Laser Chemosensor with Rapid Responsivity and Inherent Memory Based on a Polymer of Intrinsic Microporosity
This work explores the use of a polymer of intrinsic microporosity (PIM-1) as the active layer within a laser sensor to detect nitroaromatic-based explosive vapors. We show successful detection of dinitrobenzene (DNB) by monitoring the real-time photoluminescence. We also show that PIM-1 has an inhe...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2011-02-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1424-8220/11/3/2478/ |
| _version_ | 1798005924972986368 |
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| author | Graham A. Turnbull Kadhum J. Msayib Neil B. McKeown Yue Wang Ifor D. W. Samuel |
| author_facet | Graham A. Turnbull Kadhum J. Msayib Neil B. McKeown Yue Wang Ifor D. W. Samuel |
| author_sort | Graham A. Turnbull |
| collection | DOAJ |
| description | This work explores the use of a polymer of intrinsic microporosity (PIM-1) as the active layer within a laser sensor to detect nitroaromatic-based explosive vapors. We show successful detection of dinitrobenzene (DNB) by monitoring the real-time photoluminescence. We also show that PIM-1 has an inherent memory, so that it accumulates the analyte during exposure. In addition, the optical gain and refractive index of the polymer were studied by amplified spontaneous emission and variable-angle ellipsometry, respectively. A second-order distributed feedback PIM-1 laser sensor was fabricated and found to show an increase in laser threshold of 2.5 times and a reduction of the laser slope efficiency by 4.4 times after a 5-min exposure to the DNB vapor. For pumping at 2 times threshold, the lasing action was stopped within 30 s indicating that PIM-1 has a very fast responsivity and as such has a potential sensing ability for ultra-low-concentration explosives. |
| first_indexed | 2024-04-11T12:46:50Z |
| format | Article |
| id | doaj.art-cfa141418bf64abda2c29c961e29c981 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T12:46:50Z |
| publishDate | 2011-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-cfa141418bf64abda2c29c961e29c9812022-12-22T04:23:19ZengMDPI AGSensors1424-82202011-02-011132478248710.3390/s110302478Laser Chemosensor with Rapid Responsivity and Inherent Memory Based on a Polymer of Intrinsic MicroporosityGraham A. TurnbullKadhum J. MsayibNeil B. McKeownYue WangIfor D. W. SamuelThis work explores the use of a polymer of intrinsic microporosity (PIM-1) as the active layer within a laser sensor to detect nitroaromatic-based explosive vapors. We show successful detection of dinitrobenzene (DNB) by monitoring the real-time photoluminescence. We also show that PIM-1 has an inherent memory, so that it accumulates the analyte during exposure. In addition, the optical gain and refractive index of the polymer were studied by amplified spontaneous emission and variable-angle ellipsometry, respectively. A second-order distributed feedback PIM-1 laser sensor was fabricated and found to show an increase in laser threshold of 2.5 times and a reduction of the laser slope efficiency by 4.4 times after a 5-min exposure to the DNB vapor. For pumping at 2 times threshold, the lasing action was stopped within 30 s indicating that PIM-1 has a very fast responsivity and as such has a potential sensing ability for ultra-low-concentration explosives.http://www.mdpi.com/1424-8220/11/3/2478/polymer of intrinsic microporosityorganic semiconductordistributed feedback laserexplosive detectionchemosensors |
| spellingShingle | Graham A. Turnbull Kadhum J. Msayib Neil B. McKeown Yue Wang Ifor D. W. Samuel Laser Chemosensor with Rapid Responsivity and Inherent Memory Based on a Polymer of Intrinsic Microporosity Sensors polymer of intrinsic microporosity organic semiconductor distributed feedback laser explosive detection chemosensors |
| title | Laser Chemosensor with Rapid Responsivity and Inherent Memory Based on a Polymer of Intrinsic Microporosity |
| title_full | Laser Chemosensor with Rapid Responsivity and Inherent Memory Based on a Polymer of Intrinsic Microporosity |
| title_fullStr | Laser Chemosensor with Rapid Responsivity and Inherent Memory Based on a Polymer of Intrinsic Microporosity |
| title_full_unstemmed | Laser Chemosensor with Rapid Responsivity and Inherent Memory Based on a Polymer of Intrinsic Microporosity |
| title_short | Laser Chemosensor with Rapid Responsivity and Inherent Memory Based on a Polymer of Intrinsic Microporosity |
| title_sort | laser chemosensor with rapid responsivity and inherent memory based on a polymer of intrinsic microporosity |
| topic | polymer of intrinsic microporosity organic semiconductor distributed feedback laser explosive detection chemosensors |
| url | http://www.mdpi.com/1424-8220/11/3/2478/ |
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