Fig. 4.

PAni hydrogel as high-performance 3D nanostructured electrode for glucose enzyme sensor. (A) Amperometric response of the GOx-PAni hydrogel-based enzymatic biosensor to successive addition of glucose in PBS (0.1 M, pH 5.5); the concentration of glucose was increased 0.1 mM for each time (increased 0.2 mM at 1,180 s). Inset shows a magnification of the seventh additions of glucose. (B) The corresponding calibration plot showing nearly linear amperometric response vs. glucose concentration.