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研究成果 1991 2019

フィルター
記事
2019
1 引用 (Scopus)

Atomic-scale phonon scatterers in thermoelectric colusites with a tetrahedral framework structure

Suekuni, K., Shimizu, Y., Nishibori, E., Kasai, H., Saito, H., Yoshimoto, D., Hashikuni, K., Bouyrie, Y., Chetty, R., Ohta, M., Guilmeau, E., Takabatake, T., Watanabe, K. & Ohtaki, M., 1 1 2019, : : Journal of Materials Chemistry A. 7, 1, p. 228-235 8 p.

研究成果: ジャーナルへの寄稿記事

Chalcogenides
Thermal conductivity
Crystal structure
Sulfur
Defects

Electronic structure and thermoelectric properties of Sn1.2- xNb x Ti0.8S3 with a quasi-one-dimensional structure

Suekuni, K., Usui, H., Qiao, S., Hashikuni, K., Hirano, T., Nishiate, H., Lee, C. H., Kuroki, K., Watanabe, K. & Ohtaki, M., 5 7 2019, : : Journal of Applied Physics. 125, 17, 175111.

研究成果: ジャーナルへの寄稿記事

公開
ribbons
electronic structure
electrons
Seebeck effect
occupation
1 引用 (Scopus)

Thermoelectric Properties and Electronic Structures of CuTi 2 S 4 Thiospinel and Its Derivatives: Structural Design for Spinel-Related Thermoelectric Materials

Hashikuni, K., Suekuni, K., Usui, H., Chetty, R., Ohta, M., Kuroki, K., Takabatake, T., Watanabe, K. & Ohtaki, M., 1 22 2019, : : Inorganic Chemistry. 58, 2, p. 1425-1432 8 p.

研究成果: ジャーナルへの寄稿記事

structural design
thermoelectric materials
Structural design
spinel
Electronic structure
2018
3 引用 (Scopus)

Carrier concentration tuning in thermoelectric thiospinel Cu 2 CoTi 3 S 8 by oxidative extraction of copper

Hashikuni, K., Suekuni, K., Watanabe, K., Bouyrie, Y., Ohta, M., Ohtaki, M. & Takabatake, T., 3 1 2018, : : Journal of Solid State Chemistry. 259, p. 5-10 6 p.

研究成果: ジャーナルへの寄稿記事

Carrier concentration
Copper
Tuning
tuning
copper
2 引用 (Scopus)

Low Thermal Conductivity of RE-Doped SrO(SrTiO3)1 Ruddlesden Popper Phase Bulk Materials Prepared by Molten Salt Method

Putri, Y. E., Said, S. M., Refinel, R., Ohtaki, M. & Syukri, S., 9 1 2018, : : Electronic Materials Letters. 14, 5, p. 556-562 7 p.

研究成果: ジャーナルへの寄稿記事

Molten materials
Thermal conductivity
Salts
Phonon scattering
Seebeck coefficient
2016
1 引用 (Scopus)
tungsten oxides
Alkalies
iron oxides
Oxides
Tungsten
2014
25 引用 (Scopus)

Effects of morphology on the thermoelectric properties of Al-doped ZnO

Han, L., Van Nong, N., Zhang, W., Hung, L. T., Holgate, T., Tashiro, K., Ohtaki, M., Pryds, N. & Linderoth, S., 3 11 2014, : : RSC Advances. 4, 24, p. 12353-12361 9 p.

研究成果: ジャーナルへの寄稿記事

Platelets
Nanoparticles
Spark plasma sintering
Powders
Thermal conductivity
2013
8 引用 (Scopus)

Extremely low thermal conductivity in oxides with cage-like crystal structure

Ohtaki, M. & Miyaishi, S., 7 1 2013, : : Journal of Electronic Materials. 42, 7, p. 1299-1302 4 p.

研究成果: ジャーナルへの寄稿記事

Oxides
Cations
Thermal conductivity
thermal conductivity
Crystal structure
9 引用 (Scopus)

La doped effects on structure and thermoelectric properties of Sr 2 MnMoO 6 double-perovskite oxides

Sugahara, T., Ohtaki, M. & Suganuma, K., 1 1 2013, : : Journal of Asian Ceramic Societies. 1, 3, p. 282-288 7 p.

研究成果: ジャーナルへの寄稿記事

Perovskite
Oxides
Temperature
Rietveld refinement
Seebeck coefficient
7 引用 (Scopus)

Synthesis and self-assembly of gold nanoparticles by chemically modified polyol methods under experimental control

Viet Long, N., Ohtaki, M., Yuasa, M., Yoshida, S., Kuragaki, T., Minh Thi, C. & Nogami, M., 4 5 2013, : : Journal of Nanomaterials. 2013, 793125.

研究成果: ジャーナルへの寄稿記事

Polyols
Gold
Self assembly
Nanoparticles
Surface plasmon resonance
26 引用 (Scopus)

The influence of α- And γ-Al2O3 phases on the thermoelectric properties of Al-doped ZnO

Han, L., Nong, N. V., Hung, L. T., Holgate, T., Pryds, N., Ohtaki, M. & Linderoth, S., 4 5 2013, : : Journal of Alloys and Compounds. 555, p. 291-296 6 p.

研究成果: ジャーナルへの寄稿記事

Calcination
Doping (additives)
Microstructure
Spark plasma sintering
Grain growth
2012
9 引用 (Scopus)

Controlled synthesis and properties of palladium nanoparticles

Long, N. V., Hayakawa, T., Matsubara, T., Chien, N. D., Ohtaki, M. & Nogami, M., 1 1 2012, : : Journal of Experimental Nanoscience. 7, 4, p. 426-439 14 p.

研究成果: ジャーナルへの寄稿記事

Palladium
Nanoparticles
Ethylene Glycol
Ethylene glycol
Sodium Iodide
2 引用 (Scopus)
Platinum
Nanostructures
platinum
Nucleation
roughness
32 引用 (Scopus)

New experimental evidences of Pt-Pd bimetallic nanoparticles with core-shell configuration and highly fine-ordered nanostructures by high-resolution electron transmission microscopy

Nguyen, V. L., Ohtaki, M., Matsubara, T., Cao, M. T. & Nogami, M., 6 7 2012, : : Journal of Physical Chemistry C. 116, 22, p. 12265-12274 10 p.

研究成果: ジャーナルへの寄稿記事

High resolution transmission electron microscopy
Nanostructures
Nanoparticles
nanoparticles
transmission electron microscopy
23 引用 (Scopus)
Chemical engineering
Agglomeration
Nanoparticles
Nanostructures
Polymers
9 引用 (Scopus)

Sharp cubic and octahedral morphologies of poly(vinylpyrrolidone)-stabilised platinum nanoparticles by polyol method in ethylene glycol: Their nucleation, growth and formation mechanisms

Long, N. V., Chien, N. D., Hayakawa, T., Matsubara, T., Ohtaki, M. & Nogami, M., 3 1 2012, : : Journal of Experimental Nanoscience. 7, 2, p. 133-149 17 p.

研究成果: ジャーナルへの寄稿記事

Ethylene Glycol
Polyols
Ethylene glycol
Platinum
Nucleation
13 引用 (Scopus)

Structure and morphology of platinum nanoparticles with critical new issues of low- and high-index facets

Long, N. V., Ohtaki, M., Ngo, V. N., Cao, M. T. & Nogami, M., 1 1 2012, : : Advances in Natural Sciences: Nanoscience and Nanotechnology. 3, 2, 025005.

研究成果: ジャーナルへの寄稿記事

Platinum
Nanoparticles
Silver Nitrate
Direct methanol fuel cells (DMFC)
Polyols
12 引用 (Scopus)

Structure and thermoelectric properties of Ca 2-xSr xFeMoO 6 (0 ≤ x ≤ 0.3) double-perovskite oxides

Sugahara, T., Van Nong, N. & Ohtaki, M., 4 16 2012, : : Materials Chemistry and Physics. 133, 2-3, p. 630-634 5 p.

研究成果: ジャーナルへの寄稿記事

Perovskite
Oxides
oxides
Substitution reactions
Temperature
12 引用 (Scopus)

Structure and thermoelectric properties of double-perovskite oxides: Sr2-xKxFeMoO6

Sugahara, T., Araki, T., Ohtaki, M. & Suganuma, K., 1 1 2012, : : Journal of the Ceramic Society of Japan. 120, 1402, p. 211-216 6 p.

研究成果: ジャーナルへの寄稿記事

Perovskite
Oxides
oxides
Doping (additives)
Temperature
2011
50 引用 (Scopus)

A comparative study of Pt and Pt-Pd core-shell nanocatalysts

Long, N. V., Ohtaki, M., Hien, T. D., Randy, J. & Nogami, M., 10 30 2011, : : Electrochimica Acta. 56, 25, p. 9133-9143 11 p.

研究成果: ジャーナルへの寄稿記事

Nanoparticles
Nanoshells
Direct methanol fuel cells (DMFC)
Nanostructures
Electrocatalysis
45 引用 (Scopus)

Effects of heat treatment and poly(vinylpyrrolidone) (PVP) polymer on electrocatalytic activity of polyhedral Pt nanoparticles towards their methanol oxidation

Long, N. V., Ohtaki, M., Nogami, M. & Hien, T. D., 8 2011, : : Colloid and Polymer Science. 289, 12, p. 1373-1386 14 p.

研究成果: ジャーナルへの寄稿記事

Methanol
heat treatment
methyl alcohol
Heat treatment
Nanoparticles
172 引用 (Scopus)

Enhancement of the thermoelectric performance of p-type layered oxide Ca3Co4O9+δ through heavy doping and metallic nanoinclusions

Van Nong, N., Pryds, N., Linderoth, S. & Ohtaki, M., 6 3 2011, : : Advanced Materials. 23, 21, p. 2484-2490 7 p.

研究成果: ジャーナルへの寄稿記事

Oxides
Doping (additives)
High temperature testing
Heavy Ions
Heavy ions
14 引用 (Scopus)

Highly monodisperse cubic and octahedral rhodium nanocrystals: Their evolutions from sharp polyhedrons into branched nanostructures and surface-enhanced Raman scattering

Long, N. V., Chien, N. D., Hirata, H., Matsubara, T., Ohtaki, M. & Nogami, M., 4 1 2011, : : Journal of Crystal Growth. 320, 1, p. 78-89 12 p.

研究成果: ジャーナルへの寄稿記事

Rhodium
polyhedrons
rhodium
Nanocrystals
Raman scattering
17 引用 (Scopus)

High-temperature thermoelectric and microstructural characteristics of cobalt-based oxides with ga substituted on the Co-site

Nong, N. V., Yanagiya, S., Monica, S., Pryds, N. & Ohtaki, M., 5 1 2011, : : Journal of Electronic Materials. 40, 5, p. 716-722 7 p.

研究成果: ジャーナルへの寄稿記事

Cobalt
Oxides
Substitution reactions
cobalt
substitutes
77 引用 (Scopus)

High-temperature thermoelectric properties of late rare earth-doped Ca 3Co4O9+δ

Nong, N. V., Liu, C. J. & Ohtaki, M., 1 21 2011, : : Journal of Alloys and Compounds. 509, 3, p. 977-981 5 p.

研究成果: ジャーナルへの寄稿記事

Seebeck coefficient
Rare earths
Thermal conductivity
Solid state reactions
Oxides
18 引用 (Scopus)
cobalt oxides
transition metals
oxides
operating temperature
stabilization
16 引用 (Scopus)
Surface Morphology
Fuel Cell
fuel cells
Nanoparticles
Surface morphology
44 引用 (Scopus)

Synthesis and characterization of polyhedral Pt nanoparticles: Their catalytic property, surface attachment, self-aggregation and assembly

Long, N. V., Ohtaki, M., Uchida, M., Jalem, R., Hirata, H., Chien, N. D. & Nogami, M., 7 15 2011, : : Journal of Colloid And Interface Science. 359, 2, p. 339-350 12 p.

研究成果: ジャーナルへの寄稿記事

Surface properties
Agglomeration
Nanoparticles
Catalysts
Direct methanol fuel cells (DMFC)
113 引用 (Scopus)
Direct methanol fuel cells (DMFC)
fuel cells
Nanostructures
methyl alcohol
Nanoparticles
24 引用 (Scopus)

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

Long, N. V., Hien, T. D., Asaka, T., Ohtaki, M. & Nogami, M., 7 21 2011, : : Journal of Alloys and Compounds. 509, 29, p. 7702-7709 8 p.

研究成果: ジャーナルへの寄稿記事

Seed
Nucleation
Nanoparticles
Transmission electron microscopy
High resolution transmission electron microscopy
7 引用 (Scopus)

Thermoelectric properties and thermopower enhancement of Al-doped ZnO with nanosized pore structure

Ohtaki, M. & Araki, K., 1 1 2011, : : Journal of the Ceramic Society of Japan. 119, 1395, p. 813-816 4 p.

研究成果: ジャーナルへの寄稿記事

Phonon scattering
Thermoelectric power
Polymethyl Methacrylate
Pore structure
Thermal conductivity
2010
34 引用 (Scopus)

Chemical synthesis and characterization of palladium nanoparticles

Long, N. V., Nguyen, D. C., Hirata, H., Ohtaki, M., Hayakawa, T. & Nogami, M., 1 1 2010, : : Advances in Natural Sciences: Nanoscience and Nanotechnology. 1, 3, 035012.

研究成果: ジャーナルへの寄稿記事

Palladium
Nanoparticles
Povidone
Polyols
Ethylene Glycol
72 引用 (Scopus)

Improvement on the high temperature thermoelectric performance of Ga-doped misfit-layered Ca3Co4-xGaxO9+δ (x = 0, 0.05, 0.1, and 0.2)

Nong, N. V., Liu, C. J. & Ohtaki, M., 2 18 2010, : : Journal of Alloys and Compounds. 491, 1-2, p. 53-56 4 p.

研究成果: ジャーナルへの寄稿記事

Substitution reactions
Thermoelectric power
Hot pressing
Solid state reactions
Oxides
2009
243 引用 (Scopus)

High thermoelectric performance of dually doped ZnO ceramics

Ohtaki, M., Araki, K. & Yamamoto, K., 7 1 2009, : : Journal of Electronic Materials. 38, 7, p. 1234-1238 5 p.

研究成果: ジャーナルへの寄稿記事

Oxides
ceramics
oxides
Thermal conductivity
thermal conductivity
2008

Aサイト置換したダブルペロブスカイト型酸化物A₂B´MoO₆の熱電特性

菅原徹, 大瀧倫卓 & 相馬岳, 6 2008, : : 九州大学大学院総合理工学報告. 30, 1, p. 8-13 6 p.

研究成果: ジャーナルへの寄稿記事

25 引用 (Scopus)

Thermoelectric properties of double-perovskite oxide Sr2-xM xFeMoO6 [M = Ba, La)

Sugahara, T., Ohtaki, M. & Souma, T., 1 1 2008, : : Journal of the Ceramic Society of Japan. 116, 1360, p. 1278-1282 5 p.

研究成果: ジャーナルへの寄稿記事

Perovskite
Oxides
Doping (additives)
oxides
Seebeck coefficient
2006
13 引用 (Scopus)

Power factors of late rare earth-doped Ca3Co2O6 oxides

Nong, N. V. & Ohtaki, M., 8 1 2006, : : Solid State Communications. 139, 5, p. 232-234 3 p.

研究成果: ジャーナルへの寄稿記事

Oxides
Rare earths
Substitution reactions
rare earth elements
oxides
13 引用 (Scopus)

Synthesis and Rietveld analysis of Zn4 - XCdxSb 3 bulk crystals in the Zn-rich region

Souma, T. & Ohtaki, M., 3 9 2006, : : Journal of Alloys and Compounds. 413, 1-2, p. 289-297 9 p.

研究成果: ジャーナルへの寄稿記事

Rietveld analysis
Rietveld method
Crystals
Powders
Lattice constants
2005

Site-selective substitution by transition metal cations for NaCo 2O4 via ion-exchange

Nojiri, Y. & Ohtaki, M., 1 1 2005, : : Journal of the Ceramic Society of Japan. 113, 1318, p. 400-404 5 p.

研究成果: ジャーナルへの寄稿記事

Transition metals
Cations
Ion exchange
Substitution reactions
Positive ions

遷移金属カチオンを用いたイオン交換によるNaCo_2O_4のサイト選択元素置換

Nojiri, Y. & Ohtaki, M., 6 1 2005, : : Journal of the Ceramic Society of Japan. 113, 1318, p. 400-404 5 p.

研究成果: ジャーナルへの寄稿記事

Transition metals
Cations
Ion exchange
Substitution reactions
Ions
2001
64 引用 (Scopus)

Synthesis of TiO 2 /CdS nanocomposite via TiO 2 coating on CdS nanoparticles by compartmentalized hydrolysis of Ti alkoxide

Fujii, H., Inata, K., Ohtaki, M., Eguchi, K. & Arai, H., 1 1 2001, : : Journal of Materials Science. 36, 2, p. 527-532 6 p., 319928.

研究成果: ジャーナルへの寄稿記事

Hydrolysis
Nanocomposites
Nanoparticles
Coatings
Micelles
4 引用 (Scopus)

Threshold conditions for bulk second-order nonlinearity and near-surface second-order nonlinearity in thermally poled infrasil silica

Qiu, M., Mizunami, T., Shimomura, T. & Ohtaki, M., 1 1 2001, : : Optical Review. 8, 3, p. 159-162 4 p.

研究成果: ジャーナルへの寄稿記事

nonlinearity
silicon dioxide
thresholds
silica glass
ionic waves
2000
Oxides
Sintering
Microstructure
Seebeck coefficient
Crystallites
15 引用 (Scopus)

Intramolecularly selective decomposition of surfactant molecules on photocatalytic oxidative degradation over TiO2 photocatalyst

Ohtaki, M., Sato, H., Fujii, H. & Eguchi, K., 4 20 2000, : : Journal of Molecular Catalysis A: Chemical. 155, 1-2, p. 121-129 9 p.

研究成果: ジャーナルへの寄稿記事

Photocatalysts
Surface-Active Agents
Surface active agents
surfactants
degradation
24 引用 (Scopus)
Oxides
Sintering
Microstructure
Seebeck coefficient
Crystallites
1999
17 引用 (Scopus)

Thermoelectric properties and crystal chemistry of promising oxide candidate NaxCoO2

Ohtaki, M., 1999, : : Unknown Journal. p. 565-568 4 p.

研究成果: ジャーナルへの寄稿記事

Crystal chemistry
crystal chemistry
oxide
Oxides
transition element

Thermoelectric Properties of Chevrel-Type Sulfides AMo_6S_8 (A=Fe, Ni, Ag, Zn, Sn, Pb, Cu)

寄稿の翻訳されたタイトル: シェブレル型硫化物AMo_6S_8(A=Fe, Ni, Ag, Zn, Sn, Pb, Cu)の熱電特性坪田敏樹, 大瀧倫卓 & 江口浩一, 8 1 1999, : : 日本セラミックス協会学術論文誌 : Nippon Seramikkusu Kyokai gakujutsu ronbunshi. 107, 1248, p. 697-701 5 p.

研究成果: ジャーナルへの寄稿記事

Hole concentration
Seebeck coefficient
Sulfides
Temperature
Electric Conductivity
9 引用 (Scopus)

Thermoelectric properties of chevrel-type sulfides AMo6S8 (A=Fe, Ni, Ag, Zn, Sn, Pb, Cu)

Tsubota, T., Ohtaki, M. & Eguchi, K., 1 1 1999, : : Journal of the Ceramic Society of Japan. 107, 8, p. 697-701 5 p.

研究成果: ジャーナルへの寄稿記事

Sulfides
sulfides
Hole concentration
Seebeck coefficient
room temperature