Kosuke Hiroi - My portal

Profile Information

Affiliation: Japan Atomic Energy Agency

J-GLOBAL ID: 202101013418370830
researchmap Member ID: R000017406

Research Areas

Nanotechnology/Materials / Nanomaterials /

Papers

Effects of Fe ions, ultraviolet irradiation, and heating on microscopic structures of black lacquer films

Nankawa Takuya, Sekine Yurina, Matsumura Daiju, Hiroi Kosuke, Takata Shinichi, Kamiya Yoshimi*, Honda Takayuki*

Langmuir, 40(11) 5725-5730, Mar, 2024 Peer-reviewed
Contrast dependence of scattering profiles for poly(ethylene glycol) in water; Investigation by small-angle neutron scattering with $^{3}$He spin filter and small-angle X-ray scattering

Ryoki Akiyuki*, Watanabe Fumi*, Okudaira Takuya*, Takahashi Shingo*, Oku Takayuki, Hiroi Kosuke, Motokawa Ryuhei, Nakamura Yo*

Journal of Chemical Physics, 160(11) 114907\_1-114907\_9, Mar, 2024 Peer-reviewed
Nanocellulose hydrogels formed via crystalline transformation from cellulose I to II and subsequent freeze cross-linking reaction

Sekine Yurina, Nankawa Takuya, Hiroi Kosuke, Oba Yojiro*, Nagakawa Yoshiyasu*, Sugita Tsuyoshi, Shibayama Yuki, Ikeda-Fukazawa Tomoko*

Carbohydrate Polymers, 327 121538\_1-121538\_11, Mar, 2024 Peer-reviewed
Development of a D$_2$O/H$_2$O vapor generator for contrast-variation neutron scattering

Arima-Osonoi Hiroshi*, Takata Shinichi, Kasai Satoshi*, Ouchi Keiichi*, Morikawa Toshiaki*, Miyata Noboru*, Miyazaki Tsukasa*, Aoki Hiroyuki, Iwase Hiroki*, Hiroi Kosuke …

Journal of Applied Crystallography, 56(6) 1802-1812, Dec, 2023 Peer-reviewed
Upgrade of the small-angle neutron scattering diffractometer SANS-J at JRR-3

Kumada Takayuki, Motokawa Ryuhei, Oba Yojiro, Nakagawa Hiroshi, Sekine Yurina, Micheau C., Ueda Yuki, Sugita Tsuyoshi, Birumachi Atsushi, Sasaki Miki …

Journal of Applied Crystallography, 56(6) 1776-1783, Dec, 2023 Peer-reviewed
Polarized neutrons observed nanometer-thick crystalline ice plates in frozen glucose solution

Kumada Takayuki, Nakagawa Hiroshi, Miura Daisuke, Sekine Yurina, Motokawa Ryuhei, Hiroi Kosuke, Inamura Yasuhiro, Oku Takayuki, Oishi Kazuki*, Morikawa Toshiaki* …

Journal of Physical Chemistry Letters (Internet), 14(34) 7638-7643, Aug, 2023 Peer-reviewed
Dynamic exchange of amphiphilic random copolymers between micelles in water; Kinetics and mechanism analyzed by TR-SANS

Hibino Masayuki*, Takata Shinichi, Hiroi Kosuke, Aoki Hiroyuki, Terashima Takaya*

Macromolecules, 56(8) 2955-2964, Apr, 2023 Peer-reviewed
Sodium diffusion in hard carbon studied by small- and wide-angle neutron scattering and muon spin relaxation

Oishi Kazuki*, Igarashi Daisuke*, Tatara Ryoichi*, Kawamura Yukihiko*, Hiroi Kosuke, Suzuki Junichi*, Umegaki Izumi*, Nishimura Shoichiro*, Koda Akihiro*, Komaba Shinichi* …

Journal of Physics; Conference Series, 2462 012048\_1-012048\_5, Mar, 2023 Peer-reviewed
Polarized neutron scattering study of hollow Fe$_{3}$O$_{4}$ submicron spherical particles

Kobayashi Satoru*, Nomura Eiji*, Chiba Momoko*, Kawamura Yukihiko*, Oishi Kazuki*, Hiroi Kosuke, Suzuki Junichi*

Journal of Magnetism and Magnetic Materials, 569 170410\_1-170410\_9, Mar, 2023 Peer-reviewed
Magnetic structural analysis of nanocrystalline soft magnets by small-angle neutron scattering

Mamiya Hiroaki*, Oba Yojiro, Hiroi Kosuke, Miyatake Takayuki*, Gautam R.*, Sepehri-Amin H.*, Okubo Tadakatsu*

IEEE Magnetics Letters, 14 7100105\_1-7100105\_5, Feb, 2023 Peer-reviewed
Microscopic structural changes during the freeze cross-linking reaction in carboxymethyl cellulose nanofiber hydrogels

Miura Daisuke*, Sekine Yurina, Nankawa Takuya, Sugita Tsuyoshi, Oba Yojiro, Hiroi Kosuke, Ozawa Tatsuhiko

Carbohydrate Polymer Technologies and Applications (Internet), 4 100251\_1-100251\_9, Dec, 2022 Peer-reviewed
Magnetization process of cubic Fe$_3$O$_4$ submicron particles studied by polarized small-angle neutron scattering

Nomura Eiji*, Chiba Momoko*, Matsuo Sakoto*, Noda Chiaki*, Kobayashi Satoru*, Manjanna J.*, Kawamura Yukihiko*, Oishi Kazuki*, Hiroi Kosuke, Suzuki Junichi*

AIP Advances (Internet), 12(3) 035034\_1-035034\_5, Mar, 2022 Peer-reviewed
Strain distribution visualization of punched electrical steel sheets using neutron Bragg-edge transmission imaging

Sasada Seiji*, Takahashi Yoshihito*, Takeuchi Keisuke*, Hiroi Kosuke, Su Y. H., Shinohara Takenao, Watanabe Kenichi*, Uritani Akira*

Japanese Journal of Applied Physics, 61(4) 046004\_1-046004\_8, Mar, 2022 Peer-reviewed
Spontaneous formations of nanoconfined water in ionic liquids by small-angle neutron scattering

Abe Hiroshi*, Nemoto Fumiya*, Hiroi Kosuke, Oishi Kazuki*, Takata Shinichi

Journal of Molecular Liquids, 346 117035\_1-117035\_6, Jan, 2022 Peer-reviewed
High-spatial-resolution measurement of magnetization distribution using polarized neutron imaging

Sasada Seiji*, Hiroi Kosuke, Osanai Kenta*, Shinohara Takenao, Watanabe K.*, Uritani Akira*

Japanese Journal of Applied Physics, 60(12) 126003\_1-126003\_6, Dec, 2021 Peer-reviewed
Development of spin-contrast-variation neutron powder diffractometry for extracting the structure factor of hydrogen atoms

Miura Daisuke*, Kumada Takayuki, Sekine Yurina, Motokawa Ryuhei, Nakagawa Hiroshi, Oba Yojiro, Ohara Takashi, Takata Shinichi, Hiroi Kosuke, Morikawa Toshiaki* …

Journal of Applied Crystallography, 54(2) 454-460, Apr, 2021 Peer-reviewed
Polarization analysis for small-angle neutron scattering with a $^{3}$He spin filter at a pulsed neutron source

Okudaira Takuya, Ueda Yuki, Hiroi Kosuke, Motokawa Ryuhei, Inamura Yasuhiro, Takata Shinichi, Oku Takayuki, Suzuki Junichi*, Takahashi Shingo*, Endo Hitoshi* …

Journal of Applied Crystallography, 54(2) 548-556, Apr, 2021 Peer-reviewed
Study of neutron-nuclear spin correlation term with a polarized Xe target

Sakai Kenji, Oku Takayuki, Okudaira Takuya, Kai Tetsuya, Harada Masahide, Hiroi Kosuke, Hayashida Hirotoshi*, Kakurai Kazuhisa*, Shimizu Hirohiko*, Hirota Katsuya* …

JPS Conference Proceedings (Internet), 33 011116\_1-011116\_6, Mar, 2021 Peer-reviewed
Structural investigation of sulfonated polyphenylene ionomers for the design of better performing proton-conductive membranes

Shiino Keisuke*, Otomo Toshiya, Yamada Takeshi*, Arima Hiroshi*, Hiroi Kosuke, Takata Shinichi, Miyake Jumpei*, Miyatake Kenji*

ACS Applied Polymer Materials (Internet), 2(12) 5558-5565, Nov, 2020 Peer-reviewed
Development and application of a $^3$He neutron spin filter at J-PARC

Okudaira Takuya, Oku Takayuki, Ino Takashi*, Hayashida Hirotoshi*, Kira Hiroshi*, Sakai Kenji, Hiroi Kosuke, Takahashi Shingo*, Aizawa Kazuya, Endo Hitoshi* …

Nuclear Instruments and Methods in Physics Research A, 977 164301\_1-164301\_8, Oct, 2020 Peer-reviewed

Misc.

Development of spin-contrast-variation neutron powder diffractometry for extracting the structure factor of hydrogen atoms

Miura Daisuke*, Kumada Takayuki, Sekine Yurina, Oku Takayuki, Takata Shinichi, Hiroi Kosuke, Iwata Takahiro*

J-PARC MLF Annual Report 2021, 6-7, Mar, 2022
Visualization technique with the energy-resolved neutron imaging system, RADEN

Kai Tetsuya, Shinohara Takenao, Hiroi Kosuke, Su Y. H., Oikawa Kenichi

Hihakai Kensa, 67(5) 209-216, May, 2018
Optimization of the magnetic field environment in the polarization analysis system of BL22 "RADEN" at J-PARC/MLF (Contract research)

Hiroi Kosuke, Shinohara Takenao, Hayashida Hirotoshi*, Su Y. H., Kai Tetsuya, Oikawa Kenichi

JAEA-Technology 2016-021, 14, Oct, 2016

Presentations

Current status of MLF BL15 TAIKAN and its application to studies of metallic materials

Hiroi Kosuke

日本鉄鋼協会フォーラム「量子ビーム技術による組織形成機構の理解」勉強会
Magnetic imaging of magnetic materials and industrial products using pulsed polarized neutrons

Hiroi Kosuke, Shinohara Takenao, Hayashida Hirotoshi*

第60回X線材料強度に関する討論会; テーマ「電動化社会に向けた強度・非破壊評価における研究開発と技術課題」
The Effect of Zr addition on oxide particle morphology in ODS-Cu

Saito Toshiki*, Yu H.*, Inoue Koji*, Zimo G.*, Kondo Sosuke*, Nagai Yasuyoshi*, Oba Yojiro, Hiroi Kosuke, Kasada Ryuta*

21st International Conference on Fusion Reactor Materials (ICFRM-21)
Current status of small- and ultra-small-angle neutron scattering measurement performance of MLF BL15 TAIKAN

Hiroi Kosuke, Takata Shinichi

日本中性子科学会第23回年会(JSNS2023)
Neutron scattering study on Li$_{2}$(Li$_{1-x}$Fe$_{x}$)N displaying single molecule magnet behavior

Kofu Maiko, Jesche A.*, Breitner F.*, H\"ohn P.*, Kawamura Seiko, Nakajima Kenji, Hiroi Kosuke, Oishi Kazuki*, Kawamura Yukihiko*

日本物理学会第78回年次大会(2023年)
Nano-ice crystals in rapidly cooled sugar solutions observed by spin-contrast-variation small-angle neutron scattering

Kumada Takayuki, Nakagawa Hiroshi, Miura Daisuke*, Sekine Yurina, Motokawa Ryuhei, Hiroi Kosuke, Inamura Yasuhiro, Oku Takayuki, Oishi Kazuki*, Morikawa Toshiaki*, Kawamura Yukihiko*, Kawai Kiyoshi*

日本物理学会第78回年次大会(2023年)
The Effect of Zr addition on fine oxide particles in ODS-Cu

Saito Toshiki*, Yu H.*, Inoue Koji*, Zimo G.*, Kondo Sosuke*, Kasada Ryuta*, Nagai Yasuyoshi*, Oba Yojiro, Hiroi Kosuke

日本金属学会2023年春期(第172回)講演大会
Effect of Zr addition on oxide fine particles in ODS-Cu

Saito Toshiki*, Yu H.*, Inoue Koji*, Zimo G.*, Kondo Sosuke*, Kasada Ryuta*, Nagai Yasuyoshi*, Oba Yojiro, Hiroi Kosuke

材料照射研究会2022
Lab SAXS instrument for complementary use of small- and wide-angle neutron scattering instrument BL15 TAIKAN of J-PARC

Hiroi Kosuke, Takata Shinichi, Suzuki Junichi*

日本中性子科学会第22回年会
Neutron scattering study on all-inorganic Li$_{2}$(Li$_{1-x}$Fe$_{x}$)N exhibiting single-molecule magnet behavior

Kofu Maiko, Jesche A.*, Breitner F.*, H\"ohn P.*, Kawamura Seiko, Nakajima Kenji, Hiroi Kosuke, Oishi Kazuki*, Kawamura Yukihiko*

日本中性子科学会第22回年会
Magnetic field dependence of spin misalignment in Fe processed via high-pressure torsion

Oba Yojiro, Adachi Nozomu*, Hiroi Kosuke, Todaka Yoshikazu*

日本中性子科学会第22回年会
Polarization analysis technique for removing incoherent scattering component at MLF BL15 TAIKAN and SANS-J

Hiroi Kosuke, Motokawa Ryuhei, Oba Yojiro, Kumada Takayuki, Okudaira Takuya*, Oku Takayuki, Suzuki Junichi*

第21回日本中性子科学会年会(JSNS 2021)
Magnetic domain observation of a grain-oriented steel under tensile and compressive stress using pulsed polarized neutron imaging

Hiroi Kosuke, Hayashida Hirotoshi*, Parker J. D.*, Shinohara Takenao

3rd Asia-Oceania Conference on Neutron Scattering (AOCNS 2019)
An Energy-resolved Neutron Transmission Imaging Study of Deformation Twinning in Mg and Mg-6Zn

Su Y. H., Gong W.*, Shinohara Takenao, Parker J. D.*, Oikawa Kenichi, Kai Tetsuya, Hiroi Kosuke, Hayashida Hirotoshi*, Matsumoto Yoshihiro*, Kiyanagi Yoshiaki*, Sato Hirotaka*, Harjo S., Aizawa Kazuya

3rd Asia-Oceania Conference on Neutron Scattering (AOCNS 2019)
Magnetic imaging method using pulsed polarized neutrons

Hiroi Kosuke

23rd Meeting of the International Collaboration on Advanced Neutron Sources (ICANS-23)
Activities of neutron resonance absorption imaging in J-PARC

Kai Tetsuya, Tsuchikawa Yusuke, Hiroi Kosuke, Su Y. H., Segawa Mariko, Parker J. D.*, Matsumoto Yoshihiro*, Hayashida Hirotoshi*, Shinohara Takenao, Oikawa Kenichi

3rd J-PARC Symposium (J-PARC 2019)
Development of energy-resolved neutron imaging at RADEN in J-PARC MLF

Shinohara Takenao, Kai Tetsuya, Oikawa Kenichi, Hiroi Kosuke, Su Y. H., Nakatani Takeshi, Seki Yoshichika, Tsuchikawa Yusuke, Hayashida Hirotoshi*, Parker J. D.*, Matsumoto Yoshihiro*, Kiyanagi Yoshiaki*

3rd J-PARC Symposium (J-PARC 2019)
In-situ small and wide angle neutron scattering study on ion exchange membranes using a humidity cell at BL15 TAIKAN

Takata Shinichi, Hiroi Kosuke, Morikawa Toshiaki*, Arima Hiroshi*, Yamada Takeshi*

3rd J-PARC Symposium (J-PARC 2019)
Magnetic lens system for focusing-geometry small-angle neutron scattering at MLF BL15 TAIKAN

Hiroi Kosuke, Takata Shinichi, Oishi Kazuki*, Kawamura Yukihiko*, Iwase Hiroki*, Shinohara Takenao, Oku Takayuki, Suzuki Junichi*

3rd J-PARC Symposium (J-PARC 2019)
State-of-charge distribution of lithium ion battery measured by neutron imaging

Kai Tetsuya, Su Y. H., Hiroi Kosuke, Shinohara Takenao, Oikawa Kenichi, Hayashida Hirotoshi*, Parker J. D.*, Matsumoto Yoshihiro*, Segawa Mariko, Nakatani Takeshi, Kiyanagi Yoshiaki*

2018年度量子ビームサイエンスフェスタ; 第10回MLFシンポジウム/第36回PFシンポジウム

Research Projects

Time-resolved spin contrast variation for precise nanostructure determination

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2021 - Mar, 2026