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Nanowire Based Flexible Piezoelectric Sensor for Structural Health Monitoring Applications - new

A. El Kacimi [1], E. Pauliac-Vaujour [1], J. Eymery [2]
[1] University Grenoble Alpes, CEA, LETI, MINATEC Campus, Grenoble, France
[2] University Grenoble Alpes, CEA, Grenoble, France

We report on the modeling of flexible piezoelectric capacitive sensor based on GaN wires grown by Metal Organic Vapor Phase Epitaxy. Single crystal cone-shaped wires with hexagonal cross section are embedded within dielectric layers (parylene) in between two metal electrodes to achieve a capacitive structure. The device characteristics directly depend on growth conditions for example by tuning ...

Simulation of the Impedance Response of Thin Films as a Function of Film Conductivity and Thickness - new

Y. Jin [1], S. Kumar [1], R. A. Gerhardt [1],
[1] School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, USA

1. Introduction The electrical properties of materials are important in many different applications. In microelectronics for example, films must perform as insulators, semiconductor or as conducting layers. In recent years, scanning probe methods are being extended to the nanometre scale range since accurate high spatial resolution measurements of electrical properties are of great interest ...

Design, Simulation, and Fabrication of Thermal Angular Accelerometers - new

H. Alrowais [1],
[1] School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA

This abstract introduces a sensor design for detecting angular acceleration in a single plane using thermal convection. The working principal of the device is based on probing temperature profile changes along a micro-torus caused by angular acceleration. By properly choosing the locations of the heaters as well as the temperature sensors, the output signal will correlate to in-plane angular ...

A Comparison of Mass Reduction Methods for Silicon-on-Oxide (SOI)-based Micromirrors - new

H. J. Hall [1], L. A. Starman [1],
[1] Sensors Directorate, Air Force Research Laboratory, Wright-Patterson AFB, OH, USA

Beam steering and adaptive optics micromirror applications commonly demand optically flat surfaces with minimal mass. When reflective coatings (usually metallic Au or Al) are applied to micromirror surfaces in order to meet optical reflectivity requirements the resulting film stress (usually tensile) can be substantial. The mass of the mirror can be a limiting factor in the dynamic performance. ...

PVDF Piezoelectric Nanofibers as Hair Cell Substitutes: A Feasibility Study - new

C. R. Pérez [1], J. J. Santiago-Avilés [2],
[1] Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, USA
[2] Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, USA

Sensorineural hearing loss is the most common sensory deficit in the world, and within this category damage or loss of the primary sensory cells of the inner ear, known as hair cells is the most common cause [1]. Partial hearing loss is addressed by the use of hearing aids, electronic devices that greatly amplify sound directly into the user's ear, but for more severe cases cochlear implants are ...

Simulation of a Tether Structure for Ultra-stretchable Monolithic Silicon Fabric - new

A. Arevalo [1], J. Prieto [1], M. M. Hussain [1], I. G. Foulds [2],
[1] Computer, Electrical, & Mathematical Sciences & Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
[2] The University of British Columbia, School of Engineering, Vancouver, BC, Canada

The role of stretchable electronics systems allows the design of new reconfigurable macro-electronics, that extends a device capability to function as a distributed sensor network which can potentially be used for wearable electronics. At the moment such devices are primarily based on polymeric materials such as PDMS or Polyimide. Nevertheless, silicon has been the predominant material in ...

MEMS Electrostatic Acoustic Pixel - new

A. Arevalo [1], D. Conchouso [1], D. Castro [1], I. G. Foulds [2],
[1] Computer, Electrical, & Mathematical Sciences & Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
[2] The University of British Columbia, School of Engineering, Vancouver, BC, Canada

The growth of the electronics industry demand better components for the electronic systems. Such components need to be improve to keep up with the evolution of the digital era. The loudspeaker design has not been changed for almost a century [1-5]. The acoustic transducer is the last analogue component needed for a true digital audio system. We want to validate the feasibility of using an ...

Calculation of Surface Acoustic Waves on a Piezoelectric Substrate using Amazon™ Cloud Computing - new

U. Vogel [1], M. Spindler [1], S. Wege [1], T. Gemming [1]
[1] Leibniz Institute for Solid State and Materials, Dresden, Germany

In this work, we seek to simulate SAWs for a better understanding and to benchmark the currently available cloud computing possibilities of COMSOL Multiphysics® software. By using the MEMS module we demonstrate 3D models with reduced geometry to achieve principle information about the wavefield. For a benchmark, a high-speed workstation with limited memory (RAM) is compared to the most potent ...

Simulation of a Thermoelectric Spiral Structure - new

A. Arevalo [1], J. P. Rojas [1], D. Conchouso [1], M. M. Hussain [1], I. G. Foulds [2]
[1] Computer, Electrical and Mathematical Sciences and Engineering (CEMSE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
[2] The University of British Columbia, School of Engineering, Okanagan Campus, Canada

Energy efficiency and harvest, speed and performance, flexibility and portability are key elements for innovation in the current consumer electronics markets. Thermoelectric Generators can convert energy from heat gradients into electricity. Every source of heat from an electronics device can potentially be used as a source of energy. This generators have the advantage of: being silent, compact, ...

Modeling and Simulation of Damping Resistance of a Cantilever Based Energy Harvester - new

M. I. Hassan [1], A. Brimmo [1], A. N. Chatterjee [2],
[1] Masdar Institute of Science and Technology, Abu Dhabi, UAE
[2] MEMS Department, GLOBALFOUNDRIES, Singapore, Singapore

The multilayer composite single mass cantilever is a MEMS energy harvester structure. The vibrating structure is under vacuum in hermetic MEMS. However, out-gassing during process integration and fabrication would cause air molecules (e.g. hydrogen, nitrogen, argon, water vapor, oxygen, ammonia, nitrous oxide, carbon dioxide, carbon monoxide, etc.) to be present in the cavity, and therefore vary ...