Piezoelectric motor is based on generating traveling waves on a finite structure. It can be classified into linear and
rotary types. Among them, linear motors have an inevitable problem since finite boundaries are always exist, and reflected
waves can hinder the formation of propagating waves. To solve this problem, a linear motor based on a single driving
frequency and two induced resonant molds are previously reported. However, the driving frequencies are not at structure
resonant frequency, the efficiency of linear motor is based on the superposition of two adjacent bending modes. The
traveling wave is created by two piezoelectric actuators driven by a single frequency in between these two resonant molds
with a 90° phase difference. Based on previous report, it shows that by placing these two 0.178/L length actuators at 0.22/L
and 0.78/L on a one-dimensional beam with length L, an optimal performance could be reached. It suggested that the
location and size of the two piezoelectric actuators can be used to optimize the performance of the linear motor. In this
study, finite element simulation was used to study the contributions of the temporal and spatial correlations between the
two actuators with respect to a 1-D linear motor. The position and size of these two piezoelectric actuators are studied for
optimizing the performance of the linear motor.
Detecting minute trace of interferon-gamma and various bio-markers by using a single biochip was adopted as a platform to examine the technology advancements presented. As bio-detection faces the restriction that only very small quantity of specimen is available, ways to make the best use of the sample available are a must. Since samples concentration will affect the binding rate of an immunoassay, the testing order will become an influencing factor if multiple biomarkers testing situation are needed by using only a single trace of sample. More specifically, if we test disease A first and then detect disease B using the sample just been measured by testing disease A, we most likely will get different results if we reverse the testing order. With an attempt to examine and maybe resolve the issues mentioned above, a micro-fluid control system was developed. The design requirements not only ask for microfluidic control but also demand the system developed has the potential to be integrated within the biochip once its performance is verified. A piezo-vibrating system that can generate traveling waves for microfluidic control was chosen due to its versatility and large force to volume ratio. A simulation software COMSOL was adopted first to predict the microfluidic behavior of the two-mode excited piezo-microfluidic transport system. Secondly, fluorescent particles was used to analyze the microfluidic behavior of system fabricated based on the simulation. Finally, Electrochemistry Impedance Spectroscopy (EIS) was implemented to verify the performance and extendibility of this newly developed system for multi-target detections.