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Published: 2024-06-03
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DOI: https://doi.org/10.53747/nst.v13i4.415
Issue
Vol. 13 No. 4 (2023)
Section
Articles
How to Cite
Nguyen Thi Kim, L., Nguyen Chi, T., & Nguyen Ngoc, D. (2024). Synthesis of silver nanoparticles embedded on silica by gamma irradiation for utilization as antimicrobial agents. Nuclear Science and Technology, 13(4), 21-27. https://doi.org/10.53747/nst.v13i4.415

Synthesis of silver nanoparticles embedded on silica by gamma irradiation for utilization as antimicrobial agents

Lan Nguyen Thi Kim1, Thuan Nguyen Chi, Duy Nguyen Ngoc
1 Research and Development Center for Radiation Technology

Main Article Content

Abstract

Silver nanoparticles deposited on silica (Ag nano/SiO2) have been prepared by Co-60 gamma irradiation of the mixture Ag+/SiO2/H2O/ethanol. The reduction of Ag+ in the suspension of SiO2 is brought by e-aq and H· generated during the radiolysis of water/ethanol solution. The presence of SiO2 prevents agglomeration of Ag clusters. The conversion dose (Ag+® Ag0) was determined by UV-Vis spectroscopy. Transmission electron microscopy (TEM) characterized the size of Ag nanoparticles. As a result, the particle sizes were determined to be in the range of 5-20 nm for an Ag+ concentration of 5 mM. The crystal structure of silver nanoparticles was also investigated by X-ray diffraction (XRD). In addition, the antifungal activity of Ag nano/SiO2 was tested against Aspergillus niger var Tieghn by plate count method. The results indicated that the antifungal efficiency of Ag nano/SiO2 was about 64, 71, 81, 82, and 96% at the concentrations of Ag nanoparticles of 30, 50, 70, 100, and 150 ppm, respectively.

Article Details

Keywords

silver nanoparticles, silica, gamma irradiation, antimicrobial agent

References

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