ZnO Nanorods Coated Tapered U-Shape Plastic Optical Fiber for Relative Humidity Detection
A relative humidity sensor was fabricated by exploiting an evanescent wave (EW) on a U-bent tapered plastic optical fiber (POF) coated with zinc oxide (ZnO) nanorods. The POF was tapered manually using a polishing method to a diameter of 0.5 mm, a length of 5 cm, and a radius of 5 cm. ZnO nanorods w...
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MDPI AG
2022-10-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/9/11/796 |
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| author | Siti Halma Johari Tiu Zian Cheak Hazli Rafis Abdul Rahim Mohd Hafiz Jali Haziezol Helmi Mohd Yusof Md Ashadi Md Johari Moh Yasin Sulaiman Wadi Harun |
| author_facet | Siti Halma Johari Tiu Zian Cheak Hazli Rafis Abdul Rahim Mohd Hafiz Jali Haziezol Helmi Mohd Yusof Md Ashadi Md Johari Moh Yasin Sulaiman Wadi Harun |
| author_sort | Siti Halma Johari |
| collection | DOAJ |
| description | A relative humidity sensor was fabricated by exploiting an evanescent wave (EW) on a U-bent tapered plastic optical fiber (POF) coated with zinc oxide (ZnO) nanorods. The POF was tapered manually using a polishing method to a diameter of 0.5 mm, a length of 5 cm, and a radius of 5 cm. ZnO nanorods were synthesized using a hydrothermal method and grown on the POF by a seeding process for 12 h. A significant response of the sensor was observed when the sensor was exposed to 35 to 90%RH due to the intense chemisorption process and changeable relative index in the POF. The sensitivity and resolution of the sensor have been improved by factors of 1.23 and 2.18, respectively, compared to the conventional tapered POF sensor without ZnO coating. Besides, the ZnO-coated sensor also exhibited better repeatability properties in terms of output voltage when exposed to 35 to 90%RH for three repeated measurements. The obtained results revealed that the proposed new POF sensor has an excellent sensing performance as an RH sensor in terms of sensitivity, repeatability, and stability properties. |
| first_indexed | 2024-03-09T18:44:35Z |
| format | Article |
| id | doaj.art-f13ad72c5ecc40a2ac59fc745946f9a9 |
| institution | Directory Open Access Journal |
| issn | 2304-6732 |
| language | English |
| last_indexed | 2024-03-09T18:44:35Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj.art-f13ad72c5ecc40a2ac59fc745946f9a92023-11-24T06:22:27ZengMDPI AGPhotonics2304-67322022-10-0191179610.3390/photonics9110796ZnO Nanorods Coated Tapered U-Shape Plastic Optical Fiber for Relative Humidity DetectionSiti Halma Johari0Tiu Zian Cheak1Hazli Rafis Abdul Rahim2Mohd Hafiz Jali3Haziezol Helmi Mohd Yusof4Md Ashadi Md Johari5Moh Yasin6Sulaiman Wadi Harun7Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, MalaysiaFaculty of Engineering & Quantity Surveying, INTI International University, Nilai 71800, MalaysiaFaculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia Melaka, Melaka 76100, MalaysiaFaculty of Electrical Engineering, Universiti Teknikal Malaysia Melaka, Melaka 76100, MalaysiaFaculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia Melaka, Melaka 76100, MalaysiaFaculty of Electrical and Electronic Engineering Technology, Universiti Teknikal Malaysia Melaka, Melaka 76100, MalaysiaDepartment of Physic, Faculty of Science and Technology, Airlangga University, Surabaya 60231, IndonesiaDepartment of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, MalaysiaA relative humidity sensor was fabricated by exploiting an evanescent wave (EW) on a U-bent tapered plastic optical fiber (POF) coated with zinc oxide (ZnO) nanorods. The POF was tapered manually using a polishing method to a diameter of 0.5 mm, a length of 5 cm, and a radius of 5 cm. ZnO nanorods were synthesized using a hydrothermal method and grown on the POF by a seeding process for 12 h. A significant response of the sensor was observed when the sensor was exposed to 35 to 90%RH due to the intense chemisorption process and changeable relative index in the POF. The sensitivity and resolution of the sensor have been improved by factors of 1.23 and 2.18, respectively, compared to the conventional tapered POF sensor without ZnO coating. Besides, the ZnO-coated sensor also exhibited better repeatability properties in terms of output voltage when exposed to 35 to 90%RH for three repeated measurements. The obtained results revealed that the proposed new POF sensor has an excellent sensing performance as an RH sensor in terms of sensitivity, repeatability, and stability properties.https://www.mdpi.com/2304-6732/9/11/796evanescence wave sensortapered plastic optical fiberzinc oxide nanorodshumidity sensing |
| spellingShingle | Siti Halma Johari Tiu Zian Cheak Hazli Rafis Abdul Rahim Mohd Hafiz Jali Haziezol Helmi Mohd Yusof Md Ashadi Md Johari Moh Yasin Sulaiman Wadi Harun ZnO Nanorods Coated Tapered U-Shape Plastic Optical Fiber for Relative Humidity Detection Photonics evanescence wave sensor tapered plastic optical fiber zinc oxide nanorods humidity sensing |
| title | ZnO Nanorods Coated Tapered U-Shape Plastic Optical Fiber for Relative Humidity Detection |
| title_full | ZnO Nanorods Coated Tapered U-Shape Plastic Optical Fiber for Relative Humidity Detection |
| title_fullStr | ZnO Nanorods Coated Tapered U-Shape Plastic Optical Fiber for Relative Humidity Detection |
| title_full_unstemmed | ZnO Nanorods Coated Tapered U-Shape Plastic Optical Fiber for Relative Humidity Detection |
| title_short | ZnO Nanorods Coated Tapered U-Shape Plastic Optical Fiber for Relative Humidity Detection |
| title_sort | zno nanorods coated tapered u shape plastic optical fiber for relative humidity detection |
| topic | evanescence wave sensor tapered plastic optical fiber zinc oxide nanorods humidity sensing |
| url | https://www.mdpi.com/2304-6732/9/11/796 |
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