fig2

Figure 2. (A) Schematic of the sensor layers; (B) Photograph of the sensor of human skin with a close-up of the fingers; (C) Photograph of the sensor mechanism with and without strain; (D) Sensor capacitance as a function of strain; (E) Capacitance changes of the sensor during 100 stretching cycles; (F) Resonant frequency sweeps at different strains. The resonant frequency increases with increasing sensor strain; (G) Resonant frequency at low strain values; (H) Resonant frequency at high strain values.