Molecular Ferroelectric Based Biocompatible Flexible Piezoelectric Pressure Sensor

This letter presents a biocompatible flexible pressure sensor fabricated by employing a biocompatible organic ferroelectric, namely single protonated 1,4-diazabicyclo[2.2.2]octane fluoroborate ([Hdabco]BF
₄
) embedded in poly(vinylidene fluoride) (PVDF) polymer. The presented device generated an output voltage of 6.5 V, which is more than twice the voltage generated by a pristine polymeric device. When used as a pressure sensor, the device showed a high sensitivity of 0.4 V/kPa and a linear response for external compressive pressures that ranged between 1.6 and 12.8 kPa. These results demonstrate that [Hdabco]BF
₄
@ PVDF composite is a promising material for applications such as wearable electronics where biocompatible and self-powered sensors are much needed.