Research / 2020 / Article / Fig 3

Research Article

3D Printed Ultrastretchable, Hyper-Antifreezing Conductive Hydrogel for Sensitive Motion and Electrophysiological Signal Monitoring

Figure 3

Performance of a flexible and wearable sensor made of the printed hydrogel. (a) Schematic illustration of the 3D strain sensor assembled from the conductive hydrogel: (i) detection of the muscle movements of the throat, (ii) the sensor used to monitor joint motions, (iii) the composition of the hydrogel sensor, and (iv) the underlying mechanism for the sensor. (b) The relative current changes versus time as a person pronounces the words “hydrogel, hydrogel, conductive hydrogel” for three times. (c) The signal of the sensor with different working voltages for detecting finger bending. (d) The signals of the sensor working at different temperatures by probing the bending of the finger. (e) The stability of the hydrogel sensor with 1 million cycles and the conductivity of the sensor before and after 1 million cycles were measured, and signals of finger motions before and after 1 million cycles were inserted.