Label-Free Detection of Chondroitin Sulphate Proteoglycan 4 by a Polyaniline/Graphene Nanocomposite Functionalized Impedimetric Immunosensor

Figure 3

Analysis of cell culture media by impedimetric immunosensor. (a) Impedance spectra of (A) CSPG4 specific mAbD2.8.5 immobilized electrode, (B) CSPG4 mAbD2.8.5-coated electrode reacted with culture medium of M14 cells, and (C) CSPG4 mAbD2.8.5-coated electrode reacted with culture medium of M14/CSPG4 cells. (b) Histogram of normalized impedance signal changes.

(a)

(b)