Preparation and Antibacterial Properties of Silver Nanowires

Abstract

Silver ions have superior bactericidal properties, and their bactericidal activity ranks second among all metals (mercury ranks first, toxic, not used now). Due to its unique physical and chemical properties, nano-silver has also received increasing attention from researchers, and its antibacterial properties are far superior to traditional silver ion bactericides, such as silver nitrate and silver sulfadiazine. But the properties and performance of nanosilver materials depend on their size and morphology.In this paper, the nano-silver line was prepared by the polyol method. By controlling the ratio of AgNO3and PVP, the concentration of NaCl and the acidity and alkalinity of the reaction solution, the effects of reaction time and reaction temperature on the morphology and diameter of the silver wire were investigated. The antibacterial properties of nanosilver were determined by the perforation inhibition method. The experimental results showed that as the reaction temperature increased, the silver particles in the product decreased significantly, the diameter of the silver wire tended to be uniform, but the diameter increased. Finally, the optimal reaction temperature for preparing the silver oxide wire by the polyol method was 150 °C, the reaction time was 10 hours, and the diameter of the silver wire was 100 nm to 200 nm. Based on the measurement of the antibacterial diameter of nano-silver with different morphologies on Escherichia coli and Staphylococcus aureus, it can be found that nano-silver with different morphologies has excellent antibacterial effect, and silver cube is superior to silver particles and nano-silver lines.