Journal
FORENSIC SCIENCE INTERNATIONAL
Volume 242, Issue -, Pages 88-93Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.forsciint.2014.06.028
Keywords
Metal organic frameworks; Europium; Quantum dots; Nanocomposite; Chemosensing; Trinitrotoluene
Categories
Funding
- CSIR, India [OMEGA/PSC0202/2.2.5]
- Department of Science and Technology (DST), India
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Luminescent metal-organic frameworks (MOFs) are considered as next-generation sensor materials for small molecules and explosives. In the present work, a nanocomposite of luminescent europium organic framework (EuOF) and CdSe quantum dots (QDs) has been first time investigated for photoluminescence (PL) based highly sensitive detection of trinitrotoluene (TNT). The nanocomposite EuOF/QD has been synthesized by initiating the growth of EuOF in the presence of QDs. The successful synthesis of the product has been verified with the help of electron microscopy, X-ray diffraction analysis, and surface area measurements. Compared to EuOF alone, the EuOF/QD nanocomposite offers reproducible and stable measurements. The linear range of PL quenching based detection of TNT with EuOF/QD nanocomposite is 5-1000 ppb with the detection limit of 3 ppb. The detection of TNT with EuOF/QD is selective with respect to some other investigated aromatic compounds, such as phenol, o-cresol, toluene, benzene, nitrobenzene and nitrophenol. (C) 2014 Elsevier Ireland Ltd. All rights reserved.
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