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Laser Chemosensor with Rapid Responsivity and Inherent Memory Based on a Polymer of Intrinsic Microporosity

Wang, Yue, McKeown, Neil B., Msayib, Kadhum, Turnbull, Graham A. and Samuel, Ifor D. W. 2011. Laser Chemosensor with Rapid Responsivity and Inherent Memory Based on a Polymer of Intrinsic Microporosity. Sensors 11 (3) , pp. 2478-2487. 10.3390/s110302478

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Abstract

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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Uncontrolled Keywords: polymer of intrinsic microporosity; organic semiconductor; distributed feedback laser; explosive detection; chemosensors
Additional Information: Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/1424-8220/ (accessed 19/02/2014).
Publisher: MDPI Publishing
ISSN: 1424-8220
Date of First Compliant Deposit: 30 March 2016
Last Modified: 22 May 2023 10:08
URI: https://orca.cardiff.ac.uk/id/eprint/13932

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