Fig. 2

In vitro cytotoxicity. a Hemolyticrate of red blood cells incubated with chitosan/Fe₃O₄@IL microcapsules at various concentrations for 3 h, using PBS (−) and deionized water (+) as negative and positive controls, respectively. Inset: the photo images for direct observation of hemolysis for microcapsules. b Viabilities of HepG2 cells incubated with chitosan/Fe₃O₄@IL microcapsules with different concentrations for 24 h