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Surface morphology characterized by scanning electron microscopy (SEM) of PVDF-coated polycaprolactone (PCL)-tricalcium phosphate (TCP) films fabricated at a relative humidity (RH) of (a) 10%, (b) 16%, and (c) 56%. (d) Representative ferroelectric polarization–electric field (P–E) hysteresis measured under an applied field up to 50 kV/cm. (e) FTIR spectra of PVDF-coated PCL-TCP films.
