| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Nicdaeid, Niamh
University of Dundee
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2024Heavy metal-free MnInPSeS alloyed quantum dots-molecularly imprinted polymer as an electrochemical nanosensor for the detection of the synthetic cathinone, 3,4-methylenedioxypyrovaleronecitations
- 2023Cadmium-free silica-encapsulated molecularly imprinted AuZnCeSeS quantum dots nanocomposite as an ultrasensitive fluorescence nanosensor for methamphetamine detectioncitations
- 2022Thiolated gamma-cyclodextrin-polymer-functionalized CeFe3O4 magnetic nanocomposite as an intrinsic nanocatalyst for the selective and ultrasensitive colorimetric detection of triacetone triperoxidecitations
- 2022Alloyed AuFeZnSe quantum dots@gold nanorod nanocomposite as an ultrasensitive and selective plasmon-amplified fluorescence OFF-ON aptasensor for arsenic (III)citations
- 2022Fabrication of a near-infrared fluorescence-emitting SiO2-AuZnFeSeS quantum dots-molecularly imprinted polymer nanocomposite for the ultrasensitive fluorescence detection of levamisolecitations
- 2021Polymeric-coated Fe-doped ceria/gold hybrid nanocomposite as an aptasensor for the catalytic enhanced colorimetric detection of 2,4-dinitrophenolcitations
- 2020Aptamer-based cocaine assay using a nanohybrid composed of ZnS/Ag2Se quantum dots, graphene oxide and gold nanoparticles as a fluorescent probecitations
- 2019Multi-shaped cationic gold nanoparticle-L-cysteine-ZnSeS quantum dots hybrid nanozyme as an intrinsic peroxidase mimic for the rapid colorimetric detection of cocainecitations
- 2016A thermoanalytical, X-ray diffraction and petrographic approach to the forensic assessment of fire affected concrete in the United Arab Emiratescitations
- 2016Nondestructive Handheld Fourier Transform Infrared (FT-IR) Analysis of Spectroscopic Changes and Multivariate Modeling of Thermally Degraded Plain Portland Cement Concrete and its Slag and Fly Ash-Based Analogscitations
- 2011The recoverability of fingerprints on nonporous surfaces exposed to elevated temperatures
- 2009Evaluation of available techniques for the recovery of latent fingerprints from untreated plywood surfaces
- 2008Recovery of fingerprints from arson scenes
- 2008Comparison of vacuum metal deposition and powder suspension for recovery of fingerprints on wetted nonporous surfaces
Places of action
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article
Alloyed AuFeZnSe quantum dots@gold nanorod nanocomposite as an ultrasensitive and selective plasmon-amplified fluorescence OFF-ON aptasensor for arsenic (III)
Abstract
According to documented reports, more than 200 million people across the globe are exposed to arsenic (As) contamination at levels above the World Health Organization (WHO) guideline limit of 10 μg/L. In this work, a novel fluorescence OFF-ON ultrasensitive aptasensor was developed for As (III). To construct the fluorescence aptasensor, AuFeZnSe alloyed quantum dots (QDs) were newly synthesized and surface-coated with amphiphilic polymers (Amp-P) to render the QDs biocompatible and stable. Thereafter, cationic gold nanorods (AuNRs) were electrostatically bonded to the Amp-P-QDs to form an Amp-P-QDs-AuNR nanocomposite which switched OFF the fluorescence of the bound QDs. Thiolated anti-As (III) DNA aptamer (Apt) was thereafter assembled on the Amp-P-QDs-AuNR surface to form a Amp-P-Apt-QDs-AuNR probe. The affinity binding interaction between the targeted As (III) concentration and the Apt, triggered localized surface plasmon resonance (LSPR) from AuNRs to amplify the fluorescence intensity signal, thereby switching ON the fluorescence of the bound Amp-P-QDs. Comparison of the Amp-P-Apt-QDs and the Amp-P-Apt-QDs-AuNR probes, showed that the presence of AuNR enhanced the fluorescence of the bound Amp-P-QDs for As (III) by as much as 230%, representing an ∼20-fold increase over the Amp-P-Apt-QDs probe without AuNRs. Under optimum conditions, As (III) was selectively and quantitatively detected with ultra-high sensitivity. The linear range was 0.01–100 μg/L, while the obtained detection limit of 0.01 μg/L (69.12 pM) was 1000 times lower than the WHO recommended limit. We successfully applied the Amp-P-Apt-QDs-AuNR probe to detect As (III) in environmental and biological samples with analytical recoveries from ∼93 to 105%.