Quantum dots as nanosensors for detection of toxics: a literature review

Ganesan, Muthupandian; Nagaraaj, P.

doi:10.1039/d0ay01293a

Cited by 42 publications

(12 citation statements)

References 168 publications

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“…Quantum dots are defined as highly luminescent materials up to a few nanometers in size (Kash, 1990). These materials have been used extensively in chemical sensors (Ganesan and Nagaraaj, 2020), due to their high sensitivity to the local environment (Kim et al, 2018) and straightforward modification procedures (Mehta et al, 2019;Li et al, 2015). In one example, carbon quantum dots coated with vitamin B12 exhibited dual fluorescence emission from excitation at 355 nm: emission at 417 nm due to the carbon dots, and emission at 550 nm due to energy transfer from the carbon dots to the vitamin B12 coating (Figure 11) (Campos et al, 2017).…”

Section: Quantum Dotsmentioning

confidence: 99%

Fluorescence-Based Sensing of Pesticides Using Supramolecular Chemistry

Levine

2021

Front. Chem.

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The detection of pesticides in real-world environments is a high priority for a broad range of applications, including in areas of public health, environmental remediation, and agricultural sustainability. While many methods for pesticide detection currently exist, the use of supramolecular fluorescence-based methods has significant practical advantages. Herein, we will review the use of fluorescence-based pesticide detection methods, with a particular focus on supramolecular chemistry-based methods. Illustrative examples that show how such methods have achieved success in real-world environments are also included, as are areas highlighted for future research and development.

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Section: Quantum Dotsmentioning

confidence: 99%

Fluorescence-Based Sensing of Pesticides Using Supramolecular Chemistry

Levine

2021

Front. Chem.

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“…e assay was proved on exosomes isolated from human lung carcinoma cells in a dilution of 6.4 × 10 9 particles/ml. Quantum dots are another material that can serve for the purpose of reaction visualization and macromolecules labeling [56][57][58][59]. An LFT method based on CdTe quantum dots was, for instance, constructed by Lu and coworkers in order to detect Shiga toxin type II [60].…”

Section: Current Trends In Lft Construction In Point-of-care Diagnosismentioning

confidence: 99%

Point-of-Care Diagnoses and Assays Based on Lateral Flow Test

Pohanka

2021

International Journal of Analytical Chemistry

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Analytical devices for point-of-care diagnoses are highly desired and would improve quality of life when first diagnoses are made early and pathologies are recognized soon. Lateral flow tests (LFTs) are such tools that can be easily performed without specific equipment, skills, or experiences. This review is focused on the use of LFT in point-of-care diagnoses. The principle of the assay is explained, and new materials like nanoparticles for labeling, new recognition molecules for interaction with an analyte, and new additional instrumentation like signal scaling by a smartphone camera are described and discussed. Advantages of the LFT devices as well as their limitations are described and discussed here considering actual papers that are properly cited.

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“…As previously mentioned, the development of nanotechnology allowed the design and development of new sensing devices for phenolic species detection [95]. In 2008 Nezhad et al presented an indirect colorimetric method for the optical detection of phenolic compounds exploiting the SPR band shown by gold nanoparticles [96].…”

Section: Nanostructure-based Sensorsmentioning

confidence: 99%

Advanced Optical Sensing of Phenolic Compounds for Environmental Applications

Delfino

Diano

Lepore

2021

Sensors

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Phenolic compounds are particularly dangerous due to their ability to remain in the environment for a long period of time and their toxic effects. They enter in the environment in different ways, such as waste from paper manufacturing, agriculture (pesticides, insecticides, herbicides), pharmaceuticals, the petrochemical industry, and coal processing. Conventional methods for phenolic compounds detection present some disadvantages, such as cumbersome sample preparation, complex and time-consuming procedures, and need of expensive equipment. Therefore, there is a very large interest in developing sensors and new sensing schemes for fast and easy-to-use methods for detecting and monitoring the phenolic compound concentration in the environment, with special attention to water. Good analytical properties, reliability, and adaptability are required for the developed sensors. The present paper aims at revising the most generally used optical methods for designing and fabricating biosensors and sensors for phenolic compounds. Some selected examples of the most interesting applications of these techniques are also proposed.

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Quantum dots as nanosensors for detection of toxics: a literature review

Abstract: Great advances have been made on the sensor based methods for the chemical analysis owing to their high sensitivity, selectivity, less testing time, and minimized usage of chemical reagents. Quantum...

Cited by 42 publications

References 168 publications

Fluorescence-Based Sensing of Pesticides Using Supramolecular Chemistry

Fluorescence-Based Sensing of Pesticides Using Supramolecular Chemistry

Point-of-Care Diagnoses and Assays Based on Lateral Flow Test

Advanced Optical Sensing of Phenolic Compounds for Environmental Applications

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