Influence of Air Flow on Luminescence Quenching in Polymer Films towards Explosives Detection Using Drones
Explosive detection has become an increased priority in recent years for homeland security and counter-terrorism applications. Although drones may not be able to pinpoint the exact location of the landmines and explosives, the identification of the explosive vapor present in the surrounding air prov...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Polymers |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4360/14/3/483 |
| _version_ | 1797485295169437696 |
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| author | Daegwon Noh Emmanuel K. Ampadu Eunsoon Oh |
| author_facet | Daegwon Noh Emmanuel K. Ampadu Eunsoon Oh |
| author_sort | Daegwon Noh |
| collection | DOAJ |
| description | Explosive detection has become an increased priority in recent years for homeland security and counter-terrorism applications. Although drones may not be able to pinpoint the exact location of the landmines and explosives, the identification of the explosive vapor present in the surrounding air provides significant information and comfort to the personnel and explosives removal equipment operators. Several optical methods, such as the luminescence quenching of fluorescent polymers, have been used for explosive detection. In order to utilize sensing technique via unmanned vehicles or drones, it is very important to study how the air flow affects the luminescence quenching. We investigated the effects of air flow on the quenching efficiency of Poly(2,5-di(2′-ethylhexyl)-1,4-ethynylene) (PEE) by TNT molecules. We treated the TNT molecules incorporated into the polymer film as non-radiative recombination centers, and found that the time derivative of the non-radiative recombination rates was greater with faster air flows. Our investigations show that relatively high air flow into an optical sensing part is crucial to achieving fast PL quenching. We also found that a “continuous light excitation” condition during the exposure of TNT vapor greatly influences the PL quenching. |
| first_indexed | 2024-03-09T23:16:45Z |
| format | Article |
| id | doaj.art-8c4cfa10f7cf4b959168c88e38c52ad8 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T23:16:45Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-8c4cfa10f7cf4b959168c88e38c52ad82023-11-23T17:34:35ZengMDPI AGPolymers2073-43602022-01-0114348310.3390/polym14030483Influence of Air Flow on Luminescence Quenching in Polymer Films towards Explosives Detection Using DronesDaegwon Noh0Emmanuel K. Ampadu1Eunsoon Oh2Department of Physics, Chungnam National University, 99 Daehak-ro Yuseong-gu, Daejeon 34134, KoreaDepartment of Physics, Chungnam National University, 99 Daehak-ro Yuseong-gu, Daejeon 34134, KoreaDepartment of Physics, Chungnam National University, 99 Daehak-ro Yuseong-gu, Daejeon 34134, KoreaExplosive detection has become an increased priority in recent years for homeland security and counter-terrorism applications. Although drones may not be able to pinpoint the exact location of the landmines and explosives, the identification of the explosive vapor present in the surrounding air provides significant information and comfort to the personnel and explosives removal equipment operators. Several optical methods, such as the luminescence quenching of fluorescent polymers, have been used for explosive detection. In order to utilize sensing technique via unmanned vehicles or drones, it is very important to study how the air flow affects the luminescence quenching. We investigated the effects of air flow on the quenching efficiency of Poly(2,5-di(2′-ethylhexyl)-1,4-ethynylene) (PEE) by TNT molecules. We treated the TNT molecules incorporated into the polymer film as non-radiative recombination centers, and found that the time derivative of the non-radiative recombination rates was greater with faster air flows. Our investigations show that relatively high air flow into an optical sensing part is crucial to achieving fast PL quenching. We also found that a “continuous light excitation” condition during the exposure of TNT vapor greatly influences the PL quenching.https://www.mdpi.com/2073-4360/14/3/483conjugated polymerexplosives detectioncomputational fluid dynamicsphotoluminescence |
| spellingShingle | Daegwon Noh Emmanuel K. Ampadu Eunsoon Oh Influence of Air Flow on Luminescence Quenching in Polymer Films towards Explosives Detection Using Drones Polymers conjugated polymer explosives detection computational fluid dynamics photoluminescence |
| title | Influence of Air Flow on Luminescence Quenching in Polymer Films towards Explosives Detection Using Drones |
| title_full | Influence of Air Flow on Luminescence Quenching in Polymer Films towards Explosives Detection Using Drones |
| title_fullStr | Influence of Air Flow on Luminescence Quenching in Polymer Films towards Explosives Detection Using Drones |
| title_full_unstemmed | Influence of Air Flow on Luminescence Quenching in Polymer Films towards Explosives Detection Using Drones |
| title_short | Influence of Air Flow on Luminescence Quenching in Polymer Films towards Explosives Detection Using Drones |
| title_sort | influence of air flow on luminescence quenching in polymer films towards explosives detection using drones |
| topic | conjugated polymer explosives detection computational fluid dynamics photoluminescence |
| url | https://www.mdpi.com/2073-4360/14/3/483 |
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