To progress the proficiency and broaden action bandwidth of vibration energy harvesters, this paper presents a cantilever piezoelectric-magnetostrictive bistable hybrid harvester with dynamic magnifier. The energy-harvesting system comprises two degrees freedom electrical freedom. It consists composite beam made three layers, in which magnetostrictive piezoelectric layers are attached to top bo...

This paper presents the design and fabrication of a novel piezoelectric actuator for a gas micro pump with check valve having the advantages of miniature size, light weight and low power consumption. The micro pump is designed to have eight major components, namely a stainless steel upper cover layer, a piezoelectric actuator, a stainless steel diaphragm, a PDMS chamber layer, two stainless ste...

The design of a rotary ultrasonic motor for space applications is considered. First the working principle of such device is examined. The dynamics of the stator and the rotor is then studied by means of modelling approaches proposed in tW recent literature. A special attention is devoted to geometry of the piezoelectric actuating layers and the relevant electrodes pattern. A preliminary design ...

We present the fabrication of parylene-based hollow nanomechanical resonators, following a simple two step fabrication process with a thermal budget of less than 120°C. This process is ideal for fast prototyping and compatible with most materials used in microand nano-fabrication. In particular, the example we present here shows a hybrid structure with silicon nitride and parylene, but we have ...

Nowadays, atomic force microscope is considered as a useful tool in the determination of intermolecular forces and surface topography with the resolution of nanometers. In this kind of microscope, micro cantilever is considered as the heart of the microscope and is used as a measuring tool.  This paper is aimed towards investigating the behavior of a piezoelectric micro cantilever with a triang...

The output of a piezoelectric nanogenerator based on ZnO nanowire is largely affected by the shape of nanowire. In order to obtain mechanically stable nanogenerator with high performance, the investigation of mechanical and electrical characteristics related to the nanowires and materials used in nanogenerators are of great interest and significance. This paper presents the various behavior of ...

A tugh resolution (2/am) acousUc step-wave probing techmques has been developed to investigate the lnhomogeneous dtstnbutlon of the piezoelectric response of incompletely corona poled 85/am ttuck PVDF films We observe persistent polanzaUon zones or layers of 20-40/am width within the films wtuch are electrostatlcally compensated by charge accumulaUon at the polanzaUon zone boundaries The zone d...

We present patterning of GaN layers by laser interference lithography to create threedimensional structures on a submicrometer scale. These structures exhibit surfaces comprised of semipolar crystal facets with reduced piezoelectric fields. The small dimensions of these 3D structures allow embedding. The resulting planarized surfaces considerably ease subsequent device processing. Structural ch...

The performance of smart structures depends on the electromechanical behaviour of piezoelectric actuators and the bonding condition along the interface, which connects the actuators and the host structures. This paper provides a theoretical study of the effect of partially debonded adhesive layers on the coupled electromechanical behaviour of piezoelectric actuators subjected to high-frequency ...