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Unambiguous detection of nitrated explosive vapours by fluorescence quenching of dendrimer films

Yan Geng, Mohammad A. Ali, Andrew J. Clulow, Shengqiang Fan, Paul L. Burn, Ian R. Gentle, Paul Meredith Orcid Logo, Paul E. Shaw

Nature Communications, Volume: 6, Start page: 8240

Swansea University Author: Paul Meredith Orcid Logo

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DOI (Published version): 10.1038/ncomms9240

Abstract

Unambiguous and selective standoff (non-contact) infield detection of nitro-containingexplosives and taggants is an important goal but difficult to achieve with standard analyticaltechniques. Oxidative fluorescence quenching is emerging as a high sensitivity method fordetecting such materials but is...

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Published in: Nature Communications
ISSN: 2041-1723
Published: 2015
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URI: https://cronfa.swan.ac.uk/Record/cronfa34094
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last_indexed 2018-02-09T05:23:54Z
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spelling 2017-07-26T12:30:52.4489310 v2 34094 2017-05-31 Unambiguous detection of nitrated explosive vapours by fluorescence quenching of dendrimer films 31e8fe57fa180d418afd48c3af280c2e 0000-0002-9049-7414 Paul Meredith Paul Meredith true false 2017-05-31 SPH Unambiguous and selective standoff (non-contact) infield detection of nitro-containingexplosives and taggants is an important goal but difficult to achieve with standard analyticaltechniques. Oxidative fluorescence quenching is emerging as a high sensitivity method fordetecting such materials but is prone to false positives—everyday items such as perfumeselicit similar responses. Here we report thin films of light-emitting dendrimers that detectvapours of explosives and taggants selectively—fluorescence quenching is not observed for arange of common interferents. Using a combination of neutron reflectometry, quartz crystalmicrobalance and photophysical measurements we show that the origin of the selectivity isprimarily electronic and not the diffusion kinetics of the analyte or its distribution in the film.The results are a major advance in the development of sensing materials for the standoffdetection of nitro-based explosive vapours, and deliver significant insights into the physicalprocesses that govern the sensing efficacy. Journal Article Nature Communications 6 8240 2041-1723 15 9 2015 2015-09-15 10.1038/ncomms9240 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2017-07-26T12:30:52.4489310 2017-05-31T15:48:18.3458629 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Yan Geng 1 Mohammad A. Ali 2 Andrew J. Clulow 3 Shengqiang Fan 4 Paul L. Burn 5 Ian R. Gentle 6 Paul Meredith 0000-0002-9049-7414 7 Paul E. Shaw 8 0034094-31052017154851.pdf publishedv3.pdf 2017-05-31T15:48:51.7470000 Output 635612 application/pdf Version of Record true 2017-05-31T00:00:00.0000000 This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ true eng
title Unambiguous detection of nitrated explosive vapours by fluorescence quenching of dendrimer films
spellingShingle Unambiguous detection of nitrated explosive vapours by fluorescence quenching of dendrimer films
Paul Meredith
title_short Unambiguous detection of nitrated explosive vapours by fluorescence quenching of dendrimer films
title_full Unambiguous detection of nitrated explosive vapours by fluorescence quenching of dendrimer films
title_fullStr Unambiguous detection of nitrated explosive vapours by fluorescence quenching of dendrimer films
title_full_unstemmed Unambiguous detection of nitrated explosive vapours by fluorescence quenching of dendrimer films
title_sort Unambiguous detection of nitrated explosive vapours by fluorescence quenching of dendrimer films
author_id_str_mv 31e8fe57fa180d418afd48c3af280c2e
author_id_fullname_str_mv 31e8fe57fa180d418afd48c3af280c2e_***_Paul Meredith
author Paul Meredith
author2 Yan Geng
Mohammad A. Ali
Andrew J. Clulow
Shengqiang Fan
Paul L. Burn
Ian R. Gentle
Paul Meredith
Paul E. Shaw
format Journal article
container_title Nature Communications
container_volume 6
container_start_page 8240
publishDate 2015
institution Swansea University
issn 2041-1723
doi_str_mv 10.1038/ncomms9240
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 1
active_str 0
description Unambiguous and selective standoff (non-contact) infield detection of nitro-containingexplosives and taggants is an important goal but difficult to achieve with standard analyticaltechniques. Oxidative fluorescence quenching is emerging as a high sensitivity method fordetecting such materials but is prone to false positives—everyday items such as perfumeselicit similar responses. Here we report thin films of light-emitting dendrimers that detectvapours of explosives and taggants selectively—fluorescence quenching is not observed for arange of common interferents. Using a combination of neutron reflectometry, quartz crystalmicrobalance and photophysical measurements we show that the origin of the selectivity isprimarily electronic and not the diffusion kinetics of the analyte or its distribution in the film.The results are a major advance in the development of sensing materials for the standoffdetection of nitro-based explosive vapours, and deliver significant insights into the physicalprocesses that govern the sensing efficacy.
published_date 2015-09-15T03:42:18Z
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