Figure 9From: Chemical and magnetic functionalization of graphene oxide as a route to enhance its biocompatibilityRelative viability of fibroblast cell line L929 exposed to B-GO and B-GO-Fe 3 O 4 hybrid . The cell viability is presented as percentage of the mean value. Bars represent standard deviation, and the symbol asterisk indicates statistically significant difference (p < 0.05).Back to article page