Electrospinning-Based High-Sensitive Pvdf-Trfe Nanofibre Sensor With Sensitivity Dependence on Pore Diameter

Electrospinning-based nanofibre sensor of polyvinylidene fluoride-co-trifluoroethylene (PVDF-TrFE) was fabricated with versatile pore diameter, shape and size for assessment to be used in a wide range of biomedical applications.In this study, nanofibre film of PVDF-TrFE copolymers along with a sandwich of aluminium and copper acts as an electrode of the sensor, exhibiting strong acoustic to electricity conversion ability within the audible frequency range 20 Hz-20 kHz.Sensitivity of the sensor was observed to effectively change from 0.5 to 12 VPa -1 with change in pore diameter from 220 to 280 nm of the nanofibres.Besides, cardiac response within the frequency range 0.05-120 Hz at 0 dB was detected using this sensor with a sensitivity of 10 mV.The fabricated polymer sensor of 250 nm fibre pore diameter exhibited sensitivity as high as 10 VPa -1 at 120 Hz incident frequency of audible sound under a specially arranged sensing assembly, where convergent sound directly impacted on the nanofibre layer.The high-sensitive materials can make a significant contribution in cardiac and audiometric device fabrication.