Fig. 4: 3D printed dry electrocardiogram (ECG) Electrode with conductive serpentines.
From: 3D printed leech-inspired origami dry electrodes for electrophysiology sensing robots
Schematics of a 3D printing process of serpentine electrodes on the non-auxetic origami surface, and b the folding and unfolding behaviors of non-auxetic origami. Gap distance, d, is wider once the origami is compressed. The direction of force, f, during the folding is highlighted with red arrows. c Relation of gap distance with height changes of z-direction. d Optical microscopic images of the 3D printed electrodes with the different layered number, n. e The different strain values from 0 to 1.8 with the sample of n = 1 ~ 3 (R0 = 3.46 × 10−1 Ω). f The normalized impedance of the 3D printed serpentine electrodes with different printing layers.
