<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>Silver colloidal nanoparticles were prepared according to the chemical reduction method in which the ascorbic acid was used as a reducing agent and sodium citrate as a stabilizing agent. The absorption spectra of all prepared samples obtained using the UV-Vis spectrophotometer showed a surface plasmon peak at a wavelength of about 420 nm. The size of the silver nanoparticles was controlled by changing the pH values of the reaction system. At high pH, smaller size silver nanoparticles were obtained compared to low pH values. This difference can be attributed to the difference in the reduction rate of the precursor. In addition to the inverse proportionality between the size and the pH value it is clear that increasing the pH value enables us to obtain spherical nanoparticles while at low pH, rods and triangular particle shapes were formed. Poor balance between nucleation and growth processes could be the cause of this result.</p></abstract>

Silver colloidal nanoparticles were prepared according to the chemical reduction method in which the ascorbic acid was used as a reducing agent and sodium citrate as a stabilizing agent. The absorption spectra of all prepared samples obtained using the UV-Vis spectrophotometer showed a surface plasmon peak at a wavelength of about 420 nm. The size of the silver nanoparticles was controlled by changing the pH values of the reaction system. At high pH, smaller size silver nanoparticles were obtained compared to low pH values. This difference can be attributed to the difference in the reduction rate of the precursor. In addition to the inverse proportionality between the size and the pH value it is clear that increasing the pH value enables us to obtain spherical nanoparticles while at low pH, rods and triangular particle shapes were formed. Poor balance between nucleation and growth processes could be the cause of this result.

pH effect on the aggregation of silver nanoparticles synthesized by chemical reduction

Physics Department, Jordan University of Science and Technology, Irbid, Jordan

Al-Huson University College, Al-Balqa applied University, Huson-Irbid, Jordan

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Silver colloidal nanoparticles were prepared according to the chemical reduction method in which the ascorbic acid was used as a reducing agent and sodium...

pH effect on the aggregation of silver nanoparticles synthesized by chemical reduction

Published Online: Mar 26, 2014

Page range: 107 - 111

DOI: https://doi.org/10.2478/s13536-013-0166-9

Keywords
silver nanoparticles, pH, chemical synthesis

© 2014 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

pH effect on the aggregation of silver nanoparticles synthesized by chemical reduction

Published Online: Mar 26, 2014

Page range: 107 - 111

DOI: https://doi.org/10.2478/s13536-013-0166-9

Keywordssilver nanoparticles, pH, chemical synthesis

© 2014 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
silver nanoparticles, pH, chemical synthesis