The effects of free volume holes in the photographic gelatin inthe electroless deposition process was studied by positronannihilation technology in this paper. The results show that, aftercomplete activation, the average volume of the free volume holes inphotographic gelatin decreased by about 0.011 nm~3, which isequivalent to the volume of a gold atom. On an average basis, everyfree volume hole was filled by a gold atom which catalysed theelectroless copper deposition. The copper grain formed in theelectroless copper deposition was not filamentary in shape but aspherical stack. After electroless copper deposition was completed,the average volume of the free volume holes in the photographicgelatin decreased by about 0.020 nm~3, which is equivalent to thevolume of three copper atoms. Therefore, the deposition of copper inisotropic and spherical form was not hindered by free volume holes inphotographic gelatin.
展开▼
