Preparation of gold nano-particles using photographic materials: Effect of KSCN concentration in a gold deposition solution

Abstract

We have proposed the new method to prepare a photographic image with gold particles dispersed in a gelatin layer using photographic materials. When the exposed photographic film is immersed in the gold thiocyanate complex solution consisted of gold (I) thiocyanate complex, gold atoms are deposited on silver halide grains in the exposed area. One disadvantage of this process is a long immersion period, which is for several hours to several ten days. We found that the ratio of Au to KSCN in the deposition solution affected the deposition rate and the deposition rate would be increased in decreasing the KSCN. Furthermore, there is a possibility that this kind of method may uniform the sizes of the gold particles. This factor is of great important for making smooth gold layer after baking.