Antibacterial activity of silver nanoparticles against E. coli synthesized at different Ag:copolymer ratios (10:1, 20:1 and 30:1). First row: changes in antibacterial activity on
increasing precursor ratio. Second row: the effect of coating with silver nanoparticle solution on antibacterial activity as well as the laundry performance of antibacterial activity
for 30:1 ratio against E. coli.