Particle Size-Dependent Antibacterial Activity and Murine Cell Cytotoxicity Induced by Graphene Oxide Nanomaterials

Figure 2

Antibacterial activities of GQD, SGO, and LGO. Representative photographs of E. coli ((a) E. coli DH5α; (b) E. coli ATCC-25922) colonies on LB-Agar culture plates after 0–100 μg/mL LGO treatment for 2 h. Our viability assay for E. coli consists of standard plate counting after 0–150 μg/mL GQD, SGO, and LGO treatment for 2 h. The colonies on plates in different groups were compared with an untreated control (considered to be 100% viable). The data are presented as mean ± SD values derived from three independent experiments (; ).

(a) E. coli DH5α

(b) E. coli ATCC25922