Fig. 4From: Antibiofilm activity of ultra-small gold nanoclusters against Fusobacterium nucleatum in dental plaque biofilmsAntibiofilm mechanism of AuNCs. A Live/dead fluorescent staining of F. nucleatum biofilm treated with AuNCs. B Morphological and structural changes of F. nucleatum biofilm treated with AuNCs visualized by SEM. C Testing the biofilm penetrability of AuNCs and image of bacterial colony forming units from the lower chamber. The concentration of AuNCs was 0.4 mMBack to article page