影像科学与光化学 ›› 1992, Vol. 10 ›› Issue (4): 340-346.DOI: 10.7517/j.issn.1674-0475.1992.04.340

• 研究论文 • 上一篇    下一篇

Sabatier效应机理的研究

陶淳, 庄思永, 谢波平   

  1. 中国科学技术大学近代化学系, 合肥 230026
  • 收稿日期:1991-10-11 修回日期:1992-03-30 出版日期:1992-11-20 发布日期:1992-11-20
  • 通讯作者: 庄思永

ON THE MECHANISM OF SABATIER EFFECT

TAO CHUN, ZHUANG SI-YONG, XIE BO-PING   

  1. Department of Modern Chemistry University of Science and Technology of China Hefei 230026, P. R. China
  • Received:1991-10-11 Revised:1992-03-30 Online:1992-11-20 Published:1992-11-20

摘要: 通过对核壳乳剂以及均质乳剂潜影分布和sabatier效应的研究,提出了产生Sabatier效应的可能机理:第一次曝光产生的表面潜影吸附了显影剂负离子以后变成空穴捕获中心而在第二次曝光时被漂白造成影像反转;卤化银颗粒上必须同时有足够的表面敏化中心和足够的内部敏化中心,两者应相匹配。利用这个机理可以解释许多有关Sabatier效应的实验现象。

关键词: 核壳乳剂, 潜影分布, Sabatier效应

Abstract: Based on the study of the latent image distribution and Sabatier effect of iodide uniformly distributed emulsions and core-shell emulsions, a machanism of Sabatier effect was proposed.The surface latent image centers produced during the first exposure became hole trapping centers after adsorbing anions of developer and were bleached during the second exposure, so that a reverse image was formed.It was indicated that for a good Sabatier emulsion it should contain enough surface sensitivity centers as well as enough internal sensitivity centers, and they should be well matched.This machanism can be used to explain several results of Sabatier effect.

Key words: core-shell emulsion, latent image distribution, Sabatier effect