Fig. 6.

Cytotoxicity following a dose response of hexagonal boron nitride (hBN; A) and molybdenum disulfide (MoS₂; B) in human telomerase reverse transcriptase-immortalized corneal epithelial (hTCEpi) cells. Percent viability was measured by Calcein AM assay. Cytotoxicity of MoS₂ was induced from doses of 2.5 to 50 μg/mL, and cytotoxicity of hBN was induced from doses 4 to 40 μg/mL. Saponin and citrate-capped gold nanoparticles (AuNP) were used as a positive and negative control for cytotoxicity, respectively. An unpaired student’s t-test with Welch’s correction was performed to compare each treated group to the media control group: *P < 0.05, **P < 0.01, ***p < 0.001, and ****P < 0.0001. N = 3 (hBN) or 4 (MoS₂) for all groups of that analysis. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)