影像科学与光化学 ›› 1997, Vol. 15 ›› Issue (3): 230-231.DOI: 10.7517/j.issn.1674-0475.1997.03.230

• 研究简报 • 上一篇    下一篇

电镜法对硫敏化中心的直接观察

胡勇军, 王荣琴, 彭必先   

  1. 中国科学院感光化学研究所, 北京 100101
  • 收稿日期:1996-08-26 修回日期:1997-01-10 出版日期:1997-08-20 发布日期:1997-08-20
  • 通讯作者: 彭必先
  • 基金资助:
    国家自然科学基金( 批准号: 29473138) ;美国柯达公司资助

DIRECT OBSERVATION ON THE SULFUR SENSITIZATION CENTERS WITH ELECTRON MICROSCOPY

HU Yongjun, WANG Rongqin, PENG Bixian   

  1. Institute of Photographic Chemistry, Chinese Acadeng of Sciences, Beijing 100101, P. R. China
  • Received:1996-08-26 Revised:1997-01-10 Online:1997-08-20 Published:1997-08-20

摘要: 敏化中心的形成是Ag2S的聚集过程, 一般包括两步[1]. 在第一步中, 增感剂中的硫离子与银离子在AgX晶体表面生成Ag2S分子, 然后, 多个Ag2S分子接合(coalescence)形成敏化中心.

关键词: 硫增感, 扁平颗粒, 增感中心分布, 电子显微镜

Abstract: irect observation of the sulfur sensitization centers with electron microscopy was made on silver halide tabular grains. It was found that the sulfur sensitization centers are mainly localized on the central part of core-shell tabular grain. The linear dimensions of sulfur sensitization centers are distributed between 6 nm to 250 nm with a peak maximum of 50 nm. The number of silver sulfide molecules contained in the sensitization clusters are evaluated and discussed.

Key words: sulfur sensitization, tabular grain, sensitization center distribution, electron microscopy