Preparation and quantum size effect of nanometer-sized AgBr/I photographic emulsion

摘要

As we all know, the ultra-fine grain silver halide emulsion has played an important role in holography. The preparation for this kind of emulsions may be traced back to Lippmann emulsions about one hundred years ago~([1]). The Crawford method published in 1954~([2]) was one of the improved methods aftereard. The mean size is about 50nm usually. The character of the preparation for this kind of emulsion may be summarized as follows: low concentration of silver nitrate and potassium bromide, high proportion of gelatin and lower temperature in reaction.