Size evolution effect of the reduction rate on the synthesis of gold nanoparticles

This study is a synthesis and characterization of water-soluble dispersed gold nanoparticles by the reduction of sodium tetrachloroaurate precursor solution by using L-valine, L-Tryptophane and L-Alanine. The size of the particles was investigated as a function of the reduction rate of the gold ions. The reduction rate was controlled by changing the rate at which reducing agent was added to the gold salt solution. The result showed that the size was changed by the reduction rate. It was found by Transmission Electron Microscopy (TEM) observation that the lower the reduction rate, the greater the mean diameter of gold nanoparticles. The mean diameter varied from 10 to 35 nm. This change was also seen in the UV-Vis absorption spectra.

کلیدواژه ها:

“Gold nanoparticles ، ” “L-Alanine ، ” “L-Tryptophane ، ” “L-Valine ، ”