Fig. 3. (a) SEM image of the vias and traces and (b) reference electrodes after 3D printing showing a reduced design to device offset of approximately 50 μm. The diameter of the dotted circles is 450 μm. The length and width of the dotted reference electrode is 450 μm wide and 1250 μm long. The width of the micro troughs for subsequent ink casting is measured as 240 μm showing a design to device offset of ∼10 μm. Scale bars in figures corresponds to 500 μm.
