Fig. 4From: Ultra-Sensitive Strain Sensor Based on Flexible Poly(vinylidene fluoride) Piezoelectric FilmThe hold-and-release output response from the pressures of a 75.1 kPa, b 58.2 kPa, c 67.8 kPa, d 81.9 kPa, e 98.1 kPa, and f 153.6 kPa; the inset shows the hold-and-release output response obtained from bare PVDF filmBack to article page