Albert P. Pisano (Advisor)

APP94: Mechanical Analysis of SiC for Use as a High Temperature, Pressurized Micro Reactor

Jonathan Rheaume
2004

A high temperature, pressurized micro reactor is highly desireable for several applications. A study of SiC (silicon carbide) as the structural material was undertaken to determine the suitability of using deposited SiC for reactions such as steam reforming.

Project end date: 02/01/05

APP44: MEMS Rotary Engine Power System / Integrated Generator

Matthew Senesky
2004

The goal of the MEMS REPS Integrated Generator project is to design and fabricate a millimeter-scale electric machine to generate power from the mechanical torque of a liquid hydrocarbon fueled MEMS rotary engine.

Project end date: 02/03/05

APP36: GHz Nano-Mechanical Resonators

Brian Bircumshaw
2004

The objective of this project is to design, fabricate, and demonstrate Nano-Mechanical Resonators (NMRs) with GHz natural frequencies. The Radial Bulk Annular Resonator (RBAR), our newest concept, represents a breakthrough in NMR design. Unlike its contemporaries, the RBAR can be arbitrarily sized for any given frequency. This provides design flexibility and increases the mechanical Q of the RBAR. Most importantly, the arbitrary sizing of the RBAR means tremendous reductions in the device’s equivalent resistance, Req. This leads to drastically reduced insertion loss, lower power...

APP86: Microfluid Integrated Nano-Scale Biological Cell Probes

Jesse Herrick
2004

Biologists at Lawrence Livermore National Laboratory are performing rigorous cell research, in which standard cell analysis techniques has provided limited information. The current analysis techniques are typically external observation based, however, it has become apparent that internal observation techniques may be required for a better and more thorough understanding of cellular function. The devices under investigation in this collaborative project between LLNL and UC Berkeley aim to help fulfill this need. The devices, which are based on both MEMS and NEMS technologies, will be...

APP63: Sickle-Cell Anemia Event Detection Sensor

Jennifer S. Wade
2004

The objective of this project is to design, fabricate and test a micro-flow channel that can be used to accurately simulate, detect, analyze and predict the rheological properties of Sickle Cells flowing through arteriole bifurcations of various diameters and lengths. One property of interest is the effect blood osmolarity variations has on Hb SS red cell compliance, as well as, the variation of hematocrit levels. Ultimately, this data and the trends extrapolated from it will be used to understand the differences between healthy and Sickle blood flow in arterioles. As well as,...

APP84: Microfluidic System for Cryogenically Storing and Reviving Biological Cells

Natalya Etina
2005

The project goal is the design, fabrication, and testing of the structural component in the cell-based environmental monitoring sensor. The structure will consist of a microfabricated array of cell wells as well as multi-level microfluidic manifolds to carry the necessary fluids to these wells. While the cells are being stored, liquid nitrogen would flow through channels around the wells and bring the cells to cryogenic temperatures. At room temperature, the functioning cells would be supplied with food and have their waste removed through two separate fluid lines under the wells....

APP72: MEMS REPS: Assembly of a MEMS Compressed Air Expander Unit

Jose D. Rosario-Rosario
2005

The objective of this research is to demonstrate power generation at the micro-scale using a compressed air expander. The setup includes a rotor with embedded magnetic poles, spinning inside housing with an integrated functional electricity generator. The means for actuation of the system will be using compressed air as the driving force. The ultimate goal of the demonstration task is to complete and deliver working units to Textron Systems and the Defense Advanced Research Projects Agency (DARPA). Proper assembly techniques are being developed to integrate all the parts that make up...

APP62: Piezoelectric Aluminum Nitride Vibrating RF MEMS for Radio Front-End

Gianluca Piazza
2005

The demand of consumer electronics for RF filters and frequency reference elements has focused attention on the reduction of size, power consumption and price and pushed current research interests towards the manufacturing of a single-chip, integrated RF solution. Vibrating contour-mode MEMS resonators constitute the most promising technology for ultimately realizing this vision. This project deals with analytical and experimental results on a new class of contour-mode aluminum nitride piezoelectric resonators. The realization of contour mode shapes in piezoelectric resonators,...

APP46: MEMS Rotary Engine Power System / Engine Fabrication

Fabian C. Martinez
2005

The goal of the MEMS REPS / Engine Fabrication is to fabricate a MEMS-scale rotary engine within tolerances predetermined by numerical modeling.

Project end date: 01/07/06

BPN305: Post-processing heat treatment of thin film Aluminum Nitride

David Park
2005

Piezoelectric aluminum nitride (AlN) is a promising material for sensor and wireless communication technology. Some industry applications today include acoustic wave sensors, chemical sensors, and high frequency devices. It is a high thermal conductive material with high acoustic velocity and is not only resistant to humidity and high temperatures but also to wafer processing gases and plasma erosion, making it suitable to use as a thin film. Proper management of stress in the film is necessary to prolong the life of the microstructures and keep the devices fabricated from these...