Effect of Silver Colloidal Concentration on Morphology of Silver Nanostructures Prepared by Chemical Reduction Method

Abstract

In this work, the effect of concentration of silver colloidal solution on the morphology of silver nanoparticles prepared from these solutions by chemical reduction method was studied. Different concentrations of silver colloidal solutions were prepared (2x10-3, 3x10-3, 4x10-3 and 5x10-3 mol/L) and glass substrates were coated with the prepared samples using dip coating. The change in color of the prepared colloidal solutions was considered as a primary indication to the formation of nanoparticles within the solutions as well as the aggregation of the formed nanoparticles. Scanning electron microscopy was used to determine the range of particle size of the prepared silver nanostructures. It was found that the concentration is a primary tool to control the range of nanoparticle size in order to serve certain applications of precious metal nanoparticle such as silver.