Conferences

Reception and application of nanoparticles, containing copper and silver

К.G.Lopatko,
 
Y.G.Aftandilyants,
   

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Electrical Contacts and Electrodes - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2010, #10
http://www.materials.kiev.ua/article/480

Abstract

Results of research of structure and properties of nanoparticles, which received by electrospark treatment of copper and silver are shown. Influence of electrical discharge power to chemical composition of nanoparticles is also presented. Сhemical composition of nanoparticle surfaces was investigated by the method of X-ray photoelectronic spectroscopy. It was discovered that oxygen is present on nanoparticle surfaces. Nanoparticles consist of Cu2O, which appear at initial stage of synthesis and, possibly, become places for copper, oxides of CuO, molecules of Н2О and hydroxyl-group of ОН- adsorption. Layers of CuO, molecules of Н2О and anions of ОН- are removed from the nanoparticle surfaces at heating of dispersible phases up to 120-180 ?C.To decrease silver nanoparticle surface oxidization, its colloidal solutions must be synthesized at minimum water temperature (near 0 ?C). Peak discharge power reduction may also provide similar result.Examples of nanoparticles application are shown.


CHEMICAL COMPOSITION, COPPER, DISINFECTION, ELECTRICAL SPARK TREATMENT, NANOPARTICLES, SILVER, SURFACE