Makoto Takeo
Professor Emeritus of Physics

Office Phone: N/A

Office Location: Science Building 1

Email: takeom@pdx.edu

Research Interests

Dr. Takeo's studies of optical spectra in hot, dense gases have significance for the development of advanced energy technologies, including magnetohydrodynamic and fusion devices. Central to the experimental work in this area is a ballistic compressor capable of generating gas pressures of up to 2000 atmospheres and temperatures of 6000 Kelvin. Diagnosis of hot, dense gases is very important in improving combustion processes.

A related set of studies, with Dr. John Dash, focuses on the erosion as well as improvement of useable characteristics of metallic surfaces exposed to very hot, dense gases. In energy production, erosion of material used in the equipment very often causes problems. Theoretical research being undertaken by Dr. Takeo is related both to the physics of the compressor itself and to the pressure broadening of spectral lines in high density gases.

A recent work has been to write a well-received textbook on disperse systems.

Selected Publications

Disperse Systems. Wiley-VCH Publishers.

Disperse Systems in Encyclopedia of Applied Physics, Vol. 5, pp. 87-99. VCH Publishers, Inc., 1993.

Formation of Superhexagonal Chromium Hydride by Exposure of Chromium Thin Films to High Temperature, High Pressure Hydrogen in a Ballistic Compressor. M. Takeo, Y. Pan and J. Dash, Int. J. Hydrogen Energy 18 (1993).

Electrostatic Surface Potential of a Lipid Monolayer Containing Slightly Soluble Molecules. M. Takeo, J. Colloid and Interface Science 157:291-296 (1993).

Formation of Iron Hydride in Iron Foil Exposed to a Hot, Dense Gas Mixture of Argon and Hydrogen. M. Takeo, J. Dash, A.M. Kasaaian, A. Trzynka and W.A. Lanford, International J. Hydrogen Energy (October 1992).

Enhancement of Tc of Bi-Sr-Ca-Cu-O Superconductor by Rapid Heating and Cooling in a Ballistic Compressor. Q. Duan, J. Dash, M. Takeo and J. Huang, J. Appl Phys. 69:4997 (1991).

Streaks in Electron Diffraction of Cr Foils Exposed to Hot, Dense Hydrogen. M. Takeo and Y. Pan, Proceedings of 10th International Conference on High Energy Rate Fabrication, Ljubljana, Yugoslavia, September 1989.

Effects of a Mixture of Hot, Dense H2 and Ar on the Structure and Composition of Iron. M. Takeo, J. Dash, A. Kasaaian and A. Trzynka, Proc. of 9th International Conference on High Energy Rate Fabrication in Novosibirsk, USSR, August 1986 .

Thermodynamic Conditions of the Test Gas in a Ballistic Compressor. M. Takeo, N.A. Holmes and S.Y. Ch'en, J. Appl. Phys. 38:3544 (1967).