A thin film lead zirconate titanate Pb(Zr,Ti)O3 (PZT), power generating device is developed. It is designed to resonate at specific vibrational frequencies from an ambient, vibrational energy source, thereby creating electrical energy via the piezoelectric effect. The energy harvesting device uses the piezoelectric d33 mode and is fabricated with three mask steps. Our cantilever device was desi...

Sm-doped BiFeO3 thin films were fabricated on platinized silicon substrates via a sol-gel method. Sm contents and thicknesses were varied in a wide range to investigate their effects on the phase structure and piezoelectricity. X-ray diffraction and Raman spectroscopy experiments revealed a rhombohedral to orthorhombic phase transition and the co-existence of both phases in a certain compositio...

By Timothy Michael Sullivan, M.S. Washington State University August 2004 Chair: David F. Bahr The transverse piezoelectric properties of thin piezoelectric films were measured using the rectangular membrane method (RMM) developed at Washington State University. This method was compared with other methods from literature performed at WSU. The measured properties were used to evaluate piezoelect...

・ Abstract – Characteristics of Zinc oxide (ZnO) piezoelectric thin films have been investigated for thin film bulk acoustic wave (BAW) resonators with relationship to bottom electrodes. A Metal/ZnO/Metal/SiO2 membrane structure, which has secondary harmonics, was adopted for the BAW resonators. The ZnO thin films, showed clear c-axis orientation, were made by rf sputtering on bottom electrodes...

We report direct observation of controlled and reversible switching of magnetic domains using static (dc) electric fields applied in situ during Lorentz microscopy. The switching is realized through electromechanical coupling in thin film Fe(0.7)Ga(0.3)/BaTiO(3) bilayer structures mechanically released from the growth substrate. The domain wall motion is observed dynamically, allowing the direc...

Introduction: There have been growing demands in recent years for highly sensitive surface acoustic wave (SAW) sensors that are able to detect minute quantities, especially in the chemical and biological fields. AlN is a promising material to fulfil such a task because of its high SAW velocity and good piezoelectricity [1]. Compared to conventional bulk piezoelectric materials such as quartz an...

Over the past decade, many applications were intended for filtration by membrane technology especially the thin film composite (TFC) membranes. In advanced developments of thin film membranes, an attempt was made to spread a new generation of membranes called thin film nano composite (TFN) membranes. However, in the last generation of TFNs, an ultrathin selective film of nanoparticles is coated...

This work explores the viability of using 3D printing as a rapid-prototyping technique for microrobotic appendages made from thin-film PZT/polymer materials. First, the possibility of integrating piezoelectric materials into millimeter-scale (meso-scale) polymer melt-printed structures was investigated. Next, one specific robot limb geometry was chosen as a basis to compare structural modeling ...

The aim of this paper was to synthesize and characterize microbial chitosan thin films for potential piezoelectric application. Microbial derived from the Aspergillus oryzae fungus via extraction deacetylation. Chitosan film characterized its surface morphology, chemical properties, tensile strength, topography. For application as a material, characteristics were presented in terms electromecha...