2.3. SEM analysis of glucose biosensors
Particle morphologies were observed through scanning electron microscopy (SEM; JSM-7900F, JEOL, Japan). To obtain SEM images, all the samples were printed in the same manner (electrode printing described in Section 2.1) and coated with Nafion, Nafion/MWCNT, and Nafion/MWCNT/GOx solutions. Subsequently, the samples were dried at room temperature and then measurements were performed.