Calcium Nitrate Tetra-Hydrate-Doped Polyvinylidene Fluoride Thin Films as Potential Devices for Pressure Sensors.

Calcium nitrate tetra-hydrate [Ca(NO₃)₂·4H₂O]-doped polyvinylidene fluoride (PVDF) thin films were successfully prepared by mixing 0.2-g-calcium nitrate into a PVDF solution under ultrasonification. The mixed solution was electrostatically spray coated onto aluminum foil substrates and then heat treated at 120 °C for 60 min in air.