Figure 5From: Enhancement of the killing effect of low-temperature plasma on Streptococcus mutans by combined treatment with gold nanoparticles Transmission electron microscopy images of S. mutans treated with low-temperature plasma and gNPs (×20,000). (A) Control cells without any treatment. (B) S. mutans cells treated with plasma only. (C) S. mutans cells treated with gNPs only. (D) Morphological features of S. mutans cells after combined treatment with plasma and gNPs.Back to article page