One-step in situ assembly of size-controlled silver nanoparticles on polyphenol-grafted collagen fiber with enhanced antibacterial properties

This paper introduced a facile method for the one-step in situ fabrication of size-controlled AgNPs on collagen fiber (CF) at room-temperature. Epigallocatechin-3-gallate (EGCG), a typical plant polyphenol, was grafted onto the CF surface to serve as a reducing-cum-stabilizing agent, so that the AgN...

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Bibliographic Details
Published in:New journal of chemistry 2011, Vol.35 (12), p.2902-2909
Main Authors: Wu, Hao, He, Li, Gao, Mingming, Gao, Siying, Liao, Xuepin, Shi, Bi
Format: Article
Language:English
Subjects:
Escherichia coli
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Summary:This paper introduced a facile method for the one-step in situ fabrication of size-controlled AgNPs on collagen fiber (CF) at room-temperature. Epigallocatechin-3-gallate (EGCG), a typical plant polyphenol, was grafted onto the CF surface to serve as a reducing-cum-stabilizing agent, so that the AgNPs were generated on the CF surface without extra chemical reductant or physical treatments. The formation of AgNPs was verified by UV-vis DRS, FT-IR, XRD, XPS, TEM, EDX, and HRTEM measurements. Dispersed AgNPs with small particle size were successfully produced, and the mean particle size of AgNPs could be effectively controlled in the range 22-5 nm simply by varying the grafting degree of EGCG on the CF surface. As-prepared Ag-EGCG-CF materials were subjected to antibacterial assay using Gram-negative bacteria, Escherichia coli (E. coli), as a bacterium model. It was found that Ag-EGCG-CF exhibited excellent antibacterial activity and good durable biocidal utility for repeated use, which was highly dependent on the particle size of AgNPs and the grafting degree of EGCG.
ISSN:1144-0546
1369-9261
DOI:10.1039/c1nj20674e