Figure 5
From: Antibacterial cellulose paper made with silver-coated gold nanoparticles

The antibacterial effects of different Au and Au-Ag NPs on E. coli. The (a) inhibition ratios of the bacterial growth and (b) typical photographs of the bacterial colonies formed after the Au, Au-Ag1000/1, and Au-Ag100/1 NP-cellulose paper samples had reacted with E. coli for 1, 8, and 24 h (n = 3).