Fig. 6: Piezoelectric electrical performance and mechanical stability of β-glycine nanocrystalline films. | Nature Communications

Fig. 6: Piezoelectric electrical performance and mechanical stability of β-glycine nanocrystalline films.

From: Active self-assembly of piezoelectric biomolecular films via synergistic nanoconfinement and in-situ poling

Fig. 6

a Schematic of the piezoelectric device measurement set-up. The bottom right image is the photography of a real device. Scale bar: 1.5 cm. b Open-circuit voltage and c short-circuit current responses of the piezoelectric device of the as-prepared films under 1.5 MPa compressive pressure with 30 Hz frequency. d Linear dependence of the maximum open-circuit voltage output of the piezoelectric devices on the increased external forces. Error bar denotes the standard deviation. e Dependence of the power output of the piezoelectric device on the resistance of the external load under 1.0 MPa compressive pressure. f The charging curves of the 4.7 µF and 10 µF capacitor. g Voltage output signals during 24,000 cycles under 1.5 MPa compressive pressure. h XRD spectra of the films before and after durability tests of 24,000 compressing cycles. The standard XRD spectra of β-glycine are shown at the bottom of the figure. i Optical image showing three LEDs lit up by an individual piezoelectric device through finger tapping with a frequency of 0.5–1 Hz.

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