Synthesis of Eu+3 doped ZnS nanoparticles by a wet chemical route and its characterization

Pal, Mou; Mathews, Nini Rose; Ramírez-Morales, E.; Jimenez, J.; Mathew, Xavier

doi:10.1016/j.optmat.2013.08.003

Cited by 56 publications

(16 citation statements)

References 37 publications

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“…One such type of PL emission has been reported by Gupta et al due to defective levels at about 417, 499 and 480 nm. Similar results were also reported by Mathew et al with PL emission peaks at 417, 438 and 466 nm, respectively. There is more strain on the ZnS host lattice due to the presence of the interstitial sulphur, which is due to the large difference in the ionic radii of sulphur ions (1.7 Å) to that of Zn ions (0.74 Å), as a consequence of these differences electron levels for this site will have small binding energies.…”

Section: Resultssupporting

confidence: 91%

Tuneable luminescence properties of EDTA‐assisted ZnS:Mn nanocrystals from a yellow‐orange to a red emission band

et al. 2017

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Luminescence technology has been improved with the help of semiconductor nanoparticles that possess novel optical and electrical properties compared with their bulk counterpart. The aim of this study was to design semiconductor nanocrystals in their pure (ZnS) or doped form (ZnS:Mn) with different concentrations of Mn ions by a wet chemical route stabilized by ethylenediamine tetra-acetic acid (EDTA) and to evaluate their luminescence properties. The nanocrystals were characterized by physicochemical techniques such as X-ray diffraction (XRD), High-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SEAD), EDS, and ultraviolet (UV)-visible light and photoluminescence (PL) studies. These results showed the presence of cubic phase and spherically shaped nanocrystals. A blue shift with respect to their bulk counterpart was observed. PL emission spectra were observed with a fixed blue peak and the yellow-orange bands were red shifted towards the red region under the same excitation wavelength. The orange-red bands were attributed to the radiation transition of electrons in 3d5 unfilled shells of Mn ions [ T ( G)- A ( S)]; the ZnS matrix varied with Mn concentration. Shift and increase in the intensity of the PL and absorption bands were observed with increase in Mn content. The study showed that Mn -doped ZnS nanocrystal emission bands can be tuned from the yellow-orange to the red regions under a controlled synthesis process and could be used as promising luminescent emitters in the biology field upon functionalization with suitable materials. Further studies on construction with various other materials will be useful for practical applications.

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Section: Resultssupporting

confidence: 91%

Tuneable luminescence properties of EDTA‐assisted ZnS:Mn nanocrystals from a yellow‐orange to a red emission band

et al. 2017

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“…These XRD patterns are well matched with the standard JCPDS data (Card no. 80-0020) [18]. Only diffraction peaks of ZnS are present in the XRD patterns due to the small doping amount of Y 3+ impurity ions.…”

Section: Characterization Techniques X-ray Diffraction (Xrd)mentioning

confidence: 99%

Studies on Characterization, Optical Absorption, and Photoluminescence of Yttrium Doped ZnS Nanoparticles

Viswanath

Naik

Somalanaik

et al. 2014

Journal of Nanotechnology

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Pure ZnS and ZnS:Y nanoparticles were synthesized by a chemical coprecipitation route using EDTA-ethylenediamine as a stabilizing agent. X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectrometry (FTIR), thermogravimetric-differential scanning calorimetry (TG-DSC), and UV-visible and photoluminescence (PL) spectroscopy were employed to characterize the assynthesized ZnS and ZnS:Y nanoparticles, respectively. XRD and TEM studies show the formation of cubic ZnS:Y particles with an average size of ∼4.5 nm. The doping did not alter the phase of the zinc sulphide, as a result the sample showed cubic zincblende structure. The UV-visible spectra of ZnS and ZnS:Y nanoparticles showed a band gap energy value, 3.85 eV and 3.73 eV, which corresponds to a semiconductor material. A luminescence characteristics such as strong and stable visible-light emissions in the orange region alone with the blue emission peaks were observed for doped ZnS nanoparticles at room temperature. The PL intensity of orange emission peak was found to be increased with an increase in yttrium ions concentration by suppressing blue emission peaks. These results strongly propose that yttrium doped zinc sulphide nanoparticles form a new class of luminescent material.

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“…Emission peak at 384 nm of zinc sulfide QDs is due to lattice defect. Also, the emission peak at 715 nm is related to the Eu 3+ ion due to the transition of 5 D 0 to 7 F 4 [35][36][37][38][39]. Fig.…”

Section: Pl and Ftir Analysismentioning

confidence: 99%

Synthesis, feasibility study of production of singlet oxygen and hydroxyl radical and performance in antibacterial activity of ZnS:Eu QDs

Karimi

Sadeghi

Zahedifar

2022

jcc

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Eu doped zinc sulfide quantum dots (QDs) were prepared by the chemical Co-precipitation method. X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and infrared Fourier transform (FT-IR) analysis were used to characterize the quantum dots. The size of nano-crystals was estimated using a Williamson Hall equation.Then, the synthesized nanoparticles were studied to investigate the antibacterial effect, containing different strains of pathogenic bacteria, and the lowest inhibitory concentration and halo diameter were calculated. WilliamsonHall equation of about 6 nm with a strain of 0.7 nm, which is match with the reported size of the SEM image.The photoluminescence spectrum (PL) of ZnS:Eu QD in excitation wavelength of 280 nm shows two emission peaks at 384 and 715 nm. In order to use these QDs as photosensitizer in photodynamic therapy, anthracene and methylene blue chemical detectors were used for detection of singlet oxygen and hydroxyl radical, respectively.The significant point for these quantum dots is that, in addition to production of hydroxyl radical, they also have the ability to produce singlet oxygen with UVC radiation. The antimicrobial effect of ZnS:Eu QDs was also investigated using a disc diffusion method on 11 microbial strains. The results of this test showed that Two microorganisms S.dysenteriae, Serotype that were resistant to the antibiotic nystatin and showed the highest sensitivity to ZnS:Eu QDs.

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Synthesis of Eu+3 doped ZnS nanoparticles by a wet chemical route and its characterization

Cited by 56 publications

References 37 publications

Tuneable luminescence properties of EDTA‐assisted ZnS:Mn nanocrystals from a yellow‐orange to a red emission band

Tuneable luminescence properties of EDTA‐assisted ZnS:Mn nanocrystals from a yellow‐orange to a red emission band

Studies on Characterization, Optical Absorption, and Photoluminescence of Yttrium Doped ZnS Nanoparticles

Synthesis, feasibility study of production of singlet oxygen and hydroxyl radical and performance in antibacterial activity of ZnS:Eu QDs

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