@conference{
author = "Nikolić, Nebojša D. and Avramović, Ljiljana and Maksimović, Vesna and Pavlović, Miroslav and Perać, Sanja and Stevanović, Jasmina and Bugarin, Mile",
year = "2017",
abstract = "Silver powder particles of nanostructured characteristics were produced by the galvanostatic regime of electrolysis and compared with those obtained by chemical reduction with hydrazine.
Morphology of all types of powder particles was examined by the technique of scanning electron
microscopy (SEM), while crystallographic characteristics were examined by the X-ray diffraction
(XRD) analysis of the obtained particles. Morphology of the electrochemically produced powder
particles strongly depended on the type of used electrolyte. The irregular crystals and the needle-like dendrites were predominately formed from the nitrate (acid) electrolyte. On the other hand, the
3D pine-like dendrites very similar to Cu dendrites [1] were formed by the electrodeposition from
the ammonium (alcali) electrolyte. Simultaneously, the particles of spherical shape were formed by
chemical reduction with hydrazine. The difference in morphology of electrochemically produced
Ag powders can be explained by different rate of the electrochemical process by which they are
formed. Namely, the ammonium electrolyte belongs to the group of the complex electrolyte and
formation of this complex lowers the exchange current density for Ag causing a transfer of Ag from
the group of the normal metals (metals with the high values of the exchange current density) to the
group of the intermediate metals (metals with the medium values of the exchange current density).
Irrespective of the way of preparation of Ag powder, Ag crystallites in all types of powder particles
were predominantly oriented in the (111) plane. Formation of powder particles of the different shape with the strong (111) preferred orientation was discussed and explained by the consideration of the general characteristics of the growth of a crystal in the crystallization and
electrocrystallization processes. Analogy between these two types of processes was made and discussed.",
publisher = "Bulgaria, Sofia : Institute of Physical Chemistry, Bulgarian Academy of Science",
journal = "Programme and Book of Abstracts - 12th International Workshop on Electrodeposited Nanostructures (EDNANO - 12), March 16-18, Sofia, Bulgaria",
title = "Comparative analysis of chemically and electrochemically produced silver powders of nanostructural characteristics",
pages = "47-47",
url = "https://hdl.handle.net/21.15107/rcub_cer_6650"
}
