Ultra-trace level chemosensing of uranyl ions; scuffle between electron and energy transfer from perovskite quantum dots to adsorbed uranyl ions

Halali, Vishaka V.; Rani, Richa; Balakrishna, R. Geetha; Budagumpi, Srinivasa

doi:10.1016/j.microc.2020.104808

Cited by 23 publications

(15 citation statements)

References 46 publications

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“…[98] Concentration of uranyl ions in drinking water must be below 30 ppb according to WHO standards. [98] Halali et al [68] could detect uranyl ion using CsPbBr3 QDs in toluene. The fluorescent intensity of CsPbBr3 QDs was quenched by uranyl ions in the range of 0-3.3 µm via Förster resonance energy transfer and electron transfer.…”

Section: Metal Ion Sensingmentioning

confidence: 99%

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It is an All‐Rounder! On the Development of Metal Halide Perovskite‐Based Fluorescent Sensors and Radiation Detectors

Aamir

Shahiduzzaman

Taima

et al. 2021

Advanced Optical Materials

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Section: Metal Ion Sensingmentioning

confidence: 99%

“…CsPbBr 3 QDs for the uranyl ion sensing was studied among Ni 2+ , Cd 2+ , Zn 2+ , Cr 3+ , Fe 3+ , Ca 2+ , Cu 2+ , and UO 2 2+ ions. [68]…”

Section: Wwwadvopticalmatdementioning

confidence: 99%

It is an All‐Rounder! On the Development of Metal Halide Perovskite‐Based Fluorescent Sensors and Radiation Detectors

Aamir

Shahiduzzaman

Taima

et al. 2021

Advanced Optical Materials

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“…Thus, stability is the predominant challenge of PNCs in chem/bio sensing applications. Fortunately, in recent years, researchers have developed a series of strategies to overcome such drawbacks of PNCs and applied them in the sensing of a range of target molecules, including gases [ 24 , 25 ], metal ions [ 26 , 27 , 28 ], and biomolecules [ 29 , 30 , 31 ], etc. In this review, we provide readers with the current progress of PNCs in chem/bio sensing, mainly about their applications as sensing probes in various scenarios and the detailed techniques to improve their stability and bio-compatibility.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress of Perovskite Nanocrystals in Chem/Bio Sensing

Jia

et al. 2022

Biosensors

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Perovskite nanocrystals (PNCs) are endowed with extraordinary photophysical properties such as wide absorption spectra, high quantum yield, and narrow emission bands. However, the inherent shortcomings, especially the instability in polar solvents and water incompatibility, have hindered their application as probes in chem/bio sensing. In this review, we give a fundamental understanding of the challenges when using PNCs for chem/bio sensing and summarize recent progress in this area, including the application of PNCs in various sensors and the corresponding strategies to maintain their structural integrity. Finally, we provide perspectives to promote the future development of PNCs for chem/bio sensing applications.

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“…Conventional quantum dots such as CdS, CdSe, CdTe, colloidal quantum dot (CQD), and PbS , exhibit intense photoluminescence when their size is comparable to the Bohr excitonic diameter (quantum confinement). However, their strong quantum confinement adversely increases their transition probability, enhances spectral broadening, and also adds to the high density of trap states (due to their large surface-to-volume ratio) .…”

Section: Introductionmentioning

confidence: 99%

Aqueous, Non-Polymer-Based Perovskite Quantum Dots for Bioimaging: Conserving Fluorescence and Long-Term Stability via Simple and Robust Synthesis

Sanjayan

Shivanna

Schiffman

et al. 2022

ACS Appl. Mater. Interfaces

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Perovskite quantum dots (PQDs) offer high photoluminescence quantum yields; however, due to their limited stability in aqueous media, to date their utilization in biomedical applications has been limited. The present work demonstrates highly fluorescent and stable aqueous PQDs that were synthesized using a facile engineered phase transfer method. Ligands were engineered to have a dual functionality, i.e., they could simultaneously mediate the strong binding of PQDs and the interactions with water molecules. The resultant water-soluble PQDs demonstrated robust structural and optical properties. The extracted aqueous PQDs remained stable in pellet form for 8 months, which was the entire test duration. Notably, 100% of their fluorescence was also retained. As a proof-of-concept experiment, the water-soluble PQDs were successfully tagged to polyclonal antibodies and used to image Escherichia coli cells in aqueous media. No structural or optical disturbance in PQDs was detected throughout the process. This work marks the beginning of the use of nonpolymeric aqueous PQDs and shows their strong potential to be used in biological applications.

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Ultra-trace level chemosensing of uranyl ions; scuffle between electron and energy transfer from perovskite quantum dots to adsorbed uranyl ions

Cited by 23 publications

References 46 publications

It is an All‐Rounder! On the Development of Metal Halide Perovskite‐Based Fluorescent Sensors and Radiation Detectors

It is an All‐Rounder! On the Development of Metal Halide Perovskite‐Based Fluorescent Sensors and Radiation Detectors

Recent Progress of Perovskite Nanocrystals in Chem/Bio Sensing

Aqueous, Non-Polymer-Based Perovskite Quantum Dots for Bioimaging: Conserving Fluorescence and Long-Term Stability via Simple and Robust Synthesis

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