Synthesis of Zinc Oxide Nanoparticles Coated with Silicon Oxide

2020 ◽  
Vol 492 (1) ◽  
pp. 69-72
Author(s):  
V. V. Butova ◽  
V. A. Polyakov ◽  
E. A. Erofeeva ◽  
Zhengyou Li ◽  
M. A. Soldatov ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Silicon Oxide ◽  
Oxide Nanoparticles

scholarly journals Influence of Nanosized Silicon Oxide on the Luminescent Properties of ZnO Nanoparticles

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Vitaliy Shvalagin ◽  
Galyna Grodziuk ◽  
Olha Sarapulova ◽  
Misha Kurmach ◽  
Vasyl Granchak ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Luminescence Intensity ◽  
Zinc Oxide Nanoparticles ◽  
Food Packaging ◽  
Silicon Oxide ◽  
Luminescent Properties ◽  
Colloidal Synthesis ◽  
Quantum Yields ◽  
Oxide Nanoparticles

For practical use of nanosized zinc oxide as the phosphor its luminescence quantum yields should be maximized. The aim of this work was to enhance luminescent properties of ZnO nanoparticles and obtain high-luminescent ZnO/SiO2composites using simpler approaches to colloidal synthesis. The luminescence intensity of zinc oxide nanoparticles was increased about 3 times by addition of silica nanocrystals to the source solutions during the synthesis of ZnO nanoparticles. Then the quantum yield of luminescence of the obtained ZnO/SiO2composites is more than 30%. Such an impact of silica is suggested to be caused by the distribution of ZnO nanocrystals on the surface of silica, which reduces the probability of separation of photogenerated charges between the zinc oxide nanoparticles of different sizes, and as a consequence, there is a significant increase of the luminescence intensity of ZnO nanoparticles. This way of increasing nano-ZnO luminescence intensity facilitates its use in a variety of devices, including optical ultraviolet and visible screens, luminescent markers, antibacterial coatings, luminescent solar concentrators, luminescent inks for security printing, and food packaging with abilities of informing consumers about the quality and safety of the packaged product.

scholarly journals Síntesis y caracterización de nanopartículas de ZnO embebidas dentro de una matriz de SiO2 (SiO2/n-ZnONP/SiO2/p-Sisustrato) depositadas mediante sputtering reactivo

2019 ◽  
Author(s):  
◽  
Mario Francisco Ávila Meza
Keyword(s):  
Zinc Oxide ◽  
Silicon Dioxide ◽  
Silicon Substrate ◽  
Zinc Oxide Nanoparticles ◽  
Silicon Oxide ◽  
Oxide Nanoparticles ◽  
Transmission Microscopy ◽  
X Ray ◽  
Type Silicon ◽  
P Type

The synthesis of zinc oxide nanoparticles, confined in a matrix of silicon dioxide from pure zinc and silicon targets, on a p-type silicon substrate was carried out. The technique of reactive cathodic erosion assisted by radio frequency without heat treatment after the deposit of the materials was used. The morphological, chemical, physical and electrical characterization of the structures obtained was carried out. It was possible to obtain a layer of SiO2 with roughness in the range of nanometers, on silicon substrates, controlling the partial pressure of oxygen during the process of cathodic erosion. The basins, typical of the roughness of the material obtained, served to house the metallic Zn, promoting its nucleation and its partial oxidation in a space reduced to the scale of nanometers. Subsequently, the complete oxidation of Zn and its confinement was achieved by depositing another layer of SiO2, obtaining samples with the structure: the p-type silicon substrate, a thin-roughness film of silicon oxide, n-type zinc oxide nanoparticles and finally a second layer of silicon oxide which completed the matrix; SiO2/n-ZnONP/SiO2/p-Sisustrate. First, the surface morphology of the samples is analyzed by atomic force, scanning and transmission microscopy, X-ray diffraction, and UV-visible light spectroscopy. The silicon dioxide composition of the first deposited layer is demonstrated by infrared spectroscopy. The presence and distribution of Zn particles were obtained through spectroscopy by scattered X-ray energies and by secondary ion mass spectroscopy. Subsequently, the presence of the stoichiometric ZnO compound is confirmed by X-ray photoelectric electron spectroscopy. The presence of ZnO particles with size <10 nm with hexagonal crystalline structure is evidenced by transmission electron microscopy. Finally, the rectifying behavior, typical of a p-n junction, and its electrical response to light by means of current-voltage, measurements in lighting and dark regime is demonstrated. The variation of its electrical characteristics to the stimulus of different wavelengths is evidenced by the spectral response technique.

Optical Characteristics of Zinc Oxide Nanoparticles with Surface Modification Using Polyethylene Glycol

2014 ◽  
Vol 29 (10) ◽  
pp. 1039
Author(s):  
TAN Man-Lin ◽  
WANG Yan-Tao ◽  
ZHANG Wei-Li ◽  
FU Dong-Ju ◽  
LI Dong-Shuang ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Surface Modification ◽  
Polyethylene Glycol ◽  
Zinc Oxide Nanoparticles ◽  
Optical Characteristics ◽  
Oxide Nanoparticles

A comparative study of the antibacterial activity of Quercus robur (Ethanolic extract) and Zinc oxide nanoparticles on Salmonella (In vitro)

2018 ◽  
Vol 9 (SPL1) ◽  
Author(s):  
Hams H. H. Alfattli ◽  
Ghufran Zuhair Jiber ◽  
Ghaidaa Gatea Abbass
Keyword(s):  
Zinc Oxide ◽  
Antibacterial Activity ◽  
Zinc Oxide Nanoparticles ◽  
Quercus Robur ◽  
Ethanolic Extract ◽  
Inhibitory Effect ◽  
Significant Inhibition ◽  
Oxide Nanoparticles ◽  
Inhibition Zones

This study which designed to evaluate the inhibitory effect of Ethanolic extract of (Quercusrobur) and Zinc oxide nanoparticles on the growth of one genus of enterobacteriacae (Salmonella). In vitro. For this purpose graduate concentrates for plant extract (50, 100, 200, 400 )mg/ml which prepared and compared with Zinc oxide nanoparticles of different concentration (2, 1, 0.5, 0.25) μg/ml,and examined. The result showed that the studied medicinal plant has antibacterial activity against this bacteria which used. The result showed that the plant has good activity in decrease the growth of this bacteria. The results of the study also showed that the nano-ZnO has very effective antibacterial action against the studied bacteria which was Salmonella,nanoparticles concentrations lead to increasing in the inhibition zones of tested bacterial growth. We also study the effect of three antibiotics Lomefloxacin (LOM), Ciprofloxacin (SIP) and Rifampin (RA) and the result showed,in a comparison within the tested bacteria,Salmonella had a significant inhibition increase in Lomefloxacin ; the ciprofloxacin showed effect on tested bacteria. However,Rifampin does not show any effect on tested bacteria.

Evaluation of the Effect of Nanoparticles Zinc Oxide/Camellia sinensis Complex on the Kidney of Rats Treated with Monosodium Glutamate: Antioxidant and Histological Approaches

2019 ◽  
Vol 20 (7) ◽  
pp. 542-550 ◽  
Author(s):  
Nahla S. El-Shenawy ◽  
Reham Z. Hamza ◽  
Fawziah A. Al-Salmi ◽  
Rasha A. Al-Eisa
Keyword(s):  
Zinc Oxide ◽  
Camellia Sinensis ◽  
Zinc Oxide Nanoparticles ◽  
Morphological Changes ◽  
Monosodium Glutamate ◽  
Oxide Nanoparticles ◽  
High Dose ◽  
Enzymatic Antioxidants ◽  
Zno Nps ◽  
Tea Extract

Background: Zinc oxide nanoparticles (ZnO NPs) are robustly used biomedicine. Moreover, no study has been conducted to explore the consequence of green synthesis of ZnO NPs with Camellia sinensis (green tea extract, GTE) on kidneys of rats treated with monosodium glutamate (MSG). Methods: Therefore, the objective of the research was designed to explore the possible defensive effect of GTE/ZnO NPs against MSG-induced renal stress investigated at redox and histopathological points. Results: The levels of urea and creatinine increased as the effect of a high dose of MSG, in addition, the myeloperoxidase and xanthine oxidase activates were elevated significantly with the high dose of MSG. The levels of non-enzymatic antioxidants (uric acid, glutathione, and thiol) were decreased sharply in MSG-treated rats as compared to the normal group. Conclusion: The data displayed that GTE/ZnO NPs reduced the effects of MSG significantly by reduction of the level peroxidation and enhancement intracellular antioxidant. These biochemical findings were supported by histopathology evaluation, which showed minor morphological changes in the kidneys of rats.

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