Group Members

Professors


Professor Fumio Ohuchi

Education
Sophia University, Tokyo, Japan, B.S., Physics, 1972 Sophia University, Tokyo, Japan, M.S., Physics, 1974 University of Florida, Gainesville, Florida, Ph.D., Materials Science & Eng., 1981

Overall Research Theme
Understanding physical and chemical processes at dissimilar material interfaces Materials technology in the next generation relies on the manipulation and control of atoms and molecules at surfaces and interfaces. Understanding physical and chemical processes at the material’s surfaces and dissimilar interfaces is an overall theme of Dr. Ohuchi’s research over the past two decades. His primary research is focused on (i) Physical and chemical processes involved in epitaxial growth dissimilar materials, and (ii) Synthesis, characterization and transport properties of the Group VI compounds (oxide, sulfides, selenides, and telluride) thin film materials. Publications listed in the curriculum vitae are divided into three categories: (1) Chalcogenide (sulfide, selenide, and telluride) thin film hetero-epitaxy and their interfaces, (2) Oxide thin films and their surfaces and interfaces, and (3) Electron spectroscopy related work.
Dr. Ohuchi has been involved in a new type of material development strategy called "Combinatorial Materials Exploration (CME)" in collaboration of Dr. Chikyow of National Institute of Materials Science, Tsukuba, Japan. CME as a new research approach to explore an extremely large multi-variant materials space is rapidly becoming a new paradigm for accelerated materials research by enabling both screening and understanding complex material systems in a time- and cost-effective manner. He is now using this technique to explore electrically conductive transition metal oxides for electronic use. His work has recently been published [2.10-1]. Currently he is building his new CME laboratory at the University of Washington. Systematic variance of properties with material’s composition or processing parameters yields information on nanoscale mechanisms underlying structure-property relationships; for example changing average valence or atomic separation [3.1, 3.2, 2.15-11]. He believes that successful application of CME to critical problems in the microelectronics area facilitates further advancement of inorganic materials science programs as a whole.

Prof. Fumio
Ohuchi
Professor Marjorie Olmstead

Teaching
Course Home Pages for previous quarters may be found here.

Research
Our RESEARCH PROGRAM centers on both the basic physics and technological potential of intrinsic vacancy materials such as Ga2Se3 and Ga2O3.

Recent publications. Recent publications may be seen here.

Nanotechnology Ph.D. Program
Professor Olmstead directs the UW Dual Degree Ph.D. Program in Nanotechnology. The CNT Education Web Page is HERE.
A short powerpoint presentation with details on the program is HERE.
She also is principal investigator for the NSF-NIH IGERT: Building Leadership for the Nanotechnology Workforce of Tomorrow (DGE 0504573).
You may also wish to visit the Center for Nanotechnology HOME PAGE.

Prof. Marjorie
Olmstead

Graduate Students


Christopher Dandeneau

Bio Coming Soon

Christopher
Dandeneau
YiHsun Yang

First year Ph.D student from Taiwan. I had my Bachelor degree in Chemistry and Master degree in Organic Chemistry. Working on Strontion Barium Niobate (SBN), with Tetragonal Tungsten Bronze (TTB) structure. TTB is a facinating structure. My interest is to introduce different cation and change its physical properties.

YiHsun Yang
Ben Krueger

I am a fifth-year graduate student in the department of physics. My research is focused on understanding the origin of conductivity in gallium oxide thin films, and learning to control it by the introduction of impurities. I am also interested in the potential to design a hetero-interface between intrinsic and doped Ga2O3 for device applications. Using pulsed-laser deposition we are fabricating combinatorial thin films with linearly increasing doping concentration in one direction, and studying physical trends in film properties along the composition gradient, using several characterization techniques. I am also involved with our groups' thermoelectrics project, to produce combinatorial thin films of strontium barium niobate and characterize them using XPS and XRD. In my spare time I enjoy playing piano, snowboarding and hiking in the mountains around Seattle.

Ben Krueger
Bo Zhao

My main research focus is to understand structural, electronic, and electrical properties of Ga2O3. Most intriguingly, Ga2O3 exhibits resistive switching behavior when frabricated into metal/Ga2O3/metal nano-strucuture, which is a very promising candidate for next generation mainstream memory device. I'm also involved in collaborations within/ouside our group for material characterization using XPS and SEM etc.

Bo Zhao
Alex Henson

Alex was born and raised in Seattle, Washington. He attended the University of Washington for his undergraduate degree in Materials Science and Engineering. In his research, he is investigating how a unique plasma source can be utilized in the processing of materials. Specifically the plasma/material interaction and how that changes with different plasma parameters. In his spare time, Alex enjoys playing tennis, eating good food, SCUBA diving and unwinding with yoga.

Alex Henson
Shamus O'Keefe

coming soon

Shamus O'Keefe
DuWayne Smith

coming soon

DuWayne Smith
Alan Huynh

coming soon

Alan Huynh

Undergraduate Students


Jessica Tjalsma

I am currently an undergraduate student at University of Washington pursuing both Physics and Materials Science and Engineering degrees. I have been a member of this research group since Spring of 2012 and have mostly worked in characterization of Ga2 O3 single crystal and thin films using ellipsometry, UV/Vis spectroscopy, and XPS. Projects to date have included modeling the anisotropic optical constants of Ga2 O3 using ellipsometry and band gap measurements of thermoelectric materials SBN, LiNbO3, and LiTaO3 using UV/Vis and ellipsometry. Currently, I am working on designing a UV detector based on graduated Materials Science PhD student Hien Pham's thesis "Metal/β-Ga2O3 Interface chemistry & junction electronic properties" and am planning on assisting Physics PhD student Ben Krueger with his research on Ga2O3 thin films.

Jessica Tjalsma
Saleh Shaar

I am currently a Senior in the Materials Science and Engineering department at the University of Washington. I am interested in the electronic properties of materials and their applications in energy storage and transfer. I am currently working on a prototype for a piezoelectric cooler using SBN crystals.

Saleh(AJ) Shaar
Joseph Thompson

I am an undergraduate in Materials Science and Engineering. I joined Ohuchi’s group in autumn of 2013 working on material characterization of Aluminum Nitride exposed to plasma through XPS, SEM and XRD.  Ohuchi’s group caught my eye because they work with plasma and the project has applications to space technology which I am interested in. Plus I get to say I work with a fusion engine, which is pretty cool.

Joseph Thompson
Nicholas Erwin

My name is Nick Erwin and I am a senior here at the University of Washington in the Material Science and Engineering department. My research focusses around Deuterium interaction with various materials with the current material of focus being Beryllium Oxide. DuWayne Smith is the advising graduate student on each of my individual projects, with professor Ohuchi residing over the research as well.

Nicholas Erwin
Logan Fox

My name is Logan Fox and I am a Senior in Materials Science and Engineering. My main interest is the applications and processing of ceramic matrix composites. I am working with Prof. Ohuchi to determine the effect of high-density transient plasma on the surface chemistry of silicon carbide. I spend my free time riding my bike, hiking, and studying German.

Logan Fox
David Scales

My name is David Scales and I am a senior in the department of materials science and engineering. I am currently researching the effects of nanocomposites in thermoelectrics. 

David Scales
Jacob Fullen

I am one of three MSE seniors contributing to the design, development, and building of a 3D printer for use in the undergraduate labs. This project began during the 2013 summer quarter and will be implemented during the 2014 winter quarter. During the lab section students will learn the fundamentals and terminology of 3D printing. Using a modeling software, such as SoildWorks, almost anything imaginable can be designed and printed. In fact, many of the parts used to construct this printer were created using an existing 3D printer. I am currently living and grew up in Kent, WA. Outside of school I enjoy running and work as a Distance Track and Cross Country Coach at Green River Community College. 

Jacob Fullen
Ryan MacDonald

I am Ryan MacDonald and I am a senior in the Materials Science & Engineering Department. Currently I am working with YiHsun Yang to develop a new Seebeck tester to allow for measurements at elevated temperatures, and eventually develop new thermoelectric oxides.

Ryan MacDonald
Ruiqian(Jennifer) Xu

I am a senior undergraduate student studying Material Science and Engineering, and I joined professor Ohuchi's Ga2O3 group in summer of 2013. For my current research project, I am seeking to establish a two-phase Ga2O3 junction for use in photocatalysis. I have worked on fabricating, charactering Ga2O3 nanopowders with both alpha and beta phases, and I am trying to synthesize alpha-beta Ga2O3 thin film.

Ruiqian Xu

Where Are The Graduates?