One-Step Electrosynthesis of Graphene Oxide-Doped Polypyrrole Nanocomposite as a Nanointerface for Electrochemical Impedance Detection of Cell Adhesion and Proliferation Using Two Approaches

Figure 7

Biocompatibility characterization. Phase contract microscopy images of A549 cells attached to (a) GO/PPy film and (b) PPy film for 2 h after the inoculation of cells. 3D laser microscope images of A549 cells spread on (c) GO/PPy film and (d) PPy film for 12 h after seeding. (e) Relative cell growth rate of A549 cells cultured on polystyrene, GO/PPy, PPy, and bare ITO as tested by the WST-8 assay. The absorbance of the WST-8 solution by polystyrene for 24 h after cell seeding was used as a control. The value represents mean ± standard deviation (). and , versus polystyrene.

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