Journal article 9660 views 118 downloads
Unambiguous detection of nitrated explosive vapours by fluorescence quenching of dendrimer films
,
Paul E. Shaw
Nature Communications, Volume: 6, Start page: 8240
Swansea University Author:
Paul Meredith
-
PDF | Version of Record
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/
Download (645.04KB)
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...
| Published in: | Nature Communications |
|---|---|
| ISSN: | 2041-1723 |
| Published: |
2015
|
| Online Access: |
Check full text
|
| URI: | https://cronfa.swan.ac.uk/Record/cronfa34094 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| 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 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. |
|---|---|
| College: |
Faculty of Science and Engineering |
| Start Page: |
8240 |