PVDF film with HA, PHA, AgNO₃ fillers for biocompatible piezoelectric sensors

Pvdf and Pzt Piezoelectric Wafer Active Sensors for Structural Health Monitoring

Piezoelectric wafer active sensors (PWAS) used in structural health monitoring (SHM) applications are able to detect structural damage using Lamb waves. PWAS are small, lightweight, unobtrusive and inexpensive. PWAS achieve direct transduction between electric and elastic wave energies. PWAS are essential elements in the Lamb-wave SHM with pitch-catch, pulse-echo, phased array system and electr...

Three-Scale Structure Analysis Code and Thin Film Generation of a New Biocompatible Piezoelectric Material MgSiO3

Ultra high sensitivity, wideband Fabry Perot ultrasound sensors as an alternative to piezoelectric PVDF transducers for biomedical photoacoustic detection

A high sensitivity, wideband ultrasound sensor based on a high finesse Fabry-Perot (FP) polymer film interferometer has been demonstrated with a bandwidth of 20 MHz and a 50μm diameter active area. Used in conjunction with a balanced photodetector to enable the use of a high intensity interrogating light beam of up to 36mW, the sensor system provided a noise equivalent pressure (NEP) of 0.35kPa...

Metal piezoelectric semiconductor field effect transistors for piezoelectric strain sensors

In this letter, we examine the potential of a functional device that can have good transistor and stress sensor properties. The device examined is based on the use of a thin oxide with high piezoelectric coefficients under the gate region. Channel charge and current are controlled by gate voltage or by stress. We examine the performance of two classes of heterostructures that are important semi...

Design optimization of PVDF-based piezoelectric energy harvesters

Energy harvesting is a promising technology that powers the electronic devices via scavenging the ambient energy. Piezoelectric energy harvesters have attracted considerable interest for their high conversion efficiency and easy fabrication in minimized sensors and transducers. To improve the output capability of energy harvesters, properties of piezoelectric materials is an influential factor,...