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 - Spring 2012
Frontiers in Nanotechnology
Co-listed as Phys 576A, Chem 560A, BioEng 599F and NME 498A.
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

I am from Taiwan. I am applied master student with organic chemistry back ground working on TE project. My passion is to utilize solution combustion synthesis trying to find out a low cost high ZT dopant system to thermoelectric oxide. The ultimate objective is to solve the energy deficiency through waste heat recycling.

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
Sam Zheng

Ga2O3 is a 4.8eV band gap semiconductor exhibits insulator-conductor transition upon temperature change or subjected to electric field. My research seeks to understand the mechanisms for conductivity change in Ga2O3, as well as to explore the role of crystal structure, stoichiometry, impurities and processing conditions on this transition.

Sam Zheng

Undergraduate Students


Weillian Gao

I am Weilian, an undergrad student from China. I am currently a senior at the University of Washington, majoring in Material Science and Engineering. I became to know Prof. Ohuchi in the Junior year taking his designed Junior lab courses and did a Junior project on Cu2O3 photovoltaic cell with my peers. Though the project’s outcome was not as desirable as expected, I learned a lot from it and decided to learn more about this area. Fortunately, in my senior year, I joined Prof. Ohuchi’s group on Ga2O3’s potential application in such area. I am currently learning vacuum technology under the guidance of the group’s grad students and I really enjoyed it. In my spare time, I love to play ping pong and Taiji as sporting activity and I also enjoy doing Chinese calligraphy.

Weillian Gao
An Dang

I am an undergrad at University of Washington with research focus on thermoelectric oxides. I came to UW to major in Materials Science & Engineering. In the Summer of 2012 I joined the Fumio/Marjorie research group. Since then I have been working on the synthesis of strontium barium niobate SrxBa1-xNb2O6 (SBN) and many characterizations of said material. I am also working on a characterization apparatus for Seebeck coefficient measurements. This apparatus is built upon a bell jar system under vacuum to create an inert testing environment.

An Dang
Kyle Staples

I am an undergraduate student at the University of Washington in the Material Science and Engineering department. Since the summer of 2012 I have been a part of this research group working with thermoelectric oxides. The research has involved the processing of Strontium Barium Niobate SrxBa1-xNb2O6 (SBN) and investigates the thermoelectric properties of the SBN material produced. Typical tasks carried out in this research include powder synthesis (through wet chemistry), pellet pressing, sintering, and reduction. Some typical characterization techniques utilized in this research have used XPS, XRD, EDX, and SEM. Currently the work I am doing focuses on inducing a charge carrier gradient in the SBN material by reduction followed by selective reoxidizing of part of the material.

Kyle Staples
Alex Locke

My name is Alex Locke. I grew up in the Seattle area and am currently a senior at the UW studying Materials Science and Engineering. I worked with Professor Ohuchi's associates this past summer in studying the effects of high density plasma impact with various materials. In my free time I enjoy outdoor sports and am interested in applying my MSE background towards research for advancements in equipment such as skis, snowboards, golf shafts, etc.

Alex Locke
Joshua Boquist

My name is Joshua Boquist and I am a Senior at the University of Washington studying Materials Science and Engineering. I grew up in Seattle and have always been active and adventurous. I enjoy wakeboarding, snowboarding, riding dirtbikes, snowmobiling, anything that gets my adrenaline flowing, traveling, and hunting. Over the summer of 2012 I joined Fumio Ohuchi's research group and familiarized myself with XPS characterization and thin film depositions. I then contributed by creating this website to inform others about the progress of the Fumio Ohuchi and Marjorie Olmstead research group.

Joshua Boquist
Kimbrelle Thommasson

I am an undergraduate at the University of Washington with a projected graduation date of June 2014. I began my time with the Ohuchi group in the summer of 2012, as part of the thermoelectric oxides group. I help with the creation of Strontium Barium Niobate, SrxBa1-xNb2O6 (SBN) powders through combustion synthesis. I am also working on measuring the thermal conductivity of SBN. In my free time I run, rock climb, knit, and read.

Kimbrelle
Thommasson
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

My name is Saleh Shaar. I am currently an undergraduate studying Material Science and Engineering here at the University of Washington. I am interested in the electronic properties of materials and their applications in energy storage and creation.

Saleh Shaar

Where Are The Graduates?