Micro-nanostructural and composition characterization of ZnO: Al doped films by SEM-EDX and HRTEM-EDX

Vasile, Eugeniu; Plugaru, R.; Mihaiu, Susana; Toader, Ana Maria

doi:10.1109/smicnd.2011.6095789

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…Thus, a decrease in the Zn content (atomic and weight percentage) was observed in the EDS spectrum when compared with pure ZnO. In the case of oxygen EDS analysis, though the results coincide with the theoretically reported data for ZnO, [66] quantification of oxygen through EDS is difficult because of the presence of oxygen in the interstitial spaces between nanoparticles. [67] Although the dopant content can vary in the EDS measurements because of the average of individual measurements, [68] the doping concentration of the metals was around 1.0 % w/w and agreed with the theoretical content (1.0 %).…”

Section: Tem-eds Analysis Of Undoped and Doped Zno Npssupporting

confidence: 76%

Synergistic Antibacterial Activity of Nanohybrid Materials ZnO–Ag and ZnO–Au: Synthesis, Characterization, and Comparative Analysis of Undoped and Doped ZnO Nanoparticles

Berenice

Thangarasu

2015

Aust. J. Chem.

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ZnO nanoparticles (NPs) were prepared using the hydrothermal method, and then doped with Ag or Au NPs, yielding ZnO NPs, ZnO-Ag NPs, and ZnO-Au NPs, which were characterized by transmission electron microscopy, X-ray diffraction, and energy-dispersive X-ray spectroscopy. The synthesized nanomaterials were analyzed for their antibacterial properties against bacterial strains (Staphylococcus aureus, Bacillus cereus, Escherichia coli, and Salmonella typhi) by qualitative and quantitative assays. Minimal inhibitory concentration (MIC) results show that growth control is more effective for Gram-positive bacteria than for Gram-negative bacteria. Although ZnO NPs and Ag NPs are antibacterial agents, the lowest bacterial growth was observed for ZnO-Ag NPs, showing that the doped Ag NPs greatly facilitate the interaction between the microbial cells and the NP surface. Though the same antibacterial effect was expected for ZnO-Au NPs, the inhibition activity was very close to that of ZnO NPs. The order of bacterial cell growth inhibition was ZnO-Ag NPs .. ZnO-Au NPs , ZnO NPs .. ZnO powder. We also analyzed the morphology of bacterial cells treated with NPs by scanning electron microscopy.

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Section: Tem-eds Analysis Of Undoped and Doped Zno Npssupporting

confidence: 76%

Synergistic Antibacterial Activity of Nanohybrid Materials ZnO–Ag and ZnO–Au: Synthesis, Characterization, and Comparative Analysis of Undoped and Doped ZnO Nanoparticles

Berenice

Thangarasu

2015

Aust. J. Chem.

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“…The EDX spectrum provided the evidence for the presence of Zn-NPs in the chitosan solution after six months of storage. The presence of Zn L α, Zn K α , Zn K β and the O K α peak at about 1.01 keV, 8.8 keV, 9.7 keV and 0.250 keV respectively could be observed [31].…”

Section: Characterizationmentioning

confidence: 92%

Improving stability of zinc nanoparticles in chitosan solution with a nanosecond pulsed laser

et al. 2019

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A green method is presented to fabricate zinc nanoparticles using laser ablation synthesis in a natural polymer solution. The main aims are to reduce the zinc nanoparticles size and to increase their stability by using different ablation times in a chitosan solution as a natural polymer stabilizer. A Nd:YAG pulsed laser (532 nm) of energy 60 mJ/pulse, with a pulse duration of 10 ns was used to ablate a zinc plate immersed in chitosan solution from which the nanoparticles were produced. The average particle sizes as well as the volume fraction of the zinc nanoparticles in the solution were measured at 5, 10, 15, 30 min of ablation time. The results showed that the particle size decreased from 9.43 to 5.04 nm with spherical morphology and its volume fraction increased from 0.24 × 10−7 to 8.5 × 10−7 as the ablation time progressed from 5 to 30 min respectively. As a comparative study, a reasonable decrease was observed in the particle size for chitosan than distilled water. It was also noted that the stability and dispersion of zinc nanoparticles were much higher in the chitosan solution compared to water. In addition, the COSMO (conductor-like screening model) solvation model was used to compare the enthalpies of Zn-NPs in different media. Obtained results confirmed their stability was higher when merged in a natural polymer compared to water.

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Micro-nanostructural and composition characterization of ZnO: Al doped films by SEM-EDX and HRTEM-EDX

Cited by 2 publications

References 11 publications

Synergistic Antibacterial Activity of Nanohybrid Materials ZnO–Ag and ZnO–Au: Synthesis, Characterization, and Comparative Analysis of Undoped and Doped ZnO Nanoparticles

Synergistic Antibacterial Activity of Nanohybrid Materials ZnO–Ag and ZnO–Au: Synthesis, Characterization, and Comparative Analysis of Undoped and Doped ZnO Nanoparticles

Improving stability of zinc nanoparticles in chitosan solution with a nanosecond pulsed laser

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