Highly Stretchable, Elastic, and Sensitive MXene-Based Hydrogel for Flexible Strain and Pressure Sensors
The electromechanical performances of the hydrogel-based strain sensor. (a) as a function of applied strains within 40% with different contents of MXene (0, 0.5, 1, 2, and 4 wt%). (b) as a function of applied strains up to 120% and the corresponding GF. (c) Electromechanical hysteresis of the hydrogel sensor. (d) under cyclic stretching-releasing at strains of 25, 50, and 100%, respectively. (e) Cyclic stretching-releasing with different stretch frequencies. (f) Response time and release time of the hydrogel sensor. (g) The durability test of the hydrogel sensor. (h) Schematic illustration of the mechanism of the electromechanical responses of the hydrogel sensor.