3.2. CA response of the 3D-printed CP electrode
The optimized Nafion/MWCNT/GOx coating solution was applied to the CP electrode. CA measurements were performed at +0.6 V (where the oxidation current starts) for coated and dried electrodes. The CA graph at +0.6 V for different glucose concentrations is depicted in Fig. 3A. Glucose was measurable over a wide range of concentrations (1–100 mM), including 2–40 mM, which is the general blood sugar level. Successful measurements over the range of 1–100 mM indicated that measurements around 1 mM can be performed as well, which is the glucose level of body fluids such as sweat and saliva (38).