Investigation of Structural, Optical and Antibacterial Activity of ZnS Nanoparticles

Pr‐doped ZnS nanoparticles were synthesised using a low‐cost microwave assisted technique and investigations on their structure, morphology, optical properties, Raman resonance, dielectric properties and luminescence were conducted. Broad XRD peaks suggested the formation of low‐dimensional Pr‐doped ZnS nanoparticles with a cubic structure which was validated by TEM/HRTEM analysis. The energy gaps were identified using diffuse reflectance spectroscopy and it was found that the values varied between 3.54 and 3.61 for different samples. Vibrational experiments on Pr doped ZnS nanoparticles revealed significant Raman modes at ~ 270 and ~350 cm ‐1 associated to TO and LO modes that are shifted to lower wavenumbers, indicating phonon confinement in the synthesised products. The PL spectra of all samples demonstrate that the pure and Pr doped ZnS nanoparticles are three level laser active materials. EDX and mapping study confirms the homogeneous presence of Pr in ZnS. TEM study shows that the particles are of very small size and cubic phase. The samples have high dielectric constant values between 13 and 24 and low loss values, according to the dielectric analysis. With an increase in frequency and a change in the Pr content of ZnS, an intense peak can be seen in the PL spectra at a wavelength of 360 nm, and some other peaks observed correspond to the transition of Pr 3+. The produced NPs are appropriate for optoelectronic applications due to their short dimension, high energy gap, high dielectric constant and low loss values.

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“…The Kubelka–Munk relationship was utilized to evaluate the absorption coefficient. The F(R) (Kubelka–Munk function) is: [43]

normalF ((), R) goodbreak= α goodbreak= \frac{{((), 1 goodbreak- R)}^{2}}{R}

where ‘α’ is the absorption coefficient and ‘R’ is the reflectance. The optical bandgap can be evaluated using Tauc's equation in the form:

αhν goodbreak= normalL {(hν - {normalE}_{normalg})}^{s}

where hν is the incident photon energy, and L is a constant [2].…”

Section: Resultsmentioning

confidence: 99%

Microwave‐assisted synthesis of praseodymium (Pr)‐doped ZnS QDs such as nanoparticles for optoelectronic applications

et al. 2023

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“…The electrostatic attraction between ZnS nanoparticles and bacterial cells resulted in an antibacterial activity which reduced the cell viability. [ 20 ]…”

Section: Resultsmentioning

confidence: 99%

“…The electrostatic attraction between ZnS nanoparticles and bacterial cells resulted in an antibacterial activity which reduced the cell viability. [20] In particular, the addition of functionalized CNCs into PLA notably decreased the cell viability by 81% and 65% in high concentrations of ZnS (3 wt% and 5 wt%), respectively. The relatively high antibacterial property of ZnS-coated CNC nanoparticles could be attributed to their small size which facilitates the penetration into bacterial cells.…”

Section: Antimicrobial Propertiesmentioning

confidence: 96%

Hybrid nanocomposite packaging films from cellulose nanocrystals, zinc sulfide quantum dots reinforced polylactic acid with fluorescent and antibacterial properties

Shojaeiarani

Shirzadifar

Shine

et al. 2022

Polymer Engineering & Sci

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In this study, nanocomposite thin films from cellulose nanocrystals (CNCs), zinc sulfide (ZnS) quantum dots, and polylactic acid (PLA) with fluorescent and antibacterial properties were constructed via a simple, and fast route. ZnS nanoparticles were added to CNC following the hydrothermal process. The film casting method was used to form thin nanocomposite films. The transmission electron microscope analysis revealed the uniform dispersion and ZnS nanoparticles through CNC suspension and FTIR results confirmed the interaction between –OH group on CNC and ZnS nanoparticles. A noticeable emission peak at 475 nm for CNC‐ZnS signifies the suitability of CNC‐ZnS for the assembly of ZnS QDs. The addition of ZnS‐coated CNC into PLA film resulted in a bright blue fluorescence when exposed to ultraviolet light. The incorporation of 5 wt% CNCs loaded with ZnS quantum dots into PLA notably decreased bacterial growth in Escherichia coli and Salmonella, respectively. Data obtained from dynamic mechanical analysis underlined that the presence of 1 wt% ZnS‐coated CNC in PLA increased the storage modulus of nanocomposite films by 25%. The CNCs loaded with ZnS quantum dots showed effective fluorescent and antimicrobial properties to be used as food packaging material.

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“…The antibacterial activity of some other ZnS NPs reported in literatures are given in Table 4 for comparison [9,15,[50][51][52]. The ZOI as well as the test method and sample concentration were tabulated as well.…”

Section: Sem Analysismentioning

confidence: 99%

Garlic Extract-Mediated Synthesis of ZnS Nanoparticles: Structural, Optical, Antibacterial, and Hemolysis Studies

Alnehia

Al-Odayni

Al-Hammadi

et al. 2023

Journal of Nanomaterials

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The green synthesis of zinc sulfide nanoparticles (ZnS NPs)-mediated plant extract is gaining importance because of its simplicity, cost-effectiveness, and ecofriendly nature. In this work, ZnS NPs were synthesized using garlic extract as NPs facilitating agent, characterized by Fourier transform infrared, X-ray diffraction, scanning electron microscope, and UV–visible, then their antibacterial and hemocompatibility were assayed. Analysis revealed a cubic phase, 2.33 nm crystallite size, and a 3.75 eV optical bandgap. Bioactivity test against Staphylococcus aureus and Escherichia coli indicated dose-dependent potency closer to that of azithromycin standard drug and more efficient on S. aureus (Gram-positive) than E. coli (Gram-negative) bacteria. Biocompatibility test in terms of erythrocyte hemolysis, in reference to normal saline and water as minimal and maximal controls, confirmed nontoxic substance up to 100 μg/mL as the highest examined concentration and at which a lysis of 2.9% was detected. Therefore, it could be concluded that this biogenic method is effective in producing ZnS NPs with desirable properties for potential biomedical applications.

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Investigation of Structural, Optical and Antibacterial Activity of ZnS Nanoparticles

Cited by 29 publications

References 47 publications

Microwave‐assisted synthesis of praseodymium (Pr)‐doped ZnS QDs such as nanoparticles for optoelectronic applications

Microwave‐assisted synthesis of praseodymium (Pr)‐doped ZnS QDs such as nanoparticles for optoelectronic applications

Hybrid nanocomposite packaging films from cellulose nanocrystals, zinc sulfide quantum dots reinforced polylactic acid with fluorescent and antibacterial properties

Garlic Extract-Mediated Synthesis of ZnS Nanoparticles: Structural, Optical, Antibacterial, and Hemolysis Studies

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