Ecotoxicology impact of silica-coated CdSe/ZnS quantum dots internalized in Chlamydomonas reinhardtii algal cells

ElZorkany, Heba ElSayed; Farghali, Mohamed A.; Hassan, Mohamed A.; El-Sayed, Kh.; Canonico, Myriam; Konert, Grzegorz; Farroh, Khaled Yehia; Elshoky, Hisham A.; Kaňa, Radek

doi:10.1016/j.scitotenv.2019.02.274

Cited by 17 publications

(16 citation statements)

References 40 publications

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“…In particular, the loss of photosynthetic pigments in undeveloped chloroplasts by AgNPs has a decisive effect on the decrease in cell granularity, organizing microscopic and SSC analysis. In addition, immaturity by AgNPs may influence the decrease in cell size, thereby distributing immature cells (e.g., motile zoosporangia or zoospores, and non-motile aplanosporangia or aplanospores) instead of mature vegetative cells [7], along with the disappearance of big C. reinhardtii cells exposed to silica-coated quantum dots (with a decrease in average cell size and increase in cell count) [54]. A significant increase in the lipid contents was observed in the homogeneous AgNP-contaminated soil group (Figure 4A,E).…”

Section: Evaluation Of Different Distributions Of Agnp-contaminated S...mentioning

confidence: 99%

Applicability Evaluation of Soil Algae Pipe Assay in Silver Nanoparticle-Contaminated Soils

Kwak

Nam

2022

Applied Sciences

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Due to pervasive and resilient soil contaminants, heterogeneously contaminated soil poses unpredictable potential threats to ecosystems. In this study, the extension of a previously developed soil algae pipe assay for evaluating heterogeneously contaminated soil under an open system is described. The assay can be used in soil that is heterogeneously contaminated with silver nanoparticles in combination with the examination of morphological changes (e.g., in vivo chlorophyll a, cell granularity, cell size, and mucilaginous sheath) and lipid contents. In addition, we attempted to extend the exposure duration under an open system. We evaluated the applicability of this soil algae pipe assay using green alga Chlamydomonas reinhardtii exposed to heterogeneous and homogeneous polyvinylpyrrolidone capping silver nanoparticles in contaminated soils. The results demonstrated that this method is an applicable bioassay that can be employed to better evaluate soil algal toxicity under an open system, with significant changes in the measured endpoints. The developed assay showed decent predictivity, which can be a useful tool when evaluating heterogeneous soil algae contamination.

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Section: Evaluation Of Different Distributions Of Agnp-contaminated S...mentioning

confidence: 99%

Applicability Evaluation of Soil Algae Pipe Assay in Silver Nanoparticle-Contaminated Soils

Kwak

Nam

2022

Applied Sciences

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“…Single QDs are most commonly silica coated using either the Stöber process or reverse microemulsion [ 13 ]. During the Stöber process, which is a sol-gel process based on physical chemistry, monodispersed spherical silica nanoparticles (NPs) are generated by hydrolysis and are subsequently condensed to alkyl silicates (i.e., tetraethyl orthosilicate (TEOS)) in alcoholic solutions, using ammonia as a catalyst, and QDs are used as seeds for silica growth in an ethanol/water mixture [ 27 ].…”

Section: Silica Coating Of Qdsmentioning

confidence: 99%

“… Quantum dot (QD) classification: ( a ) Single QD coated SiO 2 shell [ 13 ], ( b ) Multiply QD-doped SiO 2 nanoparticle [ 30 ], ( c ) Template-based multi-QDs [ 31 ]. …”

Section: Figurementioning

confidence: 99%

“…Quantum dots offer several advantages over conventional organic fluorescence dyes [ 13 , 14 , 15 ]. For example, QDs have narrow (typically 25–35 nm full width at half maximum [FWHM]) and symmetric emission spectra, which are more suitable for the simultaneous detection of multiple fluorescence spectra [ 16 , 17 ], and QDs also have broad absorption spectra, which can emit all fluorescent colors of various QDs simultaneously, with only a single excitation source.…”

Section: Introductionmentioning

confidence: 99%

“…This phenomenon results in a unique band gap that is dependent on particle size, and thus QDs can be designed to emit specific fluorescence spectra, ranging from ultraviolet (UV) to near-infrared (NIR) wavelengths, by choosing an appropriate size and base material [12]. Quantum dots offer several advantages over conventional organic fluorescence dyes [13][14][15]. For example, QDs have narrow (typically 25-35 nm full width at half maximum [FWHM]) and symmetric emission spectra, which are more suitable for the simultaneous detection of multiple fluorescence spectra [16,17], and QDs also have broad absorption spectra, which can emit all fluorescent colors of various QDs simultaneously, with only a single excitation source.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Application of Silica-Coated Quantum Dots in Biomedicine

Pham

Park

Ham

et al. 2021

IJMS

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Quantum dots (QDs) are semiconductor nanoparticles with outstanding optoelectronic properties. More specifically, QDs are highly bright and exhibit wide absorption spectra, narrow light bands, and excellent photovoltaic stability, which make them useful in bioscience and medicine, particularly for sensing, optical imaging, cell separation, and diagnosis. In general, QDs are stabilized using a hydrophobic ligand during synthesis, and thus their hydrophobic surfaces must undergo hydrophilic modification if the QDs are to be used in bioapplications. Silica-coating is one of the most effective methods for overcoming the disadvantages of QDs, owing to silica’s physicochemical stability, nontoxicity, and excellent bioavailability. This review highlights recent progress in the design, preparation, and application of silica-coated QDs and presents an overview of the major challenges and prospects of their application.

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Luminescence Enhancement, Encapsulation, and Patterning of Quantum Dots Toward Display Applications

Saeed

Zhang

et al. 2021

Adv Funct Materials

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Quantum dots (QDs) are semiconductor nanoparticles (NPs) that have gained significant interest in the academia and industry because of their unique optoelectronic properties such as tunable emission wavelength, high color purity, wide color gamut, and high photoluminescence quantum yield. However, it remains a challenge to fabricate a QD colloid or solution into solid devices featuring the desired patterns and maintaining high efficiency. Recently, researchers have shown significant progress in the efficiency improvement and device fabrication of QD-based displays, contributed by the development of both materials and device engineering. In this review, the recent progress in the engineering of QDs will be discussed, with an emphasis on the encapsulation methods and patterning strategies by which QDs are packaged into solid-state devices with pixelated patterns as well as luminescence enhancement and modulation.

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Ecotoxicology impact of silica-coated CdSe/ZnS quantum dots internalized in Chlamydomonas reinhardtii algal cells

Cited by 17 publications

References 40 publications

Applicability Evaluation of Soil Algae Pipe Assay in Silver Nanoparticle-Contaminated Soils

Applicability Evaluation of Soil Algae Pipe Assay in Silver Nanoparticle-Contaminated Soils

Synthesis and Application of Silica-Coated Quantum Dots in Biomedicine

Luminescence Enhancement, Encapsulation, and Patterning of Quantum Dots Toward Display Applications

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