Lai, Ming-Liang (2015) Developing piezoelectric biosensing.
The piezoelectric effect of III-V semiconductors are nonlinear in the strain tensor. The quadratic piezoelectric coefficients and a revised value of the spontaneous polarization are reported. Furthermore, the ZnO nanowires is found to be non-linear piezoelectric effect and leads to predictions in some cases opposite to those obtained using the widely used linear model.
This thesis presents a study of selective structural mode actuation of simple structures by means of surface-bonded piezoelectric actuator patches. The central objective of the study is to establish the potential for the use of piezoelectric actuators in active rotor blade vibration control applications.
The performance of piezoelectric cantilever beam energy harvesters subjected to base excitation is considered in this work. Based on the linear assumption, a theoretical model is developed to predict the mechanical and electrical responses of the harvester and in comparison to other theoretical models, more accurate mode shape functions are used for the structural part of the harvester.
In recent years, the rapid development of low power consuming devices has resulted in a high demand for mobile energy harvesters. The main contribution of this thesis is to optimize the novel piezoelectric energy harvesting device called the piezoelectric flex transducer, which was developed by other researchers for the purpose of harvesting biokinetic energy from human gait.
The output from a piezoelectric buzzer is only in the range of a few millivolts. Piezoelectric generator creates power from shoes. Once you have located the diodes, you can take them off by heating up the solder with your soldering iron and pulling latex citation phd thesis diodes away.
The structure and physical properties of the lead-free piezoelectric niobate perovskite material sodium potassium niobate, KxNa1-xNbO3 (KNN) have been investigated via a variety of experimental techniques. High- and low-temperature X-ray and neutron powder diffraction has been performed on polycrystalline samples of KNN. Rietveld refinement has been carried out on data for samples of KNN from.
Over the last decade, advancement of microelectronics has triggered a growing interest in ambient energy harvesting. Ambient energy can be found in various forms such as: thermoelectric, acoustic, solar, and mechanical vibrations. Most of the stated ambient energy sources have been thoroughly investigated. One of the relatively unexplored ambient energy sources is raindrop impact energy.