V. S. Selvakumar, M. S. Gowtham, M. Saravanan, S. Suganthi, and L. Sujatha
Rajalakshmi Engineering College
Micro-tweezers have been widely investigated because of their extensive applications in micro-fluidics technology, microsurgery and tissue-engineering. It has been reported that thermal actuation provides greater forces and easier control when compared to electrostatic micro actuation. In this paper, we discuss about the effects of Alumina as gripper on the operation of micro tweezers. The ...
K. PraveenKumar, P. Suresh, K. Subash, M. Alagappan, A. Gupta
PSG College of Technology, Coimbatore, Tamil Nadu, India.
In this work, we present the performance analysis of novel micro machined Piezoresistive fluid flow pressure sensor using COMSOL Multiphysics. The principle of the sensing mechanism is based on the deflection of four sensing layers embedded on a thin membrane. The fluid passes through the layer causes the deflection of the sensing layer which measures the pressure of the fluid. The following ...
CFD-based Evaluation of Drag Force on a Sphere Unsteadily Moving Perpendicularly toward a Solid Surface: a Simple Model of a Biological Spring, Vorticella Convallaria
S. Ryu, and P. Matsudaira
Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
Department of Biology and Bioengineering, Massachusetts Institute of Technology, Cambridge, MA, USA
Vorticella convallaria, a sessile peritrich ciliate having a contractile stalk, is regarded as a model biological spring because of its remarkably fast contraction. Because the cell body shrinks to sphere-like shape during contractions, it can be assumed to be a sphere moving in quiescent water, and Vorticella’s contraction force has been evaluated with Stokes’ law. In this study, we ...
S. B. Umbarkar, G. Y. Rajput, R. Vasappanavara,
 Department of Electronics Engineering, RAIT, Navi Mumbai, Maharashtra, India.
In this paper, a carbon dioxide sensor is introduced. At present many CO2 sensors are available, but they all required power in the order of few watts, therefore they are not suitable for long term unattended operation. This paper gives the brief description of CO2 sensor modeling using the MEMS Module of COMSOL Multiphysics® software. These sensors are inexpensive, highly selective and ...
L. Moro, F. Lugli, and F. Zerbetto
Department of Chemistry “G. Ciamician”, Università di Bologna, Bologna, Italy
Rotaxanes are a class of molecules recently developed in laboratory that have been heralded as possible molecular motors. The motor is constituted by a linear molecule (thread) and a ring-shaped molecule (macrocycle), which is free to move along the thread, switching between two, or more, energetically stable interaction points (stations). Molecular motors start their functioning far from ...
Jawahar Engineering College, Affliated to Anna University, Chennai, Tamil Nadu, India
Microgrippers are typical MEMS devices used to pick, hold and transport micro-objects. Microgrippers are widely used in the field of micro-assembly, micro-surgery and manipulation of micro-particles. Thermal microgrippers are widely used for large displacement, high accuracy and repeatability. In this paper, a hybrid design electrothermal microgripper (Figure 1), based on Poly Methyl ...
A. Arpys Arevalo Carreno, E. Byas, I.G. Foulds
King Abdullah University of Science and Technology, Thuwal, Mecca, Kingdom of Saudi Arabia
In semiconductor gas sensors, the base of the gas detection is the interaction of the gaseous species at the surface of the semiconducting sensitive material. Since the chemical reactions at the surface of the sensor material are functions of temperature. We simulate our µHeater design on a Buckled Cantilever Plate (BCP). Such structure allows the sensor to be suspended for thermal insulation. ...
AC Electrothermal Characterization of Doped-Si Heated Microcantilevers Using Frequency-Domain Finite Element Analysis - new
K. Park, S. Hamian, A. M. Gauffreau, T. Walsh
Mechanical Engineering Department, University of Utah, Salt Lake City, UT, USA
Department of Mechanical, Industrial & Systems Engineering, University of Rhode Island, Kingston, RI, USA
This work investigates the frequency-dependent electrothermal behaviors of freestanding doped-silicon heated microcantilever probes operating under the periodic (ac) Joule heating. The transient heat conduction equation for each component (i.e., the low-doped heater region, the high-doped constriction region, and the high-doped leg region) is solved using the general heat transfer module for DC ...
T. Hoang [1,2], G. Poulin-Vittrant , G. Ferin , F. Levassort , C. Bantignies , A. Nguyen-Dinh , M. Bavencoffe 
 Advanced Research dept., VERMON S.A., Tours, France
 GREMAN UMR 7347, Université de Tours, CNRS, INSA Centre Val de Loire, Blois, France
Over the last decade, ambient vibration energy harvesting by piezoelectric materials has been an area of extensive research. This technology enables to convert wasted mechanical energy available in our environment into useful electrical energy to power up autonomous wireless sensors supply, for structural health monitoring applications, or implantable medical devices. The most common ...
VLSI Layout Based Design Optimization of a Piezoresistive MEMS Pressure Sensors using COMSOL Multiphysics
R. Komaragiri, Sarath. S., N. Kattabomman
NIT Calicut, Kozhikode, Kerala
This paper focuses on the diaphragm design and optimization of a piezoresistive Micro Electro Mechanical System (MEMS) pressure sensor by considering Very Large Scale Integration (VLSI) layout schemes. The aim of these studies is to find an optimal diaphragm shape by Finite Element Method (FEM) using COMSOL®, which is most suitable for VLSI layout. Optimal diaphragm shape is a diaphragm shape ...