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Materials Science

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56
Citations
10482
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8306
National Ranking
475

Overview

Takumi Kikegawa is affiliated with the High Energy Accelerator Research Organization in Japan, focusing on research in materials science and earth and planetary sciences. Their work spans several subfields, including geophysics, materials chemistry, physical and theoretical chemistry, condensed matter physics, and catalysis.

Their research primarily addresses topics such as high-pressure geophysics and materials, hydrogen storage and materials, crystallography and molecular interactions, geological and geochemical analysis, crystal structures and properties, boron and carbon nanomaterials research, and advanced NMR techniques and applications.

Takumi Kikegawa has published in several scientific venues, with multiple contributions to Inorganic Chemistry. Other publication venues include American Mineralogist, The Journal of Chemical Physics, Hyperfine Interactions, and The Journal of Physical Chemistry B.

Their recent papers include the following:

  • Phase Diagram Analysis of High-Pressure/High-Temperature Polymorphs of Ammonia Borane, 2024, Inorganic Chemistry
  • Influence of pressure-induced formation of dihydrogen bonds on lattice parameters, volume, and vibrational modes of ammonia borane, 2022, The Journal of Chemical Physics
  • Observation of Dihydrogen Bonds in High-Pressure Phases of Ammonia Borane by X-ray and Neutron Diffraction Measurements, 2021, Inorganic Chemistry
  • P-V-T equation of state of hydrous phase A up to 10.5 GPa, 2020, American Mineralogist
  • Pressure-Induced Dehydration and Reversible Recrystallization of Dihydrogen-Bonded Sodium Borohydride Dihydrate NaBH4·2H2O, 2025, Inorganic Chemistry

Frequent collaborators of Kikegawa include:

  • Satoshi Nakano
  • Hiroshi Fujihisa
  • Hiroshi Yamawaki
  • Asami Sano-Furukawa
  • Takanori Hattori

Their body of work significantly engages with high-pressure experimental methodologies and theoretical analyses to explore molecular interactions and phase behavior under extreme conditions. The focus on materials related to ammonia borane and borohydrides reflects a sustained interest in hydrogen storage materials and their physicochemical properties.

Overall, Takumi Kikegawa's research contributes to advancing understanding in the interplay between pressure, structure, and bonding in complex chemical systems relevant to both fundamental science and practical applications in energy materials.

Best Publications

  • High-pressure in situ x-ray-diffraction study of the phase transformation from graphite to hexagonal diamond at room temperature.

    Takehiko Yagi;Wataru Utsumi;Masa-aki Yamakata;Takumi Kikegawa

  • Baddeleyite-Type High-Pressure Phase of TiO2.

    H. Sato;S. Endo;M. Sugiyama;T. Kikegawa

  • The Phase Boundary Between α- and β-Mg2SiO4 Determined by in Situ X-ray Observation

    H. Morishima;Takumi Kato;M. Suto;E. Ohtani

  • Phase relations of CaCO3 at high pressure and high temperature

    Kaichi Suito;Junpei Namba;Takashi Horikawa;Yozo Taniguchi

  • A high-pressure and high-temperature synthesis of platinum carbide

    Shigeaki Ono;Takumi Kikegawa;Yasuo Ohishi

  • Application of an imaging plate to high‐pressure x‐ray study with a diamond anvil cell (invited)

    O. Shimomura;K. Takemura;H. Fujihisa;Y. Fujii

  • Phase relations and equations of state of ZrO 2 under high temperature and high pressure

    O. Ohtaka;H. Fukui;T. Kunisada;T. Fujisawa

  • Post-aragonite phase transformation in CaCO3 at 40 GPa

    Shigeaki Ono;Takumi Kikegawa;Yasuo Ohishi;Jun Tsuchiya

  • In situ determination of the phase boundary between Wadsleyite and Ringwoodite in Mg2SiO4

    Akio Suzuki;Eiji Ohtani;Hideaki Morishima;Tomoaki Kubo

  • High-pressure transition of CaCO3

    Shigeaki Ono;Shigeaki Ono;Takumi Kikegawa;Yasuo Ohishi

  • An in situ X ray diffraction study of the kinetics of the Ni2SiO4 olivine‐spinel transformation

    D. C. Rubie;Y. Tsuchida;T. Yagi;W. Utsumi

  • Aluminous hydrous mineral δ-AlOOH as a carrier of hydrogen into the core-mantle boundary

    Asami Sano;Asami Sano;Eiji Ohtani;Tadashi Kondo;Naohisa Hirao

  • Synthesis, Thermal Stability and Properties of ZnO2 Nanoparticles

    W. Chen;Y. H. Lu;M. Wang;L. Kroner

  • Measurements of x‐ray diffraction for liquid metals under high pressure

    Kazuhiko Tsuji;Kenichi Yaoita;Motoharu Imai;Osamu Shimomura

  • Evidence for molecular dissociation in bromine near 80 GPa.

    Y. Fujii;K. Hase;Y. Ohishi;H. Fujihisa

  • Thermal expansivity of MgSiO3 perovskite under high pressures up to 20 GPa

    Wataru Utsumi;Nobumasa Funamori;Takehiko Yagi;Eiji Ito

  • High-pressure phase transition of hematite, Fe2O3

    Shigeaki Ono;Takumi Kikegawa;Yasuo Ohishi

  • Plagioclase breakdown as an indicator for shock conditions of meteorites

    Tomoaki Kubo;Makoto Kimura;Takumi Kato;Masayuki Nishi

  • Exploratory studies of silicate melt structure at high pressures and temperatures by in situ X‐ray diffraction

    Nobumasa Funamori;Shino Yamamoto;Takehiko Yagi;Takumi Kikegawa

  • Fe‐Mg partitioning between (Mg, Fe)SiO3 post‐perovskite, perovskite, and magnesiowüstite in the Earth's lower mantle

    Yusuke Kobayashi;Tadashi Kondo;Eiji Ohtani;Naohisa Hirao

  • Phase transitions of (Mg,Fe)O at megabar pressures

    Tadashi Kondo;Eiji Ohtani;Naohisa Hirao;Takehiko Yagi

Frequent Co-Authors

Eiji Ohtani
Eiji Ohtani Tohoku University
Takehiko Yagi
Takehiko Yagi University of Tokyo
Shigeaki Ono
Shigeaki Ono Japan Agency for Marine-Earth Science and Technology
Osamu Shimomura
Osamu Shimomura Marine Biological Laboratory
Akio Suzuki
Akio Suzuki Tohoku University
Ken-ichi Funakoshi
Ken-ichi Funakoshi Comprehensive Research Organization for Science and Society
Toru Inoue
Toru Inoue Hiroshima University
Tetsuo Irifune
Tetsuo Irifune Ehime University
Yasuhiko Syono
Yasuhiko Syono Tohoku University
Nagayoshi Sata
Nagayoshi Sata Japan Agency for Marine-Earth Science and Technology

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