硫敏化中心中的银原子簇的增感作用

采用一定电位范围内的氧化还原缓冲液处理单分散立方溴化银乳剂颗粒表面上的硫敏化中心和由曝光生成的潜影中心,考察银原子簇的漂白和再生后的曝光效应曲线。实验结果再一次确认硫敏化中心中存在的银原子簇对硫敏化起重要作用,而且敏化效果也与银原子簇的含量有关。为此,提出硫敏化中心是由硫化银簇与银簇组成,它们在潜影形成的过程中各起不同的作用,但都有利于提高潜影的生成效率,因而共同产生敏化效应。

SENSITIZATION OF SILVER CLUSTERS IN SULFUR SENSITIZATION CENTERS

Redox buffers in the range of certain potentials were adopted to treat both sulfur sensitization centers on the surface of mono dispersed cubic silver bromide and latent image centers formed during exposures in order to examine their respective response curves after bleaching and regeneration of silver clusters. Experimental results confirmed that there were silver clusters in the sulfur sensitization centers, which played an important role in the sulfur sensitization as well as the sensitization efficiency seemed to be related to content of silver. For this reason, it has been proposed that the sulfur sensitization centers consist of silver sulfide clusters and silver clusters, in which these two kinds of clusters may have different functions in the process of latent image formation, but both are advantageous to increase in the efficiency of LI formation.