interference configuration and pH-sensitive polyaniline/polyacrylic acid (PAni/PAA) coatings, which was successfully in situ deposited on the no-core fiber (NCF) by the layer-by-layer (LBL) self-assembly method. The sensors’ performance was experimentally characterized when used for pH detection. It has a high sensitivity of 0.985 nm/pH and a great linear response in a universal pH range of 2–12. The response time and recovery time is measured to be less than 10 s. In addition, its temperature sensitivity is tested to be about 0.01 nm/°C with a low temperature crosstalk effect, which makes it promising for detecting pH in the liquid phase with temperature variation. The sensors also demonstrated easy fabrication, good stability, and repeatability, which are adapted to pH detection in most practical applications. |
| first_indexed | 2024-03-09T18:53:58Z |
| format | Article |
| id | doaj.art-9b73893e66744f8ba020e3a2f3f7be80 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T18:53:58Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-9b73893e66744f8ba020e3a2f3f7be802023-11-24T05:35:26ZengMDPI AGMaterials1996-19442022-10-011521744910.3390/ma15217449Rapid-Response and Wide-Range pH Sensors Enabled by Self-Assembled Functional PAni/PAA Layer on No-Core FiberGang Long0Liang Wan1Binyun Xia2Chao Zhao3Kunpeng Niu4Jianguo Hou5Dajuan Lyu6Litong Li7Fangdong Zhu8Ning Wang9National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, ChinaNational Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, ChinaNational Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, ChinaNational Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, ChinaNational Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, ChinaNational Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, ChinaState Key Laboratory of Optical Fiber and Cable Manufacture Technology, Yangtze Optical Fibre and Cable Joint Stock Limited Company, Wuhan 430073, ChinaState Key Laboratory of Optical Fiber and Cable Manufacture Technology, Yangtze Optical Fibre and Cable Joint Stock Limited Company, Wuhan 430073, ChinaNingbo Lianghe Road & Bridge Technology Co., Ltd., Ningbo 315201, ChinaNational Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, ChinaThe measurement of pH has received great attention in diverse fields, such as clinical diagnostics, environmental protection, and food safety. Optical fiber sensors are widely used for pH sensing because of their great advantages. In this work, an optical fiber pH sensor is fabricated, by combining the merits of the multimode interference configuration and pH-sensitive polyaniline/polyacrylic acid (PAni/PAA) coatings, which was successfully in situ deposited on the no-core fiber (NCF) by the layer-by-layer (LBL) self-assembly method. The sensors’ performance was experimentally characterized when used for pH detection. It has a high sensitivity of 0.985 nm/pH and a great linear response in a universal pH range of 2–12. The response time and recovery time is measured to be less than 10 s. In addition, its temperature sensitivity is tested to be about 0.01 nm/°C with a low temperature crosstalk effect, which makes it promising for detecting pH in the liquid phase with temperature variation. The sensors also demonstrated easy fabrication, good stability, and repeatability, which are adapted to pH detection in most practical applications.https://www.mdpi.com/1996-1944/15/21/7449no-core fiberpolyanilinepolyacrylic acidpH sensormultimode interference |
| spellingShingle | Gang Long Liang Wan Binyun Xia Chao Zhao Kunpeng Niu Jianguo Hou Dajuan Lyu Litong Li Fangdong Zhu Ning Wang Rapid-Response and Wide-Range pH Sensors Enabled by Self-Assembled Functional PAni/PAA Layer on No-Core Fiber Materials no-core fiber polyaniline polyacrylic acid pH sensor multimode interference |
| title | Rapid-Response and Wide-Range pH Sensors Enabled by Self-Assembled Functional PAni/PAA Layer on No-Core Fiber |
| title_full | Rapid-Response and Wide-Range pH Sensors Enabled by Self-Assembled Functional PAni/PAA Layer on No-Core Fiber |
| title_fullStr | Rapid-Response and Wide-Range pH Sensors Enabled by Self-Assembled Functional PAni/PAA Layer on No-Core Fiber |
| title_full_unstemmed | Rapid-Response and Wide-Range pH Sensors Enabled by Self-Assembled Functional PAni/PAA Layer on No-Core Fiber |
| title_short | Rapid-Response and Wide-Range pH Sensors Enabled by Self-Assembled Functional PAni/PAA Layer on No-Core Fiber |
| title_sort | rapid response and wide range ph sensors enabled by self assembled functional pani paa layer on no core fiber |
| topic | no-core fiber polyaniline polyacrylic acid pH sensor multimode interference |
| url | https://www.mdpi.com/1996-1944/15/21/7449 |
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