Richard M. White (Advisor)

Nam-Trung Nguyen

Alumni
Professor Richard M. White (Advisor)
PostDoc 1997-1998

Microfiltration and Flexural Plate Wave Devices

Pamela Caton
Richard M. White
2001

Current MEMS microfilter improvement is driven by the need to perform absolute separation of micron-sized particles from milliliter-scale uid volumes. Such filtration is an essential step in many biological and medical applications. For example, routine blood tests require separating blood plasma from whole blood. Using microfabrication techniques it has recently become possible to create integrated miniaturized fluid-handling devices. Promising applications include miniaturized systems for the filtration, fractionation, and manipulation of biological cells and DNA. Before such promise can...

Justin Black

Alumni
Electrical Engineering and Computer Sciences
Professor Richard M. White (Advisor)
Ph.D. 2006

MEMS-Based System for Particle Exposure Assessment Using Thin-Film Bulk Acoustic Wave Resonators and IR/UV Optical Discrimination

Justin Black
Richard M. White
2006

Airborne particulates are responsible for severe adverse effects on human health, examples being the lung disease caused by tobacco smoke and severeasthmatic reactions to certain other particulates. Present instrumentation to measure such particulates is bulky, costly to purchase, and difficult to operate; its use in field studies usually requires sending samples collected to an analytical laboratory in order to identify the particulates. This dissertation describes a...

A Micromachined Acoustic Immunosensor for the Detection of Breast Cancer Antigens

Amy Wang
Richard M. White
1997
We have developed an acoustic immunoassay that couples a mass-amplifying label with a silicon-micromachined gravimetric sensor, the Flexural Plate Wave (FPW) device. This assay has direct application to the diagnostic detection of a breast cancer antigen in the sera...

Micromachined Silicon Ultrasonic Longitudinal Mode Actuators: Theory and Applications to Surgery, Pumping, and Atomization

Amit Lal
Richard M. White
1996
A silicon-based high-intensity ultrasound actuator technology is developed. It is shown that silicon's high maximum ultrasonic particle velocity, high thermal conductivity, and low internal loss, make it an ideal resonator material for high-intensity ultrasonic actuators. Furthermore, it is expected that silicon micromachined batch...

Integrated-Circuit-Compatible Electret and Condenser Ultrasonic Transducers

Jonathan Bernstein
Richard M. White
1983
This dissertation presents research on the design, analysis and construction of thin film electret and condenser ultrasonic transducers which are compatible with integrated circuit fabrication. In addition, materials research is ...

Ultrasonic Microtransport

Richard M. Moroney III
Richard M. White
1995
We have observed numerous kinetic effects using ultrasonic flexural plate waves (EPWs) in 4-um-thick composite plates of low-stress silicon nitride, piezoelectric zinc oxide and aluminum. The wavelength is typically 100 um, and the area 3 x 8...

Richard M. Moroney III

Alumni
Electrical Engineering and Computer Sciences
Professor Richard M. White (Advisor)
Ph.D. 1995

Applications of Ultrasonic Lamb Waves

Stuart Wenzel
Richard M. White
1992

Ultrasonic flexural Lamb waves in thin films have applications for sensing and actuation. We begin with a review of the Rayleigh-Lamb dispersion relation, which governs the propagation of Lamb waves in free, homogeneous, isotropic plates. We derive the dispersion relation for the lowest-order flexural (A0) mode in terms of in-plant tension, stiffness, mass per unit area and rotary inertia. A radiation-load method is used to treat viscoelastic loading. The resulting dispersion relations accurately predict sensor response -- changes of wave velocity, frequency and attenuation -- to various...