Low temperature chemical synthesis of ZnS, Mn doped ZnS nanosized particles: Their structural, morphological and photophysical properties

Barman, B.; Sarma, Kamal

doi:10.1016/j.solidstatesciences.2020.106404

Cited by 16 publications

(9 citation statements)

References 36 publications

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“…Similarly, the HRTEM micrograph for Mn:ZnS exhibit spherical NPs with average particle size of 1.83 nm, as shown in ( c ). The reduction in particle size is in agreement with the results acquired from structural analysis [ 42 ]. The particle size distributions for ZnS ( b ) and Mn:ZnS ( d ) were evaluated using ImageJ software and plotted using Origin 8 software.…”

Section: Resultssupporting

confidence: 88%

“…The observed patterns can be correlated to the reflection planes of (111), (220), and (311) for ZnS and Mn:ZnS QDs in the matrix; the hkl diffraction plane suggests cubic zinc blende phase in accordance with Joint Committee on Powder Diffraction Standard (JCPDS Card No.000-01-0792) [31]. The hkl diffraction planes exhibit space group of F-43m with the space group number 216 matching with the ZnS nanoctructure, as reported in the literature [31,42]. Further, the observation of diffraction reflections for the pure CS NPs (Figure 5a), CS-Mn:ZnS (Figure 5d), and MMC@CS-Mn:ZnS (Figure 5e) without any impurity peak suggest the purity of polymeric nanostructure and accuracy of the product [47].…”

Section: Xrd Analysissupporting

confidence: 79%

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Drug Release Profiles of Mitomycin C Encapsulated Quantum Dots–Chitosan Nanocarrier System for the Possible Treatment of Non-Muscle Invasive Bladder Cancer

et al. 2021

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Nanotechnology-based drug delivery systems are an emerging technology for the targeted delivery of chemotherapeutic agents in cancer therapy with low/no toxicity to the non-cancer cells. With that view, the present work reports the synthesis, characterization, and testing of Mn:ZnS quantum dots (QDs) conjugated chitosan (CS)-based nanocarrier system encapsulated with Mitomycin C (MMC) drug. This fabricated nanocarrier, MMC@CS-Mn:ZnS, has been tested thoroughly for the drug loading capacity, drug encapsulation efficiency, and release properties at a fixed wavelength (358 nm) using a UV–Vis spectrophotometer. Followed by the physicochemical characterization, the cumulative drug release profiling data of MMC@CS-Mn:ZnS nanocarrier (at pH of 6.5, 6.8, 7.2, and 7.5) were investigated to have the highest release of 56.48% at pH 6.8, followed by 50.22%, 30.88%, and 10.75% at pH 7.2, 6.5, and 7.5, respectively. Additionally, the drug release studies were fitted to five different pharmacokinetic models including pesudo-first-order, pseudo-second-order, Higuchi, Hixson–Crowell, and Korsmeyers–Peppas models. From the analysis, the cumulative MMC release suits the Higuchi model well, revealing the diffusion-controlled mechanism involving the correlation of cumulative drug release proportional to the function square root of time at equilibrium, with the correlation coefficient values (R2) of 0.9849, 0.9604, 0.9783, and 0.7989 for drug release at pH 6.5, 6.8, 7.2, and 7.5, respectively. Based on the overall results analysis, the formulated nanocarrier system of MMC synergistically envisages the efficient delivery of chemotherapeutic agents to the target cancerous sites, able to sustain it for a longer time, etc. Consequently, the developed nanocarrier system has the capacity to improve the drug loading efficacy in combating the reoccurrence and progression of cancer in non-muscle invasive bladder diseases.

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Section: Resultssupporting

confidence: 88%

Section: Xrd Analysissupporting

confidence: 79%

Drug Release Profiles of Mitomycin C Encapsulated Quantum Dots–Chitosan Nanocarrier System for the Possible Treatment of Non-Muscle Invasive Bladder Cancer

et al. 2021

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“…There is also significant disagreement between reports describing the size dependence of the absorption spectrum of ZnS. ,, The inconsistencies are likely the result of error in common sizing methods, including electron microscopy (EM), leading to a range in nanocrystal sizes reported for the same energy of transition (Figure S32 and Tables S3–S5). − ,,− ,,− Compared to CdE and PbE materials, ZnS has a lower Z-contrast, making EM techniques challenging, especially for the smallest nanocrystals. Scherrer analysis of powder X-ray diffraction (pXRD) is also limited at very small sizes, especially when stacking faults and inhomogeneous strain contribute to peak broadening. , Mass spectrometry has been used to probe ZnS QD ensembles; , however, zinc isotope patterns, broad distributions that depend on ligands and their coverage, as well as the formation of multiply charged species and fragmentation complicate the interpretation of this data.…”

Section: Introductionmentioning

confidence: 99%

Size Dependent Optical Properties and Structure of ZnS Nanocrystals Prepared from a Library of Thioureas

et al. 2022

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ZnS nanocrystals (λ max (1S e −1S 3/2h ) = 260−320 nm, d = 1.7−10.0 nm) are synthesized from Zn(O 2 CR) 2 (O 2 CR = tetradecanoate, oleate and 2-hexyldecanoate), N,N′-disubstituted and N,N′,N′-trisubstituted thioureas, and P,P,N-trisubstituted phosphanecarbothioamides. The influence of precursor substitution, ligand sterics, and reaction temperature on the final nanocrystal size was evaluated. Using saturated hydrocarbon solvents and saturated aliphatic carboxylate ligands, polymeric byproducts could be avoided and pure ZnS nanocrystals isolated. Elevated temperatures, slower precursor conversion reactivity, and branched zinc 2-hexyldecanoate yield the largest ZnS nanocrystals. Carefully purified zinc carboxylate, rapidly converting precursors, and cooling the synthesis mixture following complete precursor conversion provide quasispherical nanocrystals with the narrowest shape dispersity. Nanocrystal sizes were measured using pair distribution function (PDF) analysis of X-ray scattering and scanning transmission electron microscopy (STEM) and plotted versus the energy of their first excitonic optical absorption. The resulting empirical relationship provides a useful method to characterize the nanocrystal size from 1.7 to 4.0 nm using optical absorption spectroscopy.

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“…Zinc-based nanostructures have been of interest due to their low toxicity, eco-friendly nature, biocompatibility as well as and the possibility of using them in various forms, such as nanoparticles, nanowires, nanotubes, nanowells, etc. [1]. Among them, zinc sulfide (ZnS) is an important binary II-VI semiconductor compound with a direct wide band gap energy of 3.6-3.7 eV at room temperature [2,3,4,5] and a high refractive index, as well as a high transmittance in the visible region [6].…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted synthesis and characterization of undoped and manganese doped zinc sulfide nanoparticles

Kuzmin

Dile

Laganovska

et al. 2022

Materials Chemistry and Physics

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Low temperature chemical synthesis of ZnS, Mn doped ZnS nanosized particles: Their structural, morphological and photophysical properties

Cited by 16 publications

References 36 publications

Drug Release Profiles of Mitomycin C Encapsulated Quantum Dots–Chitosan Nanocarrier System for the Possible Treatment of Non-Muscle Invasive Bladder Cancer

Drug Release Profiles of Mitomycin C Encapsulated Quantum Dots–Chitosan Nanocarrier System for the Possible Treatment of Non-Muscle Invasive Bladder Cancer

Size Dependent Optical Properties and Structure of ZnS Nanocrystals Prepared from a Library of Thioureas

Microwave-assisted synthesis and characterization of undoped and manganese doped zinc sulfide nanoparticles

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