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Degeneracy Breaking, Modal Symmetry and MEMS Biosensors

H.T.D. Grigg[1], T.H. Hanley[1], B.J. Gallacher[1]
[1]Newcastle University, Newcastle upon Tyne, United Kingdom

This work is concerned with systems possessing cyclic symmetries. In particular, we concentrate on the case in which the medium possesses infinite order cyclic symmetry, while the constitutive relations have cyclic symmetry of a lower order. We investigate the interactions between modes with cyclic symmetry of order n and geometries with underlying cyclic symmetry of order M. Rayleigh's ...

Design of MEMS-based Microcantilever for Tuberculosis Detection

Saranya K[1], Saranya R[1], Ceemati D[1], Chandra Devi K[1], Meenakshi Sundaram N[1]
[1]PSG College of Technology, Coimbatore, Tamil Nadu, India

Tuberculosis is infectious disease caused by various strains of Mycobacterium tuberculosis. The detection is very difficult because their mechanism is not well understood, and it is mainly based on the γ interferon which is normally secreted by the T-cell of the body. The RD1 region is genomic and is present in all strains of Mycobacterium tuberculosis. The ESAT-6/CFP-10 complex is secreted by ...

Multiphysics Simulation of a Self-heating Paraffin Membrane Microactuator

P. Lazarou[1], C. Rotinat[1]
[1]CEA LIST/DIASI/LRI, Paris, France

A grand variety of microactuator technologies and demonstrators has been introduced during the last years. Of particular interest are the microactuators based on phase change materials and especially paraffin wax, which can volumetrically expand up to 15%, providing high force actuation. The object of this study is the numerical validation of a paraffin microactuator concept by coupling multiple ...

Design of Pressure Measuring Cells Using the Unified Material Law

P. Aguirre[1], F. Figueroa[1]
[1]Sensor Technik Wiedemann GmbH, Kaufbeuren, Bayern, Germany

Pressure Sensors are widely used in the automotive industry. Their main use is the dynamic monitoring of pressure inside combustion engines. To achieve a good signal accuracy, the design of pressure sensors can be improved with FEM calculations of stress and strains on the measuring cell depending on their geometry and material properties. The geometry is adapted according to a special ...

Design and Simulation of Valveless Piezoelectric Micropump

L. Nayana[1], P. Manohar[1], S. Babu[1]
[1]Department of Electrical Engineering, Visvesvaraya Technological University, Bangalore, Karnataka, India

In this paper some discrete parts of a valveless piezoelectric micropump for drug delivery system is designed and simulated. The core components of the micropump are actuator unit that converts the reciprocating movement of a diaphragm actuated by a piezoelectric actuator into a pumping effect and Nozzle/diffuser elements that are used to direct the flow from inlet to outlet. Simulations are ...

Implementation of ALE Moving Mesh for Transient Modeling of Nanowire Trajectories Caused by Electrokinetic Forces

S.M. Davison, and K.V. Sharp
Pennsylvania State University

Moving nanowires through microfluidic channels under electrokinetic forces can be a valuable technique to aid in the fabrication of certain devices. The trajectories of a nanowire under the influence of an externally applied electric field have been modelled through a straight channel, through a converging channel, and around a 90° corner. In a straight channel, a nanowire initially ...

Finite Element Analysis of BAW Sensor

M. Hashiguchi[1], Y. Sumiyoshi[1]
[1]Keisoku Engineering System Co., Ltd., Tokyo, Japan

Achieving passive device working over two GHz bands for next generation mobile phone has been strongly desired. This paper investigated the spurious mode suppression for the BAW resonator. The border-frame technique which has been proposed in many literatures is examined here numerically. It was found that the present finite-element analysis using COMSOL Multiphyiscs® was validated via ...

Optimizing the Performance of MEMS Electrostatic Comb-Drive Actuator with different Flexure Springs

S. Gupta[1], T. Pahwa[1], R. Bansal[1], V. Bansal[1], B. Prasad[1], D. Kumar[1]
[1]Electronic Science Department Kurukshetra University, Kurukshetra, Haryana

A new design of electrostatic comb drive actuator is presented in this paper by using different spring designs and with different folded beam lengths. An increased displacement of lateral comb drive actuator will subsequently be accomplished with the same actuation voltage. Stress distribution over different spring designs are simulated by COMSOL 3.5a using a standard comb drive with 4 movable ...

Mathematical modeling of nanomaterials

Strauss, D.J., Trenado, C.
Institute of New Materials, Saarbrücken

Mathematical modeling at the Institute of New Materials has played a crucial role in supporting the manufacturing and design of new technologies of nanomaterials, whose applications range from transportation, electronics and optics engineering to environmental sciences. In this paper, we focus our attention to two mathematical models together with their corresponding FEMLAB simulations: The ...

A Computational Approach for Simulating p-Type Silicon Piezoresistor Using Four Point Bending Setup

T.H. Tan[1], S.J.N. Mitchell[1], D.W. McNeill[1], H. Wadsworth[2], S. Strahan[2]
[1]Queen's University Belfast, Belfast, United Kingdom
[2]Schrader Electronics Ltd, Antrim, United Kingdom

The piezoresistance effect is defined as change in resistance due to applied stress. Silicon has a relatively large piezoresistance effect which has been known since 1954. A four point bending setup is proposed and designed to analyze the piezoresistance effect in p-type silicon. This setup is used to apply uniform and uniaxial stress along the crystal direction. The main aim of this work is to ...

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