Title of article :
Preparation of graphene oxide–silver nanoparticle nanohybrids with highly antibacterial capability
Author/Authors :
Zhu، نويسنده , , Zhijun and Su، نويسنده , , Min and Ma، نويسنده , , Lan-lan and Ma، نويسنده , , Lina and Liu، نويسنده , , Dianjun and Wang، نويسنده , , Zhenxin، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2013
Pages :
7
From page :
449
To page :
455
Abstract :
A simple method based on electrostatic interactions was utilized to assemble silver nanoparticles (AgNPs) to graphene oxide (GO) sheets. This method allows conjugation of AgNPs with desired morphologies (densities, sizes and shapes) onto GO. In this process, poly(diallyldimethylammonium chloride) (PDDA) was introduced as an adhesive agent. The as-prepared graphene oxide–AgNPs composites (GO–AgNPs) have enhanced colloid stability and photo-stability than that of AgNPs. After conjugating to GO sheets, the antibacterial activities of AgNPs against Gram negative (G−) bacterial strain (Escherichia coli, E. coli) and Gram positive (G+) bacterial strain (Bacillus subtilis, B. subtilis) have been improved significantly. The antibacterial activity of GO–AgNPs is dependent on the size of AgNPs, i.e. the small AgNPs modified GO sheets show more effective antibacterial capability than that of large AgNPs modified GO sheets. Compared with AgNPs, the enhanced antibacterial activity of GO–AgNPs might not only be due to high stability of AgNPs anchored on GO sheets, but also the positive charged surface of hybrids which increases the electrostatic interaction of bacterial cell membrane with nanohybrids.
Keywords :
silver nanoparticle , PDDA , Enhanced antibacterial capability , High stability , Graphene oxide
Journal title :
Talanta
Serial Year :
2013
Journal title :
Talanta
Record number :
1669513
Link To Document :
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