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Construction of Zinc Oxide into Different Morphological Structures to Be Utilized as Antimicrobial Agent against Multidrug Resistant Bacteria.

Elkady MF, Shokry Hassan H, Hafez EE, Fouad A - Bioinorg Chem Appl (2015)

Bottom Line: Nano-ZnO has been successfully implemented in particles, rods, and tubes nanostructures via sol-gel and hydrothermal techniques.The activity of produced nano-ZnO was determined by disc diffusion technique and the results revealed that ZnO nanotubes recorded high activity against the studied strains due to their high surface area equivalent to 17.8 m(2)/g.Although the annealing process of ZnO improves the degree of material crystallinity, however, it declines its surface area and consequently its antimicrobial activity.

View Article: PubMed Central - PubMed

Affiliation: Fabrication Technology Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications, Alexandria 21934, Egypt ; Chemical and Petrochemical Engineering Department, Egypt-Japan University of Science and Technology, New Borg El-Arab City, Alexandria 21934, Egypt.

ABSTRACT
Nano-ZnO has been successfully implemented in particles, rods, and tubes nanostructures via sol-gel and hydrothermal techniques. The variation of the different preparation parameters such as reaction temperature, time, and stabilizer agents was optimized to attain different morphological structures. The influence of the microwave annealing process on ZnO crystallinity, surface area, and morphological structure was monitored using XRD, BET, and SEM techniques, respectively. The antimicrobial activity of zinc oxide produced in nanotubes structure was examined against four different multidrug resistant bacteria: Gram-positive (Staphylococcus aureus and Bacillus subtilis) and Gram-negative (Escherichia coli and Pseudomonas aeruginosa) strains. The activity of produced nano-ZnO was determined by disc diffusion technique and the results revealed that ZnO nanotubes recorded high activity against the studied strains due to their high surface area equivalent to 17.8 m(2)/g. The minimum inhibitory concentration (MIC) of ZnO nanotubes showed that the low concentrations of ZnO nanotubes could be a substitution for the commercial antibiotics when approached in suitable formula. Although the annealing process of ZnO improves the degree of material crystallinity, however, it declines its surface area and consequently its antimicrobial activity.

No MeSH data available.


Related in: MedlinePlus

XRD patterns for ZnO nanopowders via sol-gel technique with different reaction times: (A) 3 h, (B) 6 h, (C) 12 h, (D) 24 h, and (E) 48 h.
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fig7: XRD patterns for ZnO nanopowders via sol-gel technique with different reaction times: (A) 3 h, (B) 6 h, (C) 12 h, (D) 24 h, and (E) 48 h.

Mentions: (i) Crystalline Structure (XRD).Figure 7 showed XRD patterns for ZnO nanopowder that was prepared at different reaction time intervals (3, 6, 12, 24, and 48 hours). All the diffraction peaks can be indexed as the hexagonal wurtzite structure with high crystallinity. No impurity peaks have been detected from the XRD spectrum, where the entire crystalline precursors have decomposed and grew into ZnO single crystals [37]. Moreover, it is clear that the increase in the reaction time improves the degree of crystallinity of the formed ZnO [38].


Construction of Zinc Oxide into Different Morphological Structures to Be Utilized as Antimicrobial Agent against Multidrug Resistant Bacteria.

Elkady MF, Shokry Hassan H, Hafez EE, Fouad A - Bioinorg Chem Appl (2015)

XRD patterns for ZnO nanopowders via sol-gel technique with different reaction times: (A) 3 h, (B) 6 h, (C) 12 h, (D) 24 h, and (E) 48 h.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4588359&req=5

fig7: XRD patterns for ZnO nanopowders via sol-gel technique with different reaction times: (A) 3 h, (B) 6 h, (C) 12 h, (D) 24 h, and (E) 48 h.
Mentions: (i) Crystalline Structure (XRD).Figure 7 showed XRD patterns for ZnO nanopowder that was prepared at different reaction time intervals (3, 6, 12, 24, and 48 hours). All the diffraction peaks can be indexed as the hexagonal wurtzite structure with high crystallinity. No impurity peaks have been detected from the XRD spectrum, where the entire crystalline precursors have decomposed and grew into ZnO single crystals [37]. Moreover, it is clear that the increase in the reaction time improves the degree of crystallinity of the formed ZnO [38].

Bottom Line: Nano-ZnO has been successfully implemented in particles, rods, and tubes nanostructures via sol-gel and hydrothermal techniques.The activity of produced nano-ZnO was determined by disc diffusion technique and the results revealed that ZnO nanotubes recorded high activity against the studied strains due to their high surface area equivalent to 17.8 m(2)/g.Although the annealing process of ZnO improves the degree of material crystallinity, however, it declines its surface area and consequently its antimicrobial activity.

View Article: PubMed Central - PubMed

Affiliation: Fabrication Technology Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications, Alexandria 21934, Egypt ; Chemical and Petrochemical Engineering Department, Egypt-Japan University of Science and Technology, New Borg El-Arab City, Alexandria 21934, Egypt.

ABSTRACT
Nano-ZnO has been successfully implemented in particles, rods, and tubes nanostructures via sol-gel and hydrothermal techniques. The variation of the different preparation parameters such as reaction temperature, time, and stabilizer agents was optimized to attain different morphological structures. The influence of the microwave annealing process on ZnO crystallinity, surface area, and morphological structure was monitored using XRD, BET, and SEM techniques, respectively. The antimicrobial activity of zinc oxide produced in nanotubes structure was examined against four different multidrug resistant bacteria: Gram-positive (Staphylococcus aureus and Bacillus subtilis) and Gram-negative (Escherichia coli and Pseudomonas aeruginosa) strains. The activity of produced nano-ZnO was determined by disc diffusion technique and the results revealed that ZnO nanotubes recorded high activity against the studied strains due to their high surface area equivalent to 17.8 m(2)/g. The minimum inhibitory concentration (MIC) of ZnO nanotubes showed that the low concentrations of ZnO nanotubes could be a substitution for the commercial antibiotics when approached in suitable formula. Although the annealing process of ZnO improves the degree of material crystallinity, however, it declines its surface area and consequently its antimicrobial activity.

No MeSH data available.


Related in: MedlinePlus