UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Multichannel Detection and Differentiation of Explosives with a Quantum Dot Array

Peveler, WJ; Roldan, A; Hollingsworth, N; Porter, MJ; Parkin, IP; (2015) Multichannel Detection and Differentiation of Explosives with a Quantum Dot Array. ACS Nano , 10 (1) pp. 1139-1146. 10.1021/acsnano.5b06433. Green open access

[thumbnail of acsnano%2E5b06433.pdf]
Preview
Text
acsnano%2E5b06433.pdf - Published Version

Download (2MB) | Preview

Abstract

The sensing and differentiation of explosive molecules is key for both security and environmental monitoring. Single fluorophores are a widely used tool for explosives detection, but a fluorescent array is a more powerful tool for detecting and differentiating such molecules. By combining array elements into a single multichannel platform, faster results can be obtained from smaller amounts of sample. Here, five explosives are detected and differentiated using quantum dots as luminescent probes in a multichannel platform: 2,4-dinitrotoluene (DNT), 2,4,6-trinitrotoluene (TNT), tetryl (2,4,6-trinitrophenylmethylnitramine), cyclotrimethylenetrinitramine (RDX), and pentaerythritol tetranitrate (PETN). The sharp, variable emissions of the quantum dots, from a single excitation wavelength, make them ideal for such a system. Each color quantum dot is functionalized with a different surface receptor via a facile ligation process. These receptors undergo nonspecific interactions with the explosives, inducing variable fluorescence quenching of the quantum dots. Pattern analysis of the fluorescence quenching data allows for explosive detection and identification with limits-of-detection in the ppb range.

Type: Article
Title: Multichannel Detection and Differentiation of Explosives with a Quantum Dot Array
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acsnano.5b06433
Publisher version: http://dx.doi.org/10.1021/acsnano.5b06433
Language: English
Additional information: ACS AuthorChoice - This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Keywords: TNT, explosive, luminescence, multichannel, quantum dot, sensor
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/1473113
Downloads since deposit
126Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item