Self-assembled polyaniline nanostructures in-situ deposited on silica optical fibers for ammonia gas sensing
Optical fibers coated with polyaniline (PANI) nanostructures were used to sense ammonia gas (NH3) concentration. The PANI nanostructures were synthesized using the oxidative polymerization process in a solution containing poly(methyl vinyl ether-alt-maleic acid) (PMVEA). The PANI nanostructures were...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022
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| Online Access: | http://psasir.upm.edu.my/id/eprint/103160/ http://psasir.upm.edu.my/id/eprint/103160/1/103160.pdf |
| _version_ | 1848863949125058560 |
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| author | Ibrahim, Siti Azlida Abdul Rahman, Norizah Yaacob, Mohd Hanif Abu Bakar, Muhammad Hafiz |
| author_facet | Ibrahim, Siti Azlida Abdul Rahman, Norizah Yaacob, Mohd Hanif Abu Bakar, Muhammad Hafiz |
| author_sort | Ibrahim, Siti Azlida |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Optical fibers coated with polyaniline (PANI) nanostructures were used to sense ammonia gas (NH3) concentration. The PANI nanostructures were synthesized using the oxidative polymerization process in a solution containing poly(methyl vinyl ether-alt-maleic acid) (PMVEA). The PANI nanostructures were in situ deposited on silica optical fibers by immersing the fibers in the solution during the polymerization process for specific durations. The morphology and the thickness of the PANI nanostructure coatings were characterized using Scanning Electron Microscopy (SEM). Raman and Fourier Transform Infra-red (FTIR) spectra confirmed that the PANI nanostructures were in the emeraldine salt (ES) state. The sensors were exposed to various concentrations of NH3 gas at room temperature. The sensor with a coating thickness of 639 nm shows the highest response with a cumulative absorbance response of 2.2 towards 1% NH3 in synthetic air. The response and recovery times are 2.82 min and 11.52 min, respectively. |
| first_indexed | 2025-11-15T13:41:02Z |
| format | Article |
| id | upm-103160 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T13:41:02Z |
| publishDate | 2022 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1031602024-11-20T06:29:50Z http://psasir.upm.edu.my/id/eprint/103160/ Self-assembled polyaniline nanostructures in-situ deposited on silica optical fibers for ammonia gas sensing Ibrahim, Siti Azlida Abdul Rahman, Norizah Yaacob, Mohd Hanif Abu Bakar, Muhammad Hafiz Optical fibers coated with polyaniline (PANI) nanostructures were used to sense ammonia gas (NH3) concentration. The PANI nanostructures were synthesized using the oxidative polymerization process in a solution containing poly(methyl vinyl ether-alt-maleic acid) (PMVEA). The PANI nanostructures were in situ deposited on silica optical fibers by immersing the fibers in the solution during the polymerization process for specific durations. The morphology and the thickness of the PANI nanostructure coatings were characterized using Scanning Electron Microscopy (SEM). Raman and Fourier Transform Infra-red (FTIR) spectra confirmed that the PANI nanostructures were in the emeraldine salt (ES) state. The sensors were exposed to various concentrations of NH3 gas at room temperature. The sensor with a coating thickness of 639 nm shows the highest response with a cumulative absorbance response of 2.2 towards 1% NH3 in synthetic air. The response and recovery times are 2.82 min and 11.52 min, respectively. Elsevier 2022 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/103160/1/103160.pdf Ibrahim, Siti Azlida and Abdul Rahman, Norizah and Yaacob, Mohd Hanif and Abu Bakar, Muhammad Hafiz (2022) Self-assembled polyaniline nanostructures in-situ deposited on silica optical fibers for ammonia gas sensing. Synthetic Metals, 283. art. no. 116962. pp. 1-8. ISSN 0379-6779 https://www.sciencedirect.com/science/article/pii/S037967792100268X 10.1016/j.synthmet.2021.116962 |
| spellingShingle | Ibrahim, Siti Azlida Abdul Rahman, Norizah Yaacob, Mohd Hanif Abu Bakar, Muhammad Hafiz Self-assembled polyaniline nanostructures in-situ deposited on silica optical fibers for ammonia gas sensing |
| title | Self-assembled polyaniline nanostructures in-situ deposited on silica optical fibers for ammonia gas sensing |
| title_full | Self-assembled polyaniline nanostructures in-situ deposited on silica optical fibers for ammonia gas sensing |
| title_fullStr | Self-assembled polyaniline nanostructures in-situ deposited on silica optical fibers for ammonia gas sensing |
| title_full_unstemmed | Self-assembled polyaniline nanostructures in-situ deposited on silica optical fibers for ammonia gas sensing |
| title_short | Self-assembled polyaniline nanostructures in-situ deposited on silica optical fibers for ammonia gas sensing |
| title_sort | self-assembled polyaniline nanostructures in-situ deposited on silica optical fibers for ammonia gas sensing |
| url | http://psasir.upm.edu.my/id/eprint/103160/ http://psasir.upm.edu.my/id/eprint/103160/ http://psasir.upm.edu.my/id/eprint/103160/ http://psasir.upm.edu.my/id/eprint/103160/1/103160.pdf |