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Researcher information
Michitaka Ohtaki Last modified date：2013.6.10

Associate Professor / Solid and Surface Science
Department of Energy and Material Sciences
Faculty of Engineering Sciences


Graduate School
Department of Molecular and Material Sciences
Interdisciplinary Graduate School of Engineering Sciences
Undergraduate School
Department of Energy Science and Engineering
School of Engineering
Other Organization
Research Center for Synchrotron Light Applications


E-Mail
Homepage
[URL]
Homepage of Ohtaki Lab..
Phone
092-583-8835
Fax
092-583-8835
Academic Degree
Doctor of Engineering
Field of Specialization
Applied Physical Chemistry, Inorganic Materials Chemistry
Research
Research Interests
  • Oxide thermoelectric materials for recuperating unused waste heat energy
    keyword : thermoelectric material, oxide semiconductor, energy conversion material, conductive ceramics, thermal conductivity, zinc oxide
    1991.07.
  • Development of oxide thermoelectric modules for mid-to-high temperature waste heat recovery
    keyword : zinc oxide, layered cobalt oxide, microstructure control, long-term stability assessment
    2002.11.
  • Self-assembly synthesis and properties of inorganic nanomaterials with low-dimensional quantum confinement structures
    keyword : low-dimensional nanomaterial, molecular assembly, self-assembly, nano-superlattice, photocatalyst, magnetism, inorganic-organic hybrid
    1996.04.
Current and Past Project
  • "Development of Thermoelectric Power Generator Modules for 500C-Class Waste Heat Recovery (Ohtaki Project)" Project Director: Michitaka Ohtaki (Kyushu Univ.)
    "Science and Technology Incubation Program in Advanced Region" at Innovation Plaza Fukuoka, sponsored by Japan Science and Technology Agency (JST)
  • "Creation of Thermoelectric Oxide Materials with Layered Structures through Nano-Block Integration" Research Director: Prof. K. Koumoto (Nagoya Univ.)
    Leader of Kyushu University Group: Michitaka Ohtaki
    "Development of Advanced Nanostructured Materials for Energy Conversion and Storage" Research Area; Research Supervisor: Akira Fujishima
    Proposal-Oriented Type Research, Core Research for Evolutional Science and Technology(CREST-Type) of JST Basic Research, sponsored by Japan Science and Technology Agency (JST)
Academic Activities
Books
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1. Ed. D. M. Rowe,Thermoelectrics Handbook: macro to nano,CRC Press,ISBN: 0-8493-2264-2, pp.35-1～35-15,2006.01. .
2. Ed. K. Koumoto, I. Terasaki, N. Murayama,Oxide Thermoelectrics,Research Signpost,ISBN 81-7736-100-7, pp. 159-180.,2002.12. .
Reports
 Show All Reports >>
1. Michitaka Ohtaki,Recent Aspects of Oxide Thermoelectric Materials for Power Generation from Mid-to-high Temperature Heat Source,119 (11), 770-775,Journal of the Ceramic Society of Japan,2011.11. .
Papers
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1. Li Han, Ngo Van Nong, Le Thanh Hung, Nini Pryds, Michitaka Ohtaki, Søren Linderoth,The Influence of α- and γ-Al2O3 Phases on the Thermoelectric Properties of Al-doped ZnO
,Journal of Alloys and Compounds,Vol.555,2013.04. .
2. Michitaka Ohtaki, So Miyaishi,Extremely Low Thermal Conductivity in Oxides with Cage-like Crystal Structure
,Journal of Electronic Materials,Vol.42,2013.01. .
3. Nguyen Viet Long, Masayuki Nogami, Cao Minh Thi, Michitaka Ohtaki,Experimental Evidences of Crystal Nucleation and Growth of Platinum Nanoparticles with Most Characteristic Roughness Heteromorphologies and Nanostructures from Homogeneous Solution,Journal of Advanced Microscopy Research,Vol.7,2012.09. .
4. Nguyen Viet Long, Michitaka Ohtaki, Takashi Matsubara, Cao Minh Thi, Masayuki Nogami,New Experimental Evidences of Pt-Pd Bimetallic Nanoparticles with Core-Shell Configuration and Highly Fine-ordered Nanostructures by High-Resolution Electron Transmission Microscopy,The Journal of Physical Chemistry C,Vol.116,No.22,2012.06. .
5. Nguyen Viet Long, Cao Minh Thi, Masayuki Nogami, Michitaka Ohtaki,Novel Issues of Morphology, Size, and Structure of Pt Nanoparticles in Chemical Engineering: Surface Attachment, Aggregation or Agglomeration, Assembly, and Structural Changes,New Journal of Chemistry,2012.06. .
6. Tohru Sugahara, Teppei Araki, Michitaka Ohtaki, Katsuaki Suganuma,Structure and Thermoelectric Properties of Double-perovskite Oxides: Sr2-xKxFeMoO6,Journal of the Ceramic Society of Japan,Vol.120,No.6,pp.211-216,2012.06. .
7. Tohru Sugahara, Ngo Van Nong, Michitaka Ohtaki,Structure and Thermoelectric Properties of Ca2-xSrxFeMoO6 (0 ≤ x ≤ 0.3) Double-perovskite Oxides,Materials Chemistry and Physics,Vol.133,No.2-3,pp.630-634,2012.04. .
8. Nguyen Viet Long, Nguyen Duc Chien, Tomokatsu Hayakawa, Takashi Matsubara, Michitaka Ohtaki, Masayuki Nogami,Sharp Cubic and Octahedral Morphologies of Poly(vinylpyrrolidone)-stabilised Platinum Nanoparticles by Polyol Method in Ethylene Glycol: Their Nucleation, Growth and Formation Mechanisms,Journal of Experimental Nanoscience,Vol.7,No.2,pp.133-149,2012.03. .
9. Michitaka Ohtaki, Kazuhiko Araki,Thermoelectric Properties and Thermopower Enhancement of Al-doped ZnO with Nanosized Pore Structure,Journal of the Ceramic Society of Japan,Vol.119,No.11,pp.813-816,2011.11. .
10. Nguyen Viet Long, Michitaka Ohtaki, Tong Duy Hien, Jalem Randy, Masayuki Nogami,Synthesis and Characterization of Polyhedral and Quasi-sphere Non-polyhedral Pt Nanoparticles: Effects of Their Various Surface Morphologies and Sizes on Electrocatalytic Activity for Fuel Cell Applications,Journal of Nanoparticle Research,Vol.13,No.10,pp.5177-5191,2011.10. .
11. Nguyen Viet Long, Michitaka Ohtaki, Tong Duy Hien, Jalem Randy, Masayuki Nogami,A Comparative Study of Pt and Pt-Pd Core-shell Nanocatalysts,Electrochimica Acta,Vol.56,No.25,pp.9133-9143,2011.10. .
12. Nguyen Viet Long, Michitaka Ohtaki, Masayuki Nogami, Tong Duy Hien,Effects of Heat Treatment and Poly(vinylpyrrolidone) (PVP) Polymer on Electrocatalytic Activity of Polyhedral Pt Nanoparticles towards their Methanol Oxidation,Colloid and Polymer Science,Vol.289,No.12,pp.1373-1386,2011.08. .
13. Tohru Sugahara, Michitaka Ohtaki,Structural and Semiconductor-to-metal Transitions of Double-perovskite Cobalt Oxide Sr2-xLaxCoTiO6-d with Enhanced Thermoelectric Capability,Applied Physics Letters,Vol.99,No.6,pp.062107,2011.08. .
14. Nguyen Viet Long, Michitaka Ohtaki, Masaya Uchida, Randy Jalem, Hirohito Hirata, Nguyen Duc Chien, Masayuki Nogami,Synthesis and Characterization of Polyhedral Pt Nanoparticles: Their Catalytic Property, Surface Attachments, Self-aggregation and Assembly,Journal of Colloid and Interface Science,Vol.359,No.2,pp.339-350,2011.07. .
15. Nguyen Viet Long, Masaya Uchida, Jalem Randy, Hirohito Hirata, Nguyen Duc Chien, Michitaka Ohtaki, Masayuki Nogami,Synthesis and Characterization of Pt-Pd Alloy and Core-shell Bimetallic Nanoparticles for Direct Methanol Fuel Cells (DMFCs): Enhanced Electrocatalytic Properties of Well-shaped Core-shell morphologies and Nanostructures,International Journal of Hydrogen Energy,Vol.36,No.14,pp.8478-8491,2011.07. .
16. Nguyen Viet Long, Tong Dui Hien, Toru Asaka, Michitaka Ohtaki, Masayuki Nogami,Synthesis and Characterization of Pt-Pd Nanoparticles with Core-shell morphology: Nucleation and Overgrowth of the Pd Shells on the as-prepared and Defined Pt Seeds,Journal of Alloys and Compounds,Vol.509,No.29,pp.7702-7709,2011.07. .
17. Ngo Van Nong, Nini Pryds, Soren Linderoth, Michitaka Ohtaki,Enhancement of the Thermoelectric Performance of p-Type Layered Oxide Ca3Co4O9+d Through Heavy Doping and Metallic Nanoinclusions,Advanced Materials,Vol.23,No.21,pp.2484-2490,2011.06. .
18. Ngo Van Nong, Syun-ichi. Yanagiya, Sonne Monica, Nini Pryds, Michitaka Ohtaki,High-Temperature Thermoelectric and Microstructural Characteristics of Cobalt-Based Oxides with Ga Substituted on the Co-Site,Journal of Electronic Materials,Vol.40,No.5,pp.716-722,2011.05. .
19. N. V. Nong, C.-J. Liu, M. Ohtaki,High Temperature Thermoelectric Properties of Late Rare Earth-doped Ca3Co4-xGaxO9+d
,J. Alloy Compd.,Vol.509,pp.977-981,2011.01. .
20. N. V. Nong, C.-J. Liu, M. Ohtaki,Improvement on the High Temperature Thermoelectric Performance of Ga-doped Misfit-layered Ca3Co4-xGaxO9+d (x = 0, 0.05, 0.1, and 0.2),J. Alloy Compd.,Vol.491,No.1-2,pp.53-56,2010.01. .
21. M. Ohtaki, K. Araki, K. Yamamoto,High Thermoelectric Performance of Dually Doped ZnO Ceramics,Journal of Electronic Materials,Vol.38,pp.1234-1238,2009.06. .
22. T. Sugahara, M. Ohtaki, T. Souma,Thermoelectric Properties of Double-perovskite Oxide Sr2-xMxFeMoO6 (M = Ba, La),J. Ceram. Soc. Jpn.,116 (12), 1278-1282,2008.12. .
23. T. Souma, D. Isobe, M. Ohtaki,Synthesis and Rietveld Analysis of New Thermoelectric Oxides F-doped Na1.6Co2O4,Trans. Mater. Res. Soc. Jpn.,33 (4), 897-901,2008.06. .
24. T. Souma, M. Ohtaki, K. Ohnishi, M. Shigeno , Y. Ohba, N. Nakamura, T. Shimozaki,Power Generation Characteristics of Oxide Thermoelectric Modules Incorporating Nanostructured ZnO Sintered Materials,Proc. 26th Int. Conf. Thermoelectrics,pp. 38-41,2008.04. .
25. M. Ohtaki, R. Hayashi, K. Araki,Thermoelectric Properties of Sintered ZnO Incorporating Nanovid Structure: Influence of the Size and Number Density of Nanovoids,Proc. 26th Int. Conf. Thermoelectrics,pp. 112-116,2008.04. .
26. T. Souma, M. Ohtaki, M. Shigeno, Y. Ohba, N. Nakamura, T. Shimozaki,Jointing Technique and Power Generation Characteristics of p-NaCo2O4/n-ZnO Oxide Thermoelectric Modules,Trans. Mater. Res. Soc. Jpn.,32(3), 701-704,2007.06. .
27. T. Souma, M. Ohtaki, M. Shigeno, Y. Ohba, N. Nakamura, T. Shimozaki,Fabrication and Power Generation Characteristics of p-NaCo2O4/n-ZnO Oxide Thermoelectric Modules,Proc. 25th Int. Conf. Thermoelectrics,pp.603-606.,2006.11. .
28. M. Ohtaki, R. Hayashi,Enhanced Thermoelectric Performance of Nanostructured ZnO: A possibility of Selective Phonon Scattering and Carrier Energy Filtering by Nanovoid Structure,Proc. 25th Int. Conf. Thermoelectrics,pp.276-279.,2006.11. .
29. N. V. Nong, M. Ohtaki,Power Factors of Late Rare Earth-doped Ca3Co2O6 Oxides,Solid State Commun.,139(5), 232-234.,2006.08. .
30. H. Hirobe, M. Ohtaki,Enhanced Phonon Scattering by Oxygen Defects in Metal Oxides,Trans. Mater. Res. Soc. Jpn.,31(2), 403-406.,2006.06. .
31. N. V. Nong, M. Ohtaki,High-temperature Thermoelectric properties of Late Rare Earth-doped Ca3Co2O6,Trans. Mater. Res. Soc. Jpn.,31(2), 399-402,2006.06. .
32. T. Souma, M. Ohtaki,Synthesis and Rietveld Analysis of Zn4-xCdxSb3 Bulk Crystals in the Zn-rich Region,J. Alloy. Compd.,413, 289-297,2006.03. .


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