Which one less toxic and good as antimicrobial of all these. green NPs: Ag NPs , ZnO NPs , FeONPs , CuO NPs. which synthesis using plant extract as a reducing agent
I have conducted studies on the antibacterial properties of nanoparticles,
Synthesis, characterization and electrical properties of SnO2/CuO nanocomposite
Antibacterial activity of Na2O/CuO nanocomposite for potential biomedical applications
NiAl2O4 بررسی خواص ساختاری و ضد باکتری نانوکامپوزيت تهيه شده توسط روش سل- ژل
and based on them, I can tell you that this is a relative property and depends on the conditions. My suggestion is that you read different articles and summarize their results and finally compare them.
you can see the following articles:
Review on Zinc Oxide Nanoparticles: Antibacterial Activity and Toxicity Mechanism
The antimicrobial activity of nanoparticles: present situation and prospects for the future
Antimicrobial, antioxidant, and cytotoxic properties of biosynthesized copper oxide nanoparticles (CuO-NPs) using Athrixia phylicoides DC
Antibacterial Activity Comparison of Three Metal Oxide Nanoparticles and their Dissolved Metal Ions
A Mini Review of Antibacterial Properties of ZnO Nanoparticles
Antibacterial activity and toxicity of silver – nanosilver versus ionic silver
Comparison of characteristics and biocompatibility of green synthesized iron oxide nanoparticles with chemical synthesized nanoparticles
Antimicrobial Properties of Metal Nanoparticles and Their Oxide Materials and Their Applications in Oral Biology
Synthesis, Characterization and Applications of Biogenic Iron Oxide Nanoparticles