Premium
Microplasma‐ A ssisted Growth of Colloidal Silver Nanoparticles for Enhanced Antibacterial Activity
Author(s) -
Wang Ruixue,
Zuo Shasha,
Zhu Weidong,
Wu Shan,
Nian Weifeng,
Zhang Jue,
Fang Jing
Publication year - 2014
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201300038
Subject(s) - silver nanoparticle , microplasma , antibacterial activity , fourier transform infrared spectroscopy , colloid , dextran , nanoparticle , transmission electron microscopy , nuclear chemistry , bacterial growth , chemistry , materials science , chemical engineering , nanotechnology , analytical chemistry (journal) , bacteria , chromatography , organic chemistry , plasma , physics , quantum mechanics , biology , engineering , genetics
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 AgNO 3 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.