Functionalized CdSe/ZnS QDs for the detection of nitroaromatic or RDX explosives.

Freeman, Ronit; Finder, Tali; Bahshi, Lily; Gill, Ron; Willner, Itamar · Adv Mater · 2012

basic_science · Level V

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Abstract

Chemically modified CdSe/ZnS quantum dots (QDs) are used as fluorescent probes for the analysis of explosives, and specifically, the detection of trinitrotoluene (TNT) or trinitrotriazine (RDX). The QDs are functionalized with electron-donating ligands that bind nitro-containing explosives, exhibiting electron-acceptor properties, to the QD surface, via supramolecular donor-acceptor interactions leading to the quenching of the luminescence of the QDs.

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