Cu-doped CdS and ZnS nanocrystals grown onto thiolated silica-gel

Andrade, George Ricardo Santana; Nascimento, Cristiane da Cunha; Xavier, Paulo Adriano; Costa, Silvânio Silvério Lopes da; Costa, Luiz Pereira da; Gimenez, Iara F.

doi:10.1016/j.optmat.2014.08.008

Cited by 7 publications

(1 citation statement)

References 17 publications

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“…Great interest has been paid on the semiconductor nanomaterials (NPs) due to their quantum confinement effect, and their electronic and optical properties can be tailored by changing the nanoparticle size. 1,2 Manganese-doped semiconductors such as CdS: Mn, ZnO:Mn and ZnS:Mn, have a lot of interest in research because of these optical, magnetic, electronic and also pharmaceutical properties [3][4][5][6][7][8] . As an important Ⅱ-Ⅵ semiconductor, ZnS nanoparticles are nontoxic compared to other II-IV semiconductors like CdS and it has a bandgap of 3.7 eV 7 , making it to be a very attractive materials on the optical fields, and their optical properties can be tuned by doping them with impurities, which can induce new emitting centers in their quantum confined crystalline structure.…”

Section: Introductionmentioning

confidence: 99%

Fate of ZnS:Mn quantum dots in Seine River water and seawater. Ecotoxicological effects on Chlorella Vulgaris microalgae

Deng

Maaloul

Nowak

et al. 2023

Preprint

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With the wide use of nanomaterials in our daily life, the potential ecotoxicology effect of nanoparticles (NPs) has attracted more and more attention from researchers. Here, the ZnS:Mn (0.5%, 2.0%, 4.0% and 10% of Mn, in mol) QDs were synthesized using the polyol method, and the toxicity mechanism was investigated by contacting the microalgae Chlorella vulgaris with ZnS:Mn QDs in different culture media (BG11, Seine River water - SRW, synthetic seawater - SSW). The crystalline size of the synthesized QDs was around 1.5 nm, but the particles tended to aggregate since the size of the ZnS:Mn colloids determined by DLS ranged from 300 nm to 700 nm at pH 6 and 8. From a toxicological point of view, all these ZnS:Mn QDs caused a decrease in the photosynthetic activity, cell viability, and intracellular ATP level; moreover, the SOD activity significantly increased in SSW, which evidenced that the ZnS:Mn NPs would expose the algae cell in the oxidative stress environment. Finally, TEM observations of the algae thin sections confirmed the internalization of the ZnS:Mn NPs, which caused the leakage of the cytoplasm.

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Section: Introductionmentioning

confidence: 99%

Fate of ZnS:Mn quantum dots in Seine River water and seawater. Ecotoxicological effects on Chlorella Vulgaris microalgae

Deng

Maaloul

Nowak

et al. 2023

Preprint

View full text Add to dashboard Cite

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Synthesis and Characterizations of ZnS:Cu/ZnS Assisted by 3-Mercaptopropionic Acid

Labiadh¹,

Louiz²,

Schneider³

et al. 2018

Chemistry Africa

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3-Mercaptopropionic acid capped core/shell ZnS:Cu(3%)/ZnS doped quantum dots (QDs) where synthesized at 95 °C in basic aqueous solution using the nucleation doping approach methods. The structural and optical properties of the QDs were characterized by X-ray diffraction (XRD) which confirms the cubic phase blende, whereas transmission electron microscopy (TEM) which shows the nanoparticles are spherical. UV-vis spectroscopy and photoluminescence (PL) spectroscopy. The obtained nearly monodisperse QDs have an average diameter of ca. 3.31 nm and a zinc blende crystal structure. The PL emission wavelength was limited between 500 and 510 nm but PL quantum efficiency of ZnS:Cu/ZnS core/shell nanocrystals increased up to 5%. The experimental results demonstrate that this method is effective for the preparation of ZnS:Cu/ZnS quantum dots.

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Easy preparation of gold nanostructures supported on a thiolated silica-gel for catalysis and latent fingerprint detection

et al. 2018

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Cu-doped CdS and ZnS nanocrystals grown onto thiolated silica-gel

Cited by 7 publications

References 17 publications

Fate of ZnS:Mn quantum dots in Seine River water and seawater. Ecotoxicological effects on Chlorella Vulgaris microalgae

Fate of ZnS:Mn quantum dots in Seine River water and seawater. Ecotoxicological effects on Chlorella Vulgaris microalgae

Synthesis and Characterizations of ZnS:Cu/ZnS Assisted by 3-Mercaptopropionic Acid

Easy preparation of gold nanostructures supported on a thiolated silica-gel for catalysis and latent fingerprint detection

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