"Nanotechnology and nanomaterials"

Synthesis of silver nanoparticles by contact glow discharge electrolysis in sodium polyacrylate (NaPa) solutions 
Kuntyi O.1, Kytsya A.2, Karpenko E.2, Bondarenko A.1, Mazur A.1, Bazylyak L.2, Koretska N.2, Zayarnyuk A.2
1Department of Chemistry and Technology of Inorganic Substances, Lviv Polytechnic National University, Bandery Str. 12, 79013 Lviv, Ukraine.
E-mail: kunty@ukr.net
2Department of Physical Chemistry of Fossil Fuels InPOCCC, NAS of Ukraine, Naukova Str. 3а, 79060, Lviv, Ukraine. 

The purpose of this work is to research the synthesis of silver nanoparticles (AgNPs) by electrolysis of glow discharge plasma [1]. It is shown, that in NaPA solution, at U = 180-250 V, AgNPs with sizes of 20 nm are formed (fig.1). 
		
Fig. 1. TEM images of AgNPs of stabilized NaPa with a concentration of 2 g/L and histograms of the relative count depending on nanoparticle size. 

It is shown, with increasing NaPa concentration and electrolysis duration, the size of nanoparticles increases. Technological parameters that provide a high rate of synthesis of colloidal AgNPs solutions with controlled nanoparticle sizes have been established.
The antimicrobial activity and phytotoxicity of the synthesized nanoparticles was studied. The effective biocidal effect of the test bacteria Xantomonas campestris and Agrobacterium tumefaciens was shown, as well as low toxicity, which indicates perspective for their practical application.

1.	Sen Gupta S.K. Contact Glow Discharge Electrolysis: A Novel Tool for Manifold Applications // Plasma Chem. Plasma Process. – 2017 – V. 37. – P. 1-49.