J. J. Ruz Martinez
Instituto de Microelectronica de Madrid
The motion of a resonant NEMS has been widely studied for many different applications such as structural mechanics in engineering, ultra sensitive mass spectrometers or the well known Atomic Force Microscope. The study of the eigenfrequencies of such structures is very important, and nowadays there are good theoretical methods to accurately predict such eigenfrequencies. When a little mass is ...
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 ...
Multiphysics Modeling of Implantable Micro-Electrode for Diagnostic and Therapeutic Applications in Neural Disorders
H. W. Ferose, R. G. Prasath, M. Alagappan, and G. Anju .
PSG College of Technology
Tamil Nadu, India
Neural disorders like epilepsy, Parkinson’s disease and Alzheimer’s disease have become a major area of concern because of their complexity and the huge number of occurrences. At present, most of the treatments are based on drugs and external nerve stimulation demanding critical care. This study aims at the design and simulation of an implantable micro-electrode which can lead to better ...
V. Sista, and E. Bhattarchaya
Microelectronics and MEMS Lab
Department of Electrical Engineering
Indian Institute of technology Madras
A MEMS based Knudsen’s pressure gauge working in the range of 1e-5 mbar to 10 mbar is designed and simulated in COMSOL. The working principle is based on Knudsen’s forces that arise when two plates are held at different temperatures and their separation is comparable to the mean free path of the ambient gas molecules. The forces change the separation between the plates and capacitance between ...
S. Harrison, M. Young, M. Hayne, P. D. Hodgson, R. J. Young, A. Strittmatter, A. Lenz, U. W. Pohl, D. Bimberg
Department of Physics, Lancaster University, Lancaster, UK
Institut für Festkörperphysik, Berlin, Germany
Low-dimensional semiconductor nanostructures, in which charge carriers are confined in a number of spatial dimensions, are the focus of much solid-state physics research, offering superior optical and electronic properties over their bulk counterparts. Both two-dimensional (2D) and zero-dimensional (0D) structures have seen wide-ranging applications in laser diodes, solar cells and LEDs to name ...
S. Nelson, and M. Guvench
University of Southern Maine, Gorham, Maine, USA
COMSOL Multiphysics is employed to model, simulate and predict the performance of a high Q, in-plane rotational resonating MEMS sensor. The resonating sensor disk is driven by thermal expansion and contraction of the support tethers due to AC joule heating. The resonant frequency is sensed by stationary contacts. For cost reduction, the relatively simple, low cost SOIMUMPS fabrication process is ...
A. S. Zurkinden1, F. Campanile1, and L. Martinelli2
1Swiss Federal Institute of Technology (ETH), Zürich, Switzerland
2Università di Bologna, Bologna, Italy
This note addresses the concept of wave energy conversion by means of a piezoelectric material. The ocean surface waves represent an important source of energy. A multiphysics simulation is used to focus on different aspects, namely the free surface wave, the fluid-structure interaction, the mechanical energy input to the piezoelectric material and the electric power output, using an equivalent ...
H. Prentice-Mott, D. Irimia, A. Russom, and M. Toner
Center for Engineering in Medicine (BioMEMS Center), Massachusetts General Hospital, Charlestown, MA, USA
Microfluidics is able to provide many benefits to the fields of biology and chemistry through its ability to use small amounts of fluid and to finely control the environment of the experiment. However, the precision of the flow rate control at the microscale remains limited to either off-chip variable-flow-rate pumps or on-chip valves.Here, we report an on-chip pneumatic valve that allows for ...
L. Mao, and H. Koser
Department of Electrical Engineering, Yale University, New Haven, CT, USA
We report on the design and simulation of a novel, micro-scale mixing device based on stable water suspensions of magnetic nanoparticles (i.e. ferrofluids). In this paper, a two dimensional COMSOL Multiphysics simulation including time domain electromagnetics, fluid dynamics, diffusion and convection, and user-defined PDEs is used to study the mixing efficiency of the ferrohydrodynamic ...
H. Pakdast, Z. Davis
DTU Nanotech, Technical University of Denmark, Kgs. Lyngby, Denmark
This article describes the development of a bulk mode resonator which can be employed for detection of bio/chemical species in liquids. The goal is to understand the mechanical and electrical properties of a bulk mode resonator device which exhibit high frequency resonance modes and Q-factor. A high resonance frequency is desirable because a small change in the resonator’s mass, for ...