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Plasma-Liquid Synthesis of Silver Nanaoparticles and Anti-bacteria Activity Study - Introduction to Bio-application
Chapter 8
Plasma-Liquid Synthesis of Silver Nanaoparticles and Anti- bacteria Activity Study - Introduction to Bio-application
This chapter is based on:
Zhang W, Lin L, Li S, Sergey SA, Lemmens L, Brunsveld L, Chande C, Hessel V. Microplasma-assisted synthesis of silver nanoparticles using Tollens’ reagent. In preparation.
This chapter describes the direct synthesis of silver nanoparticles from Tollens’ reagent (Ag(NH3)2OH) via the plasma-liquid interactions. Due to the green, controllable and efficient properties of this nanofabrication technique, it can be considered as a promising direction for bio-applications. Therefore, anti-bacteria tests of the obtained Ag nanoparticles against E. coli. were performed to demonstrate their potential for bio-applications. The colloidal Ag nanoparticles were characterized by UV-Vis absorption spectroscopy to estimate the conversion efficiency. Morphology was investigated by TEM imaging. Electrochemical synthesis of AgNPs from silver nitrite (AgNO3) solution was carried out in the same reactor as reference. It was found that Ag(NH3)2OH based process has considerably faster reaction rate and higher conversion efficiency, with the obtained AgNPs being characteriszed by narrower size distribution and smaller average size compared to those generated from AgNO3 reaction system. Furthermore, antibacterial test, performed by applying synthesized and purified AgNPs against E. coli., demonstrated that AgNPs obtained from Ag(NH3)2OH have significantly higher antibacterial activity than AgNPs generated from AgNO3 solution as well as from commercially available AgNPs.

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