Novel synthesis of Ag@AgCl/ZnO by different radiation sources including radioactive isotope 60Co: Physicochemical and antimicrobial study

• Published in: Applied surface science Vol. 529; p. 147098
• Main Authors: Svoboda, Ladislav, Bednář, Jiří, Dvorský, Richard, Rybková, Zuzana, Malachová, Kateřina, Henych, Jiří, Matýsek, Dalibor, Němečková, Zuzana
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-11-2020
• Subjects: Ag@AgCl/ZnO; Antimicrobial activity; Nanocomposite; Radiation-assisted methods; Silver chloride; Zinc oxide; Ag@AgCl/ZnO; Radiation-assisted methods; Zinc oxide; Silver chloride; Antimicrobial activity; Nanocomposite
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2020.147098

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•Novel one-step radiation-assisted method for modification of ZnO by Ag@AgCl.•P. aureginosa showed 100 times higher sensitivity for Ag@AgCl/ZnO than in the case of pure ZnO.•Provide useful insights in use of different radiation sources including radioactive isotope 60Co for Ag@AgCl/ZnO synthesis.•Research suggests synthesis of other different metallic NPs with antimicrobial activity by using γ- and β- -radiation.
This research has revealed the promising, environmentally friendly and one-step modification of ZnO nanoparticles (NPs) based on radiation-assisted method for antimicrobial applications. Commercially available ZnO NPs were modified in aqueous solution of silver nitrate in the presence of the artificial radiation by using different sources of radiation such as high-power UV/Vis LED units and radioactive isotope 60Co. New nanocomposites were characterized by XRD, TEM, HRTEM, HRSTEM with 3D element mapping, DRS and PL spectrometry. The results showed that all samples were composed of Ag@AgCl NPs connected with ZnO NPs via stable heterojunction. The use of different radiation had significant influence on the prepared composites and the final antimicrobial activity against Gram-negative Escherichia coli, Pseudomonas aeruginosa, and Gram-positive Streptococcus salivarius, Staphylococcus aureus bacteria strains and yeast Candida albicans. The possible influence of irradiation on the final physiochemical and antimicrobial activity of Ag@AgCl/ZnO nanocomposites was proposed. It was found that the Ag@AgCl/ZnO irradiated by γ- and β- -radiation exhibited the highest antimicrobial activity.