Antibacterial surfaces through dopamine functionalization and silver nanoparticle immobilization

Immobilization of silver nanoparticles on the dopamine functionalized polyimide (PI) films was carried out by photo-induced silver ion-reduction under atmosphere conditions. The dopamine has been successfully deposited on the PI surface in mild aqueous environments. The effects of pH, dopamine conce...

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Bibliographic Details
Published in:Materials chemistry and physics 2010-06, Vol.121 (3), p.534-540
Main Authors: Liao, Yuan, Wang, Yaqin, Feng, Xiaoxia, Wang, Wencai, Xu, Fujian, Zhang, Liqun
Format: Article
Language:English
Subjects:
Antibactericidal
Bacteria
Contact
Deposition
Dopamine
Nanoparticle
Nanostructure
Polyimide
Polyimide resins
Scanning electron microscopy
Silver
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Summary:Immobilization of silver nanoparticles on the dopamine functionalized polyimide (PI) films was carried out by photo-induced silver ion-reduction under atmosphere conditions. The dopamine has been successfully deposited on the PI surface in mild aqueous environments. The effects of pH, dopamine concentration and reaction time on the dopamine polymerization were investigated. The water contact angles of the poly(dopamine) functionalized PI films reduced remarkably in comparison with that of the pristine PI film. The chemical composition and structure of the UV-induced deposited-silver on the modified PI films were characterized by X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD). The topography of the modified PI films was investigated by scanning electron microscope (SEM). The deposited poly(dopamine) layer acted as binding sites for the silver ions. The silver-plated PI films showed good antibacterial activity due to that biofilm formation was inhibited on the polymeric surfaces in contact with bacteria.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2010.02.019