Nano silver

based on the nanoscience and nanotechnology

exhibits excellent antibacterial ability due to the quantum effect and size effect. In this work

the plant-mediated synthesis of silver nanoparticles (AgNPs) was reported from four plants

including Scutellaria baicalensis

Syzygium aromaticum

Syzygium samarangense and Cinnamomum camphora. The as-synthesized AgNPs were characterized by UV-Vis

TEM and XRD techniques. The results indicated that the AgNPs tended to be smaller with the increase of biomass concentration or NaOH adding amounts. SEM images verified that the AgNPs can be loaded onto cotton fabric through impregnation

and the optimal conditions were time of 30 h

temperature of 55℃ and liquor ratio of 1:25. Furthermore

the effects of AgNPs size and plant species on the antibacterial ability of the resulting Ag-coated fabrics were investigated

respectively. AgNPs loaded on the fabrics with smaller size displaied superior antibacterial activity against Escherichia coli. Moreover

Ag-coated fabrics prepared from Scutellaria baicalensis and Syzygium aromaticum extracts

which possessed own antibacterial ability

showed the cooperative antibacterial effect between biomass and nano-silver. The as-prepared fabric by the extract of Scutellaria baicalensis exhibited the best antibacterial ability with high inhibition ratio against various bacteria such as Staphylococcus aureus and Escherichia coli.