Detection of ascorbic acid using green synthesized AgInS2 quantum dots

May, Bambesiwe M.; Parani, Sundararajan; Oluwafemi, Oluwatobi S.

doi:10.1016/j.matlet.2018.10.155

Cited by 49 publications

(15 citation statements)

References 14 publications

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“…This can be explained with the capacity of the ascorbic acid to form chelates with metals such as silver, which leads to the elimination of dangling bonds on the QDs surface, its passivation, and enhancement of the emission signal. The methodology reached a limit of detection of 26 nmol L −1 [ 55 ].…”

Section: Sensing Schemesmentioning

confidence: 99%

“…In general, methodologies based on QDs obtained lower LOD when using nanoparticles with higher %QY values. As an example, the use of CuInS 2 QDs in the analysis of ascorbic acid reaches a limit of detection of 0.05 µM, while its analysis employing AgInS 2 improves the LOD to 50 nM [ 55 , 85 ]. A similar response is observed in detection of Cu 2+ in which the LOD obtained are 0.1 µM and 15 nM using CuInS 2 and AgInS 2 , respectively [ 60 , 86 ].…”

Section: Sensing Schemesmentioning

confidence: 99%

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Ternary Quantum Dots in Chemical Analysis. Synthesis and Detection Mechanisms

et al. 2021

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Ternary quantum dots (QDs) are novel nanomaterials that can be used in chemical analysis due their unique physicochemical and spectroscopic properties. These properties are size-dependent and can be adjusted in the synthetic protocol modifying the reaction medium, time, source of heat, and the ligand used for stabilization. In the last decade, several spectroscopic methods have been developed for the analysis of organic and inorganic analytes in biological, drug, environmental, and food samples, in which different sensing schemes have been applied using ternary quantum dots. This review addresses the different synthetic approaches of ternary quantum dots, the sensing mechanisms involved in the analyte detection, and the predominant areas in which these nanomaterials are used.

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Section: Sensing Schemesmentioning

confidence: 99%

Section: Sensing Schemesmentioning

confidence: 99%

Ternary Quantum Dots in Chemical Analysis. Synthesis and Detection Mechanisms

et al. 2021

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“…An attractive and promising approach for the sensing of environmental pollutants involves using an optical method, which offers many advantages over other standard detection techniques, including cost-effectiveness, good portability and high sensitivity as well as selectivity [14]. Among different materials used in sensing organic pollutants, QDs have appeared to be the most promising materials because of their unique properties.…”

Section: Quantum Dots In Sensing Applicationsmentioning

confidence: 99%

“…Among different materials used in sensing organic pollutants, QDs have appeared to be the most promising materials because of their unique properties. Quantum dots (QDs) are zero-dimensional nanostructured materials with excellent optoelectronic properties [14]. Zero-dimensional nanostructured materials exist in different groups, such as semiconductor quantum dots, carbon quantum dots and graphene quantum dots.…”

Section: Quantum Dots In Sensing Applicationsmentioning

confidence: 99%

Synthetic Approaches, Modification Strategies and the Application of Quantum Dots in the Sensing of Priority Pollutants

Maluleke

Oluwafemi

2021

Applied Sciences

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Polycyclic aromatic hydrocarbons (PAHs) and nitro-aromatic compounds (NACs) are two classifications of environmental pollutants that have become a source of health concerns. As a result, there have been several efforts towards the development of analytical methods that are efficient and affordable that can sense these pollutants. In recent decades, a wide range of techniques has been developed for the detection of pollutants present in the environment. Among these different techniques, the use of semiconductor nanomaterials, also known as quantum dots, has continued to gain more attention in sensing because of the optical properties that make them useful in the identification and differentiation of pollutants in water bodies. Reported studies have shown great improvement in the sensing of these pollutants. This review article starts with an introduction on two types of organic pollutants, namely polycyclic aromatic hydrocarbons and nitro-aromatic explosives. This is then followed by different quantum dots used in sensing applications. Then, a detailed discussion on different groups of quantum dots, such as carbon-based quantum dots, binary and ternary quantum dots and quantum dot composites, and their application in the sensing of organic pollutants is presented. Different studies on the comparison of water-soluble quantum dots and organic-soluble quantum dots of a fluorescence sensing mechanism are reviewed. Then, different approaches on the improvement of their sensitivity and selectivity in addition to challenges associated with some of these approaches are also discussed. The review is concluded by looking at different mechanisms in the sensing of polycyclic aromatic hydrocarbons and nitro-aromatic compounds.

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“…-сенсори тринітротолуолу, здатні ідентифікувати його у концентрації до 0,001 М [30]; -подвійні люмінесцентні сенсори температури та тиску [31]; -сенсор аскорбінової кислоти [32]; -фотолюмінесцентний сенсор вільних іонів Pb 2+ , чутливий до концентрації іонів 0,1•10 -6 M [33].…”

Section: інжекція йонів у висококиплячий розчинникunclassified

Synthesis and optical properties of AgInS2 nanoparticles

Gelchuk

Boreiko²,

Okrepka

et al. 2019

Chernivtsi University Scientific Herald. Chemistry

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Ternary chalcogenide Ag-In quantum dots (QDs) are more environmentally friendly than known Cd-, Pb- and P-containing nanoparticles. Here we review the literature on colloidal synthesis methods, properties, and promising fields for the application of AgInS2 quantum dots. Similar to the QDs of lead and cadmium chalcogenides, the most accurate control over the structure and morphology of AgInS2 QDs is achieved by using the method of introducing precursors into high-boiling organic solvents. However, to realize the potential applications of ternary quantum dots, in particular as luminescent biomarkers, the quantum dots must be soluble in polar solvents, especially water. The transfer of quantum dots into aqueous solutions is usually accomplished by exchanging primary lyophilic ligands with smaller bifunctional molecules, such as thioglycolic (or mercaptopropionic) acids, which can passivate the surface of the quantum dots while making them soluble in the polar environment. Methods of colloidal synthesis of AgInS2 / ZnS quantum dots can be classified into the following types: Injection of ions into a high-boiling solvent Synthesis in a mixture of solvents Synthesis in the aquatic environment Methods for the synthesis of AgInS2 QDs in both aqueous solution and organic solvent medium are described. Examples of application of quantum dots for biomedical purposes and in photovoltaic and sensory devices are given. Quantum dots have high photostability and brightness, are characterized by a wide range of absorption and narrow spectral bands of radiation, ie meet most of the criteria for fluorescent materials and biosensors for imaging cancer cells in antitumor therapy, immunofluorescent labeling of proteins, detection of toxins s, visualize intracellular structures, etc. Quantum dots of tertiary chalcogenides, in particular CuInS2 and AgInS2, may be an alternative to quantum dots of binary lead and cadmium chalcogenides for use in light-emitting and light-absorbing systems, such as LEDs, sensors and solar absorbers.

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Detection of ascorbic acid using green synthesized AgInS2 quantum dots

Cited by 49 publications

References 14 publications

Ternary Quantum Dots in Chemical Analysis. Synthesis and Detection Mechanisms

Ternary Quantum Dots in Chemical Analysis. Synthesis and Detection Mechanisms

Synthetic Approaches, Modification Strategies and the Application of Quantum Dots in the Sensing of Priority Pollutants

Synthesis and optical properties of AgInS2 nanoparticles

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