Science Advances

Supplementary Materials

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  • fig. S1. Optical images of ImClO4 molecular crystals synthesized by spin coating an ImClO4 solution (700 mg/ml) on an ITO-prepatterned glass substrate at 3000 rpm, at different magnifications.
  • fig. S2. Optical images of ImClO4 molecular crystals synthesized by drop-casting ImClO4 solution on ITO glass substrate at a concentration of 700 mg/ml, at different magnifications.
  • fig. S3. Optical images of ImClO4 molecular films synthesized by IP-LP growth on ITO glass substrate at an intermediate evaporation rate, with a water partial pressure of 13.5%; the film grows on the surface of the solution, inducing unidirectional growth.
  • fig. S4. Optical images of ImClO4 molecular films synthesized by IP-LP growth on ITO glass substrate at a slow evaporation rate, with a water partial pressure of 45.1%, at different magnifications.
  • fig. S5. Morphology and elements distribution analysis of ImClO4 molecular films at a water partial pressure of 45.1%.
  • fig. S6. Morphology and elements distribution analysis of ImClO4 molecular films at a water partial pressure of 35.5%.
  • fig. S7. Experimental and simulated x-ray diffraction patterns of ImClO4 film on ITO substrate.
  • fig. S8. Piezoelectric voltage response of the Ag/ImClO4/Ag sandwiches to external stresses from 2.4, 4.1, and 6.7 to 9.8N, which generate the proportional voltages shown in the right-hand side.
  • fig. S9. Evolution of the piezoelectric current outputs at different applied stresses from 2.4, 4.1, and 6.7 to 9.8 N on the ImClO4 film.
  • fig. S10. Evolution of the piezoelectric voltage outputs with decreasing magnitude of the applied stress on the ImClO4 film from 2.4, 4.1, and 6.7 to 9.8 N.
  • fig. S11. Piezoelectric voltage as a function of the frequency resulting from applied forces, F0sin(νt) (F0 = 4.5 N at 0.40, 0.20, and 0.10 Hz).

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