Fig. 4From: Halloysite Nanotubes Supported Ag and ZnO Nanoparticles with Synergistically Enhanced Antibacterial Activity a Photographs of the bacterial culture plates, b the colony forming units, and c antibacterial stability of control, ZnO, HNTs (inset), ZnO/HNTs, and Ag-ZnO/HNTs (1st, 2nd, 3rd, 4th corresponding to the reused time of nanocomposites, respectively)Back to article page