Direct current atmospheric pressure glow discharge generated between a pin‐type solid cathode and a flowing liquid anode as a new tool for silver nanoparticles production

Abstract

Direct current atmospheric pressure glow discharge (dc‐APGD), generated between a pin‐type tungsten solid cathode and the surface of a flowing liquid anode (FLA), was used to synthesize Ag nanoparticles (AgNPs) and gelatin‐stabilized Ag nanoparticles (GEL‐AgNPs) in a flow‐through plasma‐reaction system. To characterize the nanostructures, UV/Vis absorption spectrophotometry, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) were applied. Resulting GEL‐capped AgNPs were more stable and lower in size than AgNPs. By applying attenuated total reflectance Fourier transform infrared spectroscopy (ATR FT‐IR) and FT‐Raman spectroscopy, possible functionalization of the AgNPs surface by GEL after dc‐APGD treatment was examined. The described method was robust and provided high amounts of the suspensions of nanocolloidal Ag.