Wavelength dependent graphene oxide-based optical microfiber sensor for ammonia gas
Ammonia detection in ambient air is critical, given its implication on the environment and human health. In this work, an optical fiber tapered to a 20 µm diameter and coated with graphene oxide was developed for absorbance response monitoring of ammonia at visible (500–700 nm) and near-infrared wav...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI
2021
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| Online Access: | http://psasir.upm.edu.my/id/eprint/93573/ http://psasir.upm.edu.my/id/eprint/93573/1/93573.pdf |
| _version_ | 1848861872740106240 |
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| author | Girei, Saad Hayatu Alkhabet, Mohammed Majeed Mustapha Kamil, Yasmin Lim, Hong Ngee Mahdi, Mohd Adzir Yaacob, Mohd Hanif |
| author_facet | Girei, Saad Hayatu Alkhabet, Mohammed Majeed Mustapha Kamil, Yasmin Lim, Hong Ngee Mahdi, Mohd Adzir Yaacob, Mohd Hanif |
| author_sort | Girei, Saad Hayatu |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Ammonia detection in ambient air is critical, given its implication on the environment and human health. In this work, an optical fiber tapered to a 20 µm diameter and coated with graphene oxide was developed for absorbance response monitoring of ammonia at visible (500–700 nm) and near-infrared wavelength regions (700–900 nm). The morphology, surface characteristics, and chemical composition of the graphene oxide samples were confirmed by a field emission scanning electron microscope, an atomic force microscope, X-ray diffraction, and an energy dispersion X-ray. The sensing performance of the graphene oxide-coated optical microfiber sensor towards ammonia at room temperature revealed better absorbance response at the near-infrared wavelength region compared to the visible region. The sensitivity, response and recovery times at the near-infrared wavelength region were 61.78 AU/%, 385 s, and 288 s, respectively. The sensitivity, response and recovery times at the visible wavelength region were 26.99 AU/%, 497 s, and 192 s, respectively. The selectivity of the sensor towards ammonia was affirmed with no response towards other gases. |
| first_indexed | 2025-11-15T13:08:02Z |
| format | Article |
| id | upm-93573 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T13:08:02Z |
| publishDate | 2021 |
| publisher | MDPI |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-935732025-06-25T06:40:50Z http://psasir.upm.edu.my/id/eprint/93573/ Wavelength dependent graphene oxide-based optical microfiber sensor for ammonia gas Girei, Saad Hayatu Alkhabet, Mohammed Majeed Mustapha Kamil, Yasmin Lim, Hong Ngee Mahdi, Mohd Adzir Yaacob, Mohd Hanif Ammonia detection in ambient air is critical, given its implication on the environment and human health. In this work, an optical fiber tapered to a 20 µm diameter and coated with graphene oxide was developed for absorbance response monitoring of ammonia at visible (500–700 nm) and near-infrared wavelength regions (700–900 nm). The morphology, surface characteristics, and chemical composition of the graphene oxide samples were confirmed by a field emission scanning electron microscope, an atomic force microscope, X-ray diffraction, and an energy dispersion X-ray. The sensing performance of the graphene oxide-coated optical microfiber sensor towards ammonia at room temperature revealed better absorbance response at the near-infrared wavelength region compared to the visible region. The sensitivity, response and recovery times at the near-infrared wavelength region were 61.78 AU/%, 385 s, and 288 s, respectively. The sensitivity, response and recovery times at the visible wavelength region were 26.99 AU/%, 497 s, and 192 s, respectively. The selectivity of the sensor towards ammonia was affirmed with no response towards other gases. MDPI 2021-01-14 Article PeerReviewed text en cc_by_4 http://psasir.upm.edu.my/id/eprint/93573/1/93573.pdf Girei, Saad Hayatu and Alkhabet, Mohammed Majeed and Mustapha Kamil, Yasmin and Lim, Hong Ngee and Mahdi, Mohd Adzir and Yaacob, Mohd Hanif (2021) Wavelength dependent graphene oxide-based optical microfiber sensor for ammonia gas. Sensors, 21 (2). pp. 1-11. ISSN 1424-8220 https://www.mdpi.com/1424-8220/21/2/556 |
| spellingShingle | Girei, Saad Hayatu Alkhabet, Mohammed Majeed Mustapha Kamil, Yasmin Lim, Hong Ngee Mahdi, Mohd Adzir Yaacob, Mohd Hanif Wavelength dependent graphene oxide-based optical microfiber sensor for ammonia gas |
| title | Wavelength dependent graphene oxide-based optical microfiber sensor for ammonia gas |
| title_full | Wavelength dependent graphene oxide-based optical microfiber sensor for ammonia gas |
| title_fullStr | Wavelength dependent graphene oxide-based optical microfiber sensor for ammonia gas |
| title_full_unstemmed | Wavelength dependent graphene oxide-based optical microfiber sensor for ammonia gas |
| title_short | Wavelength dependent graphene oxide-based optical microfiber sensor for ammonia gas |
| title_sort | wavelength dependent graphene oxide-based optical microfiber sensor for ammonia gas |
| url | http://psasir.upm.edu.my/id/eprint/93573/ http://psasir.upm.edu.my/id/eprint/93573/ http://psasir.upm.edu.my/id/eprint/93573/1/93573.pdf |