Synthesis of CuInS2 and CuInS2@ZnX (X = S, Se) nanoparticles for bioimaging of cancer cells using electrochemically generated S2- and Se2-

Silva, Richardson R.; Freitas, Denilson V.; Sousa, Felipe L.N.; Jesus, Anderson C.; Silva, Stterferson E.; Mansur, Alexandra A.P.; Carvalho, Sandhra M.; Marques, Dayane S.; Azevêdo, W.M. de; Navarro, Marcelo

doi:10.1016/j.jallcom.2020.156926

Cited by 27 publications

(4 citation statements)

References 66 publications

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“…At the same time, the boiling point of water limits the preparation of QDs with good performance at high temperature (such as QDs with Ga 3+ ). 31 Notably, the chemical activities among different ions (normally Ga 3+ , Ag + , Zn 2+ , In 3+ , S 2− ) are unmatched, accompanied by the shortcomings of ternary QDs in adjusting composition, spectra, and efficiency; here the quaternary/ quinary QDs and derivatives will be focused more on.…”

Section: ■ Synthesis and Optical Propertiesmentioning

confidence: 99%

“…The chemical composition of I–III–VI QDs and derivatives exhibit considerable flexibility and substitutability, which own the merits of full coverage of visible light and finely customized electronic band structure. The larger ions of III (In 3+ ) and VI (S 2– , Se 2– ) can reduce the band gap by tuning the electron band structure and keep the emission of QDs in the red and infrared ranges, which is advantageous for red LEDs, solar cells, photocatalysis, and bioimaging. ,− For green and blue QDs, smaller ions (Ga 3+ , Al 3+ , Bi 3+ and Zn 2+ , etc.) are necessary, especially Ga 3+ and Al 3+ , which can tune the spectra of QDs to the green and blue ranges with narrower full-width at half maximum (FWHM), , which expand the applications of LEDs.…”

Section: Electronic Structure Characteristicsmentioning

confidence: 99%

“…As for the aqueous-phase method, whose good biocompatibility is more suitable for the application of biological imaging (near-infrared). At the same time, the boiling point of water limits the preparation of QDs with good performance at high temperature (such as QDs with Ga 3+ ) …”

Section: Synthesis and Optical Propertiesmentioning

confidence: 99%

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I–III–VI Quantum Dots and Derivatives: Design, Synthesis, and Properties for Light-Emitting Diodes

et al. 2023

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Quantum dots (QDs) are important frontier luminescent materials for future technology in flexible ultrahigh-definition display, optical information internet, and bioimaging due to their outstanding luminescence efficiency and high color purity. I− III−VI QDs and derivatives demonstrate characteristics of composition-dependent band gap, full visible light coverage, high efficiency, excellent stability, and nontoxicity, and hence are expected to be ideal candidates for environmentally friendly materials replacing traditional Cd and Pb-based QDs. In particular, their compositional flexibility is highly conducive to precise control energy band structure and microstructure. Furthermore, the quantum dot light-emitting diodes (QLEDs) exhibits superior prospects in monochrome display and white illumination. This review summarizes the recent progress of I−III−VI QDs and their application in LEDs. First, the luminescence mechanism is illustrated based on their electronic-band structural characteristics. Second, focusing on the latest progress of I−III−VI QDs, the preparation mechanism, and the regulation of photophysical properties, the corresponding application progress particularly in light-emitting diodes is summarized as well. Finally, we provide perspectives on the overall current status and challenges propose performance improvement strategies in promoting the evolution of QDs and QLEDs, indicating the future directions in this field.

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Section: ■ Synthesis and Optical Propertiesmentioning

confidence: 99%

Section: Electronic Structure Characteristicsmentioning

confidence: 99%

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I–III–VI Quantum Dots and Derivatives: Design, Synthesis, and Properties for Light-Emitting Diodes

et al. 2023

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“…Core/shell CIS/ZnS QDs exhibiting up to 97% FLQY have been reported . They are attractive for various applications such as white light-emitting diodes (LEDs), solar cells, and bioimaging due to their low toxicity and excellent visible FL properties. − …”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Electrophoretic Deposition of Fluorescent Nanocomposite Films in an Aqueous Dispersion of Hydrophilized Core/Shell CuInS₂/ZnS Quantum Dots for Optoelectronic Applications

Morimoto,

Iso,

Isobe

2024

ACS Appl. Mater. Interfaces

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Low-toxic and efficient fluorescent core−shell CuInS 2 / ZnS (CIS/ZnS) quantum dots (QDs) are good candidates for optoelectronic device applications. They are synthesized in a hydrophobic environment, while large amounts of organic solvents used in the preparation of fluorescent films have significant problems on environmental load and human health. CIS/ZnS QDs hydrophilized by adsorbing 3-mercaptopropionic acid on their surfaces can be used in the aqueous film fabrication process. In this work, the aqueous electrophoretic deposition (EPD) of the hydrophilized QDs with silicone-modified acrylic resin nanoparticles was performed to fabricate fluorescent nanocomposite films. The hydrophilized QDs and resin nanoparticles were simultaneously dispersed in basic aqueous solutions due to electrostatic repulsion resulting from their negatively charged surfaces. Transparent films were obtained on a transparent conductive substrate at the anode side by the EPD. They showed yellow fluorescence of the QDs. The thickness increased with increasing the deposition time; however, hemispherical holes attributed to oxygen gas generated by water electrolysis were observed at the longer time. The electron microscopy revealed that the films were densely and homogeneously deposited. The QDs were dispersed around the resin nanoparticles without aggregation. The fluorescence (FL) quantum yield was 43%. The optical absorption peak and FL intensity of the QDs increased accompanied by the film growth. The nanocomposite film showed good heat resistance at 80−120 °C for 5 h; therefore, the prepared films have feasibility in white light-emitting diode (LED) applications. A lightening device structured with the obtained EPD film placed on a blue LED successfully emitted white light. In addition, the flexibility of the nanocomposite film was demonstrated. The aqueous EPD method would be one of the suitable methods for the industrial production of fluorescent QD films. This technique can be applied to other hydrophilic fluorescent QDs with charged surfaces. Realization of various fluorescent QD films would expand the application possibilities.

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Tailoring Photoluminescence Properties of Ternary Zn‐doped Cu─In─Se Quantum Dots via Surfactant Tuning

Sheng,

Xu,

Zhang

et al. 2024

ChemistrySelect

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The shape and size‐controlled synthesis of colloidal I−III−VI quantum dots (QDs) can be attained only by a few synthesis strategies via the introduction of various high‐boiling‐point organic surfactants. To further investigate this strategy, in this study, we present a surfactant‐associated controlled synthesis of copper (Cu)‐deficient, zinc (Zn)‐doped Cu─indium (In)─selenium (Se) QDs, followed by a mechanistic investigation of their photophysical properties using surfactants, such as oleylamine (OLA), oleic acid (OA), and diphenylphosphine (DPP). OLA significantly promoted the quantum size effect‐resultant emission wavelength red‐shift, while OA controlled the homogeneous growth of QDs and improved the quantum yields. Moreover, Gaussian deconvolution of the photoluminescence spectra and the bandgap derived from the absorption spectra, by fitting, supported the fact that the radiative transition channels, especially for surface‐trap‐state‐related transitions, are also dependent on the surfactants. Specifically, the conduction band electron‐intragap state transitions and donor‐acceptor transitions were present in all the prepared samples but accounted for different percentages. Furthermore, the surface‐trap‐state‐related transitions significantly faded upon adding (i) OLA/OA as the sole surfactant to the cationic precursor and (ii) the OA + OLA + DPP mixture to the anionic precursor. The findings described here are expected to provide a general strategy for enhancing the tunability of photophysical properties in other QDs systems.

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Synthesis of CuInS2 and CuInS2@ZnX (X = S, Se) nanoparticles for bioimaging of cancer cells using electrochemically generated S2- and Se2-

Cited by 27 publications

References 66 publications

I–III–VI Quantum Dots and Derivatives: Design, Synthesis, and Properties for Light-Emitting Diodes

I–III–VI Quantum Dots and Derivatives: Design, Synthesis, and Properties for Light-Emitting Diodes

Eco-Friendly Electrophoretic Deposition of Fluorescent Nanocomposite Films in an Aqueous Dispersion of Hydrophilized Core/Shell CuInS₂/ZnS Quantum Dots for Optoelectronic Applications

Tailoring Photoluminescence Properties of Ternary Zn‐doped Cu─In─Se Quantum Dots via Surfactant Tuning

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Synthesis of CuInS2 and CuInS2@ZnX (X = S, Se) nanoparticles for bioimaging of cancer cells using electrochemically generated S2- and Se2-

Cited by 27 publications

References 66 publications

I–III–VI Quantum Dots and Derivatives: Design, Synthesis, and Properties for Light-Emitting Diodes

I–III–VI Quantum Dots and Derivatives: Design, Synthesis, and Properties for Light-Emitting Diodes

Eco-Friendly Electrophoretic Deposition of Fluorescent Nanocomposite Films in an Aqueous Dispersion of Hydrophilized Core/Shell CuInS2/ZnS Quantum Dots for Optoelectronic Applications

Tailoring Photoluminescence Properties of Ternary Zn‐doped Cu─In─Se Quantum Dots via Surfactant Tuning

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Eco-Friendly Electrophoretic Deposition of Fluorescent Nanocomposite Films in an Aqueous Dispersion of Hydrophilized Core/Shell CuInS₂/ZnS Quantum Dots for Optoelectronic Applications