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Antimicrobial colloidal silver solutions. Preparation and characterization

A. PETICA1,* , N. BURUNTEA1, C. NISTOR2, C. R. IONESCU3

Affiliation

  1. INCDIE ICPE-Advanced Research, Bucharest, Romania
  2. ICECHIM Bucharest, Romania
  3. U.M.F. "Gr.T.Popa", Iassy, Romania

Abstract

Colloidal silver solutions involving electrochemical technique, through “sacrificial” Ag electrodes method have been prepared, using different stabilizers and co-stabilizers. A constant current pulse generator, model CS1-12 with stirrer has been used at different working times. The effects of various surfactants content on the Ag concentration (ppm) and UV-Vis spectra for silver nanoparticles were determined with a spectrophotometer UV-Vis Jasco V500; the nanoparticles sizes have been analyzed through DLS (Dynamic Light Scattering) technique involving a Zetasizer Nano equipment and their morphology has been evidenced by TEM. To evaluate antimicrobial effect antibiogram method has been used, involving various test fungi containing different micotoxines. Using this method a stable nano-Ag based colloidal solutions until 35 ppm Ag were obtained and colloidal solutions have good antimicrobial properties..

Keywords

Silver colloidal solutions, Silver nanoparticles, Stabilization with polymers.

Submitted at: March 23, 2007
Accepted at: Nov. 16, 2007

Citation

A. PETICA, N. BURUNTEA, C. NISTOR, C. R. IONESCU, Antimicrobial colloidal silver solutions. Preparation and characterization, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 11, pp. 3435-3439 (2007)