Poled PVDF piezoelectric film without electrode. Thickness of 10 um, other thickness available upon request, high d31 and d33 >20 pC/N.
For piezo sensors. loudspeakers.
Also for electroactive polymer EAP actuator, soft actuator, robotics
Uniaxially oriented with high d31 (but almost no d32).
Berkeley and Tsinghua in "Insect-scale fast moving and ultrarobust soft robot", Science Robotics
Bending actuator https://www.youtube.com/watch?v=G7-wSv4pUwI