Ultrathin Free-Standing Poled PVDF piezoelectric film without electrode. Thickness of 7 um, other thickness available upon request, high d31 >28 pC/N and d33 >15 pC/N.
Uniaxially oriented with high d31 (but almost no d32).
Note: it is difficult to use d33 meter to accurately measure thin polymer film. The measured value is usually lower than actual performance for thinner film. It is more appropriate to use d31 to characterize thin film <40 um.
For piezo actuators sensors. loudspeakers.
Also for electroactive polymer EAP actuator, soft actuator, robotics
Berkeley and Tsinghua in "Insect-scale fast moving and ultrarobust soft robot", Science Robotics
Bending actuator https://www.youtube.com/watch?v=G7-wSv4pUwI