Electrochemical Analysis of the Redox State of Silver Contained in Antibacterial Material

• 作者: Hajime Hamashima Yoshihiro Inoue
• 来源期刊: 生物材料与纳米技术(英文)
• 学科: 化学
• 关键词: SILVER ANTIBACTERIAL ACTIVITY ELECTROCHEMICAL ANALYSIS
• 年，卷（期）: 2012,（2）
• 页码范围: 136-139
• 页数: 4页
• 分类号: O6

摘要

Introduction of silver into some inorganic material causes the resulting mixture to have antibacterial activity. Here, we investigated the role of silver in the bactericidal activity of silver-loaded zeolite, by measuring the effects of silver-loaded zeolite on Escherichia coli cell viability under conditions in which the oxidation state of the silver was controlled electrochemically. Bactericidal activity was observed when the sweeping voltage between 0 and 0.7 V was applied to the silver electrode. When nitrogen gas bubbling or reactive oxygen scavengers were added to the experimental system, bactericidal activity decreased. These results indicated that the redox cycle, Ag0 Ag+, caused the dissolved oxygen to form reactive oxygen species.