Journal of Nanoparticle Research

, Volume 13, Issue 5, pp 1865–1872 | Cite as

Continuous synthesis of colloidal silver nanoparticles by electrochemical discharge in aqueous solutions

  • Kuo-Hsiung Tseng
  • Yu-Chun Chen
  • Jing-Jong Shyue
Research Paper


This article presents an electrochemical discharge (ECD) method that consists of a combination of chemical methods and electric arc discharges. In the method, 140 V is applied to an Ag electrode from a DC power supply. The arc-discharge between the electrodes produces metallic silver nanoparticles and silver ions in the aqueous solution. Compared with the original arc discharge, this ECD method creates smaller nanoparticles, prevents clumping of the nanoparticles, and shortens the production time. The citrate ions also reduce the silver ions to silver nanoparticles. In addition, the citrate ions cap the surface of the produced silver nanoparticles and the zeta potential increases. In this article, the weight loss of the electrodes and the reduction of silver ions to silver nanoparticles as a function of citrate concentration and electric conductivity of the medium are discussed. Furthermore, the properties of the colloidal silver prepared with ECD are analyzed by UV–Vis spectroscopy, dynamic light scattering, electrophoresis light scattering, and scanning electron microscopy. Finally, a continuous production apparatus is presented for the continuous production of colloidal silver.


Arc discharge Electrochemical Silver Nanoparticle Colloidal 


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Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Kuo-Hsiung Tseng
    • 1
  • Yu-Chun Chen
    • 1
  • Jing-Jong Shyue
    • 2
    • 3
  1. 1.Department of Electrical EngineeringNational Taipei University of TechnologyTaipeiTaiwan
  2. 2.Research Center for Applied Sciences, Academia SinicaTaipeiTaiwan
  3. 3.Department of Materials Science and EngineeringNational Taiwan UniversityTaipeiTaiwan

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