Application of Zinc Sulfide Quantum Dots for Optical Sensing

The luminescent sensory systems based on manganese-doped zinc sulfide quantum dots were developed for aqueous environment monitoring. The structural, optical and sensory characteristics of quantum dots were investigated. The mechanism of ZnS:Mn2+ interaction with methane in the aqueous media, as well as factors that have a primary influence on the formation of the sensory response in the reaction with methane, were determined.

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Enhanced fluorescence of mercaptopropionic acid capped zinc sulfide quantum dots with moxifloxacin in food and water samples via reductive photoinduced electron transfer

Environmental Science Nano ◽

10.1039/d1en00483b ◽

2021 ◽

Author(s):

Reena K Sajwan ◽

Shailja Pandey ◽

Rahul Kumar ◽

Tarun Kumar Dhiman ◽

Sergei A. Eremin ◽

...

Keyword(s):

Quantum Dots ◽

Electron Transfer ◽

Zinc Sulfide ◽

Water Samples ◽

Photoinduced Electron Transfer ◽

Optical Sensing ◽

Enhanced Fluorescence ◽

Promising Technique ◽

Mercaptopropionic Acid ◽

Food And Water Samples

Fluorescence is a promising technique adopted as a large number of optical sensing probes. Here, a facile and rapid fluorometric 3-mercaptopropionic acid capped zinc sulfide (MZnS) quantum dots (QDs) based...

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Optical sensing of 3-phenoxybenzoic acid as a pyrethroid pesticides exposure marker by surface imprinting polymer capped on manganese-doped zinc sulfide quantum dots

Analytical Chemistry Research ◽

10.1016/j.ancr.2015.06.002 ◽

2015 ◽

Vol 5 ◽

pp. 21-27 ◽

Cited By ~ 6

Author(s):

Vivek Pandey ◽

Abhishek Chauhan ◽

Gajanan Pandey ◽

Mohana Krishna Reddy Mudiam

Keyword(s):

Quantum Dots ◽

Zinc Sulfide ◽

Optical Sensing ◽

Surface Imprinting ◽

Pyrethroid Pesticides ◽

Pesticides Exposure

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Fast sonochemically-assisted synthesis of pure and doped zinc sulfide quantum dots and their applicability in organic dye removal from aqueous media

Journal of Photochemistry and Photobiology B Biology ◽

10.1016/j.jphotobiol.2018.02.016 ◽

2018 ◽

Vol 181 ◽

pp. 98-105 ◽

Cited By ~ 36

Author(s):

Hamid Reza Rajabi ◽

Fatemeh Karimi ◽

Hossein Kazemdehdashti ◽

Leila Kavoshi

Keyword(s):

Quantum Dots ◽

Zinc Sulfide ◽

Dye Removal ◽

Aqueous Media ◽

Organic Dye

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Mixed Mercaptocarboxylic Acid Shells Provide Stable Dispersions of InPZnS/ZnSe/ZnS Multishell Quantum Dots in Aqueous Media

Nanomaterials ◽

10.3390/nano10091858 ◽

2020 ◽

Vol 10 (9) ◽

pp. 1858

Author(s):

Benjamin Heyne ◽

Kristin Arlt ◽

André Geßner ◽

Alexander F. Richter ◽

Markus Döblinger ◽

...

Keyword(s):

Quantum Dots ◽

Zinc Sulfide ◽

Ligand Exchange ◽

Shell Thickness ◽

Aqueous Media ◽

Mixed Ligand ◽

Mixing Ratio ◽

Ambient Conditions ◽

Ligand Exchange Reaction ◽

Synthetic Ligand

Highly luminescent indium phosphide zinc sulfide (InPZnS) quantum dots (QDs), with zinc selenide/zinc sulfide (ZnSe/ZnS) shells, were synthesized. The QDs were modified via a post-synthetic ligand exchange reaction with 3-mercaptopropionic acid (MPA) and 11-mercaptoundecanoic acid (MUA) in different MPA:MUA ratios, making this study the first investigation into the effects of mixed ligand shells on InPZnS QDs. Moreover, this article also describes an optimized method for the correlation of the QD size vs. optical absorption of the QDs. Upon ligand exchange, the QDs can be dispersed in water. Longer ligands (MUA) provide more stable dispersions than short-chain ligands. Thicker ZnSe/ZnS shells provide a better photoluminescence quantum yield (PLQY) and higher emission stability upon ligand exchange. Both the ligand exchange and the optical properties are highly reproducible between different QD batches. Before dialysis, QDs with a ZnS shell thickness of ~4.9 monolayers (ML), stabilized with a mixed MPA:MUA (mixing ratio of 1:10), showed the highest PLQY, at ~45%. After dialysis, QDs with a ZnS shell thickness of ~4.9 ML, stabilized with a mixed MPA:MUA and a ratio of 1:10 and 1:100, showed the highest PLQYs, of ~41%. The dispersions were stable up to 44 days at ambient conditions and in the dark. After 44 days, QDs with a ZnS shell thickness of ~4.9 ML, stabilized with only MUA, showed the highest PLQY, of ~34%.

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Manganese-Doped Zinc Sulfide Quantum Dots for Methane Detection in Aqueous Media

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.386.229 ◽

2018 ◽

Vol 386 ◽

pp. 229-235

Author(s):

Alexander A. Sergeev ◽

Ksenia A. Sergeeva ◽

Andrei A. Leonov ◽

Irina V. Postnova ◽

Sergey S. Voznesenskiy ◽

...

Keyword(s):

Quantum Dots ◽

Zinc Sulfide ◽

Photoinduced Electron Transfer ◽

Room Temperature ◽

Aqueous Media ◽

Sensor Response ◽

Sensing Element ◽

Luminescent Sensor ◽

Methane Detection ◽

Luminescent Sensing

A simple aqueous based synthesis technique at room temperature was performed for preparation manganese-doped zinc sulfide quantum dots. Under 4 eV excitation quantum dots show photoluminescence bands at 2.11 and 3.1 eV corresponded to Mn2+and intrinsic ZnS emission respectively. ZnS quantum dots were used as the luminescent sensing element for methane detection in aqueous media. The luminescent sensor response occurs due to photoinduced electron transfer from QDs to methane molecule resulting in QD luminescence quenching.

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Terbium(iii)-coated carbon quantum dots for the detection of clomipramine through aggregation-induced emission from the analyte

New Journal of Chemistry ◽

10.1039/d0nj01814g ◽

2020 ◽

Vol 44 (25) ◽

pp. 10536-10544 ◽

Cited By ~ 2

Author(s):

Gurpreet Kaur ◽

Monika Chaudhary ◽

Kailash C. Jena ◽

Narinder Singh

Keyword(s):

Quantum Dots ◽

Aqueous Media ◽

Antidepressant Drug ◽

Carbon Quantum Dots ◽

Aggregation Induced Emission ◽

Coated Carbon

CQD-Tb: a selective chemosensor for detecting the antidepressant drug clomipramine in aqueous media.

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Molecularly Imprinted Polymers for Selective Adsorption of Cholesterol from Aqueous Environment

e-Polymers ◽

10.1515/epoly.2007.7.1.139 ◽

2007 ◽

Vol 7 (1) ◽

Cited By ~ 1

Author(s):

Francesco Puoci ◽

Francesca Iemma ◽

Giuseppe Cirillo ◽

Sonia Trombino ◽

Roberta Cassano ◽

...

Keyword(s):

Molecularly Imprinted Polymers ◽

Selective Adsorption ◽

Aqueous Media ◽

Aqueous Environment ◽

Polar Solvents ◽

Molecularly Imprinted ◽

Imprinted Polymers ◽

Bond Forming ◽

Preparation And Evaluation ◽

Templating Effect

AbstractIn this work the preparation and evaluation of molecularly imprinted polymers (MIPs) based on 2-hydroxyethylmetacrylate (HEMA) for selective recovery of cholesterol from aqueous media are reported. HEMA was used as functional monomer in order to maximize the hydrogen bond forming both in prepolymerization complex and in rebinding experiments which were performed in polar solvents; in particular, an acetonitrile:water (7:3 v/v) mixture was employed. The templating effect is clearly seen in the capacity of the synthesized polymers to bind cholesterol, and their selectivity was evaluated using two steroids quite similar to cholesterol such as progesterone and hydrocortisone which are less effectively bound by the matrices.

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