Laser chemosensor with rapid responsivity and inherent memory based on a polymer of intrinsic microporosity

Yue Wang; Neil B. McKeown; Kadhum J. Msayib; Graham A. Turnbull; Ifor D. W. Samuel

doi:10.3390/s110302478

Laser chemosensor with rapid responsivity and inherent memory based on a polymer of intrinsic microporosity

Yue Wang, Neil B. McKeown, Kadhum J. Msayib, Graham A. Turnbull, Ifor D. W. Samuel

Research output: Contribution to journal › Article › peer-review

65 Citations (Scopus)

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.

Original language	English
Pages (from-to)	2478-2487
Number of pages	10
Journal	Sensors
Volume	11
Issue number	3
Early online date	28 Feb 2011
DOIs	https://doi.org/10.3390/s110302478
Publication status	Published - Mar 2011

Keywords

Polymer of intrinsic microporosity
Organic semiconductor
Distributed feedback laser
Explosive detection
Chemosensors
Conjugated polymers
Explosives
Membranes
Sensors

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10.3390/s110302478

Wang2011Sensors 11 02478 v3
© 2011 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
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title = "Laser chemosensor with rapid responsivity and inherent memory based on a polymer of intrinsic microporosity",

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.",

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AU - Wang, Yue

AU - McKeown, Neil B.

AU - Msayib, Kadhum J.

AU - Turnbull, Graham A.

AU - Samuel, Ifor D. W.

PY - 2011/3

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N2 - 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.

AB - 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.

KW - Polymer of intrinsic microporosity

KW - Organic semiconductor

KW - Distributed feedback laser

KW - Explosive detection

KW - Chemosensors

KW - Conjugated polymers

KW - Explosives

KW - Membranes

KW - Sensors

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DO - 10.3390/s110302478

M3 - Article

SN - 1424-8220

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SP - 2478

EP - 2487

JO - Sensors

JF - Sensors

IS - 3

ER -

Laser chemosensor with rapid responsivity and inherent memory based on a polymer of intrinsic microporosity

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Keywords

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