S. Burgarella, B. Dell’Anna, V. Perna, G. Zarola, and S. Merlo
STMicroelectronics, Agrate Brianza, MI, Italy
Dipartimento di Elettronica, Università degli Studi di Pavia, Pavia, Italy
Dielectrophoresis (DEP) is a method for cell manipulation without physical contact in lab-on-chip devices, since it exploits the dielectric properties of cells suspended in a microfluidic sample, under the action of locally generated high-gradient electric fields. The DEP platform that has been developed offers an integrated solution for customizable applications. Several functional units, ...
A. Beerwinkle, R. Singh, and G. Kirikera
Mechanics of Advanced Materials Laboratory, School of Mechanical and Aerospace Engineering, Oklahoma State University, Tulsa, OK
Geophysical Research Company, LLC, (GRC) Tulsa, OK
A three-dimensional finite element model, based on the linear field equations for superimposed small vibrations onto nonlinear thermoelastic stressed media given by Lee and Yong, was developed. This method involves solving the thermal stress and piezoelectric model with geometric and material nonlinearities. The thickness-shear mode frequency response of the model was benchmarked to ...
A. K. Ramesh , P. Ramesh ,
College of Engineering Munnar, Munnar, Kerala, India
Microelectromechanical system (MEMS) based capacitive pressure sensor designs with improved sensitivity is always a matter of great concern and the recent developments in such a design is the MEMS capacitive pressure sensor with bossed diaphragm.The bossed diaphragm model improves sensitivity but it compromises the range of operation which lead to a new design with the segmented boss structure. ...
F. Wittbracht, A. Weddemann, A. Auge, and A. Hütten
Department of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, Bielefeld, Germany
In this work, we show that dipolar magnetic coupling can be used to control the particle flow through microfluidic structures without changing the state of motion of the carrier liquid. Also no external magnetic gradient fields are employed; the total external magnetic force applied is therefore zero. The theoretical idea will be tested experimentally. Here, additional effects originating from ...
王宗荣 [1,2], 王珊 ,
引言：柔性压力传感器在电子皮肤、智能假肢以及医疗监测诊断等领域发挥着十分重要的作用。因此压力传感器需要很高的灵敏度、较宽的敏感区间及稳定的性能。利用典型有机硅 PDMS 作为支撑层，聚合物 PEDOT: PSS 作为导电感应层制得的高度不均一微突结构的双压敏机制压阻传感器灵敏度达到了 851kPa-1。其探测范围广，性能优异，为解决目前压阻传感器中灵敏度低、敏感压力区间窄的难题提供了新思路。 COMSOL MULTIPHYSICS® 软件的使用：本文利用 COMSOL Multiphysics® 软件建立了不均匀微突结构的压阻式传感器模型，采用了结构力学与电流场两个物理场，通过电子接触对进行多物理场的耦合。研究在指定位移情况下，压阻式传感器电阻与电流的变化，从而得到灵敏度，验证不均匀微突结构压阻式压力传感器的双作用机制。同时，与均一微金字塔结构的压力传感器进行比较 ...
Study of Fluid and Mass Adsorption Model in the QCM-D Sensor for Characterization of Biomolecular Interaction
H.J. Kwon, C.K. Bradfield, B.T. Dodge, and G.S. Agoki
Department of Engineering and Computer Science, Andrews University, Berrien Springs, Michigan, USA
Increasing attention has been paid to application of the quartz crystal microbalance with dissipation (QCM-D) sensor for monitoring biomolecular interactions. This paper focuses on a practical application of protein-protein binding affinity measurement at low concentrations and minimal sample sizes (50-200 μl of 20-200 nM), which results in low signal measurement. A model simulating fluid ...
S. Druart, D. Flandre, and L.A. Francis
Université catholique de Louvain - ICTEAM, Louvain-la-Neuve, Belgium
In this paper, a methodology to simulate the electric behavior of spiral inductances is presented and discussed. All the methodology is built with the COMSOL software used with the Matlab scripting interface and then allows performing fully parameterized simulations. The program architecture is explained and is used to simulate two applications. The first calculates the voltage induced by an ...
M. J. Hancock, N. H. Elabbasi, M. C. Demirel
Veryst Engineering, LLC., Needham, MA, USA
Pennsylvania State University, University Park, PA, USA
Pumping liquids at small scales is challenging because of the principle of reversibility: in a viscous regime, the flow streamlines through a fixed geometry are the same regardless of flow direction. Recently we developed a class of microfluidic pump designs based on tilted flexible structures that combines the concepts of cilia (flexible elastic elements) and rectifiers (e.g., Tesla pump). We ...
Modeling, Simulation, and Optimization of Piezoelectric Bimorph Transducer for Broadband Vibration Energy Harvesting in Multi-Beam and Trapezoidal Approach
N. Chen , V. Bedekar ,
 Department of Engineering Technology, Middle Tennessee State University, Murfreesboro, TN, USA
The objective of the research is to design a broadband energy harvester device through the multi-beam approach and non-linear trapezoidal geometry approach. The performance of two piezoelectric PZT-PZN polycrystalline ceramic composition samples are simulated in COMSOL Multiphysics®, and results are compared using series configuration of a bimorph energy harvester which vibrates near the its ...
O. Myers , M. Anjanappa , and C. Freidhoff 
 Mississippi State University, Mississippi State, MS, USA
 University of Maryland Baltimore County, Baltimore, MD, USA
 Northrop Grumman Corporation, Electronics Systems Sector, Baltimore, MD, USA
This paper presents a methodology towards designing, analyzing and optimizing piezoelectric interdigitated microactuators using COMSOL Multiphysics. The models used in this study were based on a circularly interdigitated design that takes advantage of primarily the d33 electromechanical piezoelectric constant coefficient. Because of the symmetric nature of the devices, 2D axisymmetric models ...