In this paper, strain transfer efficiencies from a single crystalline piezoelectric lead magnesium niobate-lead titanate substrate to a GaAs semiconductor membrane bonded on top are investigated using state-of-the-art x-ray diffraction (XRD) techniques and finite-element-method (FEM) simulations. Two different bonding techniques are studied, namely, gold-thermo-compression and polymer-based SU8...

Unusually large spontaneous and piezoelectric fields in the III-V nitrides have led to the making of an entirely new class of two-dimensional electron gas. Fluctuation from a perfectly periodic binary structure in highly polar semiconductor alloys present the same physical situation as a random distribution of microscopic dipoles. The excess dipole distribution in the barrier layers is evaluate...

In the present work a new concept for a shear horizontal ultrasonic wave transducer based on piezoelectric fibre patch (PFP) technology is presented. In this type of sensor two separate fibre layers with opposite polarization are tilted by ±45° relative to the electrode fingers. Numerical 3-D simulations based on the Elastodynamic Finite Integration Technique (EFIT) show that with this new PFP ...

A novel surface micromachining process is reported for aluminum nitride (AlN) thin films to fabricate piezoelectric unimorph suspension devices for micro actuator applications. Wet anisotropic etching of AlN thin film is used with a Cr metal mask layer in the microfabrication process. Tetra methyl ammonium hydroxide (TMAH) of 25 wt.% solution is used as an etching solution for the AlN thin film...

This paper studies stability of homogeneous beams with piezoelectric layers subjected to axial load that is simply supported at both ends lies on a continuous elastic foundation. The displacement field of beam is assumed based on first order shear deformation beam theory. Applying the Hamilton's principle, the governing equation is established. The influences of applied voltage, dimensionless g...

Ferroelectric material supports both pyroand piezoelectric effects that can be used for sensing pressures on large, bended surfaces. We present PyzoFlex®, a pressure-sensing input device that is based on a ferroelectric material (PVDF:TrFE). It is constructed by a sandwich structure of four layers that can easily be printed on any substrate. The PyzoFlex® foil is sensitive to pressureand temper...

This paper describes the design, fabrication and characterization of Polyvinylidene Fluoride (PVDF) based piezoelectric energy harvester that scavenges energy from the movement of human limbs. It investigates the effect of a piezolaminated curvilinear shell structure on the power density of a wearable energy harvester through Finite Element Method (FEM) and experimental results. Curvilinear She...

A sensor for the simple and sensitive measurement of hydrogen peroxide has been developed which is based on screen printed electrodes (SPEs) modified with Prussian blue nanoparticles (PBNPs) deposited using piezoelectric inkjet printing. PBNP-modified SPEs were characterized using physical and electrochemical techniques to optimize the PBNP layer thickness and electroanalytical conditions for o...