Antifungal Properties of Ag-SiO₂ Core-Shell Nanoparticles against Phytopathogenic Fungi

Abstract:

Silver nanoparticles have been extensively used as the anti-microbial agent in medicine. The present study addressed their antifungal potential against phytopathogenic fungi. Ag-SiO2 core–shell nanoparticles (Ag-SiO2 NPs) with an average size of 118.2 ± 4.6 nm were successfully prepared. The released Ag+ slowly through the outer porous SiO2 coating layer from the silver cores was detected in potato dextrose medium, reaching a peak value of 0.016 ppm around day 4. Ag-SiO2 NPs have displayed excellent antifungal effects against tested phytopathogenic fungi even at a low concentration of 0.5 ppm. The antifungal activity of these Ag-SiO2 NPs is not just the effect of dissolved Ag+ released from the nanoparticles. Our results suggested that the induced reactive oxygen species (ROS) by Ag-SiO2 NPs were involved in the effect of growth inhibition on tested fungi.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 814-818
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.814
• Online since: February 2012
• Authors: Li Ping Zheng, Zhen Zhang, Ben Zhang, Jian Wen Wang
• Keywords: Ag-SiO₂ Core-Shell Nanoparticles, Fungal Growth Inhibition, Phytopathogenic Fungi, Reactive Oxygen Species

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