Infrared-Mediated Drug Elution Activity of Gold Nanorod-Grafted TiO₂ Nanotubes

Figure 6

(a) Photographs of antibacterial agar diffusion test by using Streptococcus mutans and (b) the results of zone diameter of dead Streptococcus mutans on the conditions of negative control, positive control, GNR-grafted TiO₂ nanotubes without IR light irradiation (designated GNT) and with IR light irradiation for 1 min (designated GNT + IR). * and ** denote significance between groups (𝑃<0.05).

(a)

(b)