Preparation of gold nano-clusters in using photographic film (3):analysis of the growth rate of gold clusters

摘要

When an exposed photographic films is immersed in a gold(I) thiocyanate complex solution for several to severalten days,a gold cluster grows on a latent image speck.Growht rates of gold clusters at different concentrations of the gold solution were obtained from the lasmon absorption of the clusters or from the cluster size.Both rates increased with increasing the gold concentration.Absorption spectra and size distriubtions were similar at a condition that showed similar absorption peak height with the combination of different concentrations and immersion periods.Characteristics of the gold clusters did not change with increasing the concentration and so there would be no change on the formation process.Analysis of growth rate suggested that the deposition of gold was a diffusion-controlled process.