科研之友
微信
新浪微博
Facebook
分享链接
摘要
This paper presents a one-step method for the rapid synthesis of colloidal silver nanoparticles (AgNPs) for bacterial disinfection. Silver ions were electrochemically reduced to silver atoms in an AgNO3 solution with the assistance of an atmospheric argon microplasma jet. Dextran was used to stabilize the AgNPs in the liquid solution. Ultraviolet-visible spectroscopy, transmission electron microscopy, atomic force microscopy, and Fourier transform infrared spectroscopy were used to characterize the synthesized AgNPs. It was found that the size of the nanoparticles can be controlled by adjusting the dextran monomer/Ag+ molar ratio in the solution. Furthermore, antibacterial activity of the as-synthesized AgNPs against Escherichia coli and Staphylococcus aureus was carried out in liquid as well as on solid growth media, as a function of the AgNPs concentration. The results showed that the AgNPs had a significant antibacterial activity against those bacteria cells and the minimum inhibition concentration was associated with the type of bacteria and initial bacterial concentration.
- 出版日期2014-1
- 单位北京大学
