fig4

Figure 4. Pressure-sensitive voltage response. (A) Tapping force-dependent voltage response of LF-TENG; (B) Pressure sensitivity of LF-TENG sensors in range-I (0.0245 to 1.23 kPa) and range-II (2.45 to 23.3 kPa); (C) Finger tapping response of PDMS-encapsulated E-TENG at light, medium, and heavy tapping force; (D) Comparison of LF-TENG pressure sensitivity with other TENG-based pressure sensors^{[25,26,31,40-50]}. E-TENG: Encapsulated-triboelectric nanogenerator; LF-TENG: laminated flexible-triboelectric nanogenerator; PDMS: polydimethylsiloxane.