Research / 2021 / Article / Fig 4

Research Article

Thermoresponsive Lignin-Reinforced Poly(Ionic Liquid) Hydrogel Wireless Strain Sensor

Figure 4

Poly(ionic liquid) hydrogel strain sensor for flexible touch panel and human movement detection. (a) Schematic illustration for the flexible touch panel. (b–d) Characteristic signal peaks for writing different letters. (e) Flexible touch panel array for braille input system. (f) Electromechanical response of typing different letters by the braille input system. (g) Relative current variations of the sensor for mouth opening. (h) Relative current variations of the sensor for blowing.