Formation of colloidal silver in the presence of a nonionic surfactant, Surfynol 465

被引:10
作者
Sato, S
Asai, N
Yonese, M
机构
[1] Faculty of Pharmaceutical Sciences, Nagoya City University, Mizuho-ku, Nagoya 467, Tanabe-dori
关键词
colloidal silver; nonionic surfactant; Surfynol; 465; UV-VIS spectrum; TEM;
D O I
10.1007/BF00654748
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The formation of colloidal silver in the presence of a nonionic surfactant, Surfynol 465, was studied at various temperatures. By simply mixing equal volumes of AgClO4 aq. (1-10 mmol kg(-1)) and Surfynol 465 aq., the colloidal silver was formed. The colloidal solution had well over ten times the amount of fine silver particles in the solution formed by the ordinary methods. The first factor to form the colloidal silver without aggregation was the molar ratio of Surfynol 465 to AgClO4, and the optimum ratio increased with increasing the concentration of AgClO4 or the temperature. In the fraction of colloidal silver collected through the gel filtration, Surfynol 465 was also found in the micellar state. From these results, it was suggested that Surfynol 465 was a protecting agent of colloidal silver as well as a reducing agent of AgClO4 in the similar manner to the case of colloidal gold.
引用
收藏
页码:889 / 893
页数:5
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