Enhanced antimicrobial activity of silver/polyrhodanine composite decorated silica nanoparticle

silver nanoparticle;polyrhodanine;nanocomposite;oxidation polymerization;bactericidal;660

공과대학 화학생물공학부(에너지환경 화학융합기술전공) ;

University:서울대학교 대학원

关键词: silver nanoparticle;    polyrhodanine;    nanocomposite;    oxidation polymerization;    bactericidal;    660;   

Others  :  http://s-space.snu.ac.kr/bitstream/10371/129463/1/000000008512.pdf

美国|英语

来源: Seoul National University Open Repository

【 摘 要 】

This work describes the novel solution system synthesis of silver/polyrhodanine composite decorated silica NPs.Polymerization of polyrhodanine proceeded preferentially on the surface of the silica NPs where the Ag+ ion was located. During the polymerization, the embedded Ag+ ions reduced to metallic Ag NPs and consequentially silver/polyrhodanine composite NPs (ca. 7 nm) were formed on the surface of the silica nanoparticle. The existence of silver NPs and polyrhodanine on the silica NPs were verified through microscopic observation, FTIR, UV-vis, and XRS analysis. The composite nanoparticle decorated silica NPs exhibited excellent antimicrobial activities against Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus. Importantly, the synthesized composite NPs retained antimicrobial activity under silver depletion condition due to the contact-active biocidal polyrhodanine. Therefore, it can be anticipated that the silver/polyrhodanine composite decorated silica NPs have potential for use as a long-term antimicrobial agent.