Ryuhei Motokawa - My portal

Profile Information

Affiliation: Japan Atomic Energy Agency

Degree: 博士（工学）(千葉大学)

Researcher number: 50414579
ORCID ID: https://orcid.org/0000-0001-5010-0112
J-GLOBAL ID: 200901009076563450
researchmap Member ID: 5000101312

External link: https://scholar.google.co.jp/citations?user=6pIddnoAAAAJ&hl=ja

Research Interests

Research Areas

Research History

Jul, 2017 - Present

Materials Sciences Research Center, Japan Atomic Energy Agency
Oct, 2016 - Jun, 2017

Materials Sciences Research Center, Japan Atomic Energy Agency
Apr, 2010 - Sep, 2016

Japan Atomic Energy Agency
2014 - 2016

Ibaraki University
Apr, 2008 - Mar, 2010

Japan Atomic Energy Agency
Apr, 2005 - Mar, 2008

博士研究員, 日本原子力研究所先端基礎研究センター
Mar, 2005

Material Science, Graduate School of Science and Technology, Chiba University

Education

- Mar, 2005

Chiba University
- 1999

Faculty of Engineering, Chiba University

Committee Memberships

2019 - Present

専門調査員, 科学技術・学術政策研究所科学技術予測センター
Jun, 2015 - Present

Scientific Reports誌, Editorial board member, Nature Publishing Group
2021 - 2022

科学研究費委員会専門委員, 独立行政法人日本学術振興会
2016 - 2019

関東支部茨城地区研究交流会運営委員, 日本化学会
2016 - 2017

科学研究費委員会専門委員, JSPS
Dec, 2015 - Dec, 2015

Session Organizer (#97: Coordination and Supramolecular Chemistry for Aqueous Metal Ion Separations), Pacifichem 2015

Papers

Organization of malonamides from the interface to the organic bulk phase

Cyril Micheau, Yuki Ueda, Ryuhei Motokawa, Kazuhiro Akutsu-Suyama, Norifumi L. Yamada, Masako Yamada, Sayed Ali Moussaoui, Elizabeth Makombe, Daniel Meyer, Laurence Berthon …

Journal of Molecular Liquids, 401 124372-124372, May, 2024 Peer-reviewedCorresponding author
Contrast dependence of scattering profiles for poly(ethylene glycol) in water: Investigation by small-angle neutron scattering with 3He spin filter and small-angle x-ray scattering

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

The Journal of Chemical Physics, 160(11), Mar 21, 2024 Peer-reviewed
Synthesis of heat-resistant living polymer particles by one-step reversible addition-fragmentation chain transfer precipitation polymerization of styrene and N-phenylmaleimide

Shun Yamazaki, Naoya Kaneko, Atsuya Kato, Kohei Watanabe, Daisuke Aoki, Tatsuo Taniguchi, Takashi Karatsu, Yuki Ueda, Ryuhei Motokawa, Koki Okura …

Polymer, 126846-126846, Mar, 2024 Peer-reviewedCorresponding author
Freeze-crosslinking approach for preparing carboxymethyl cellulose nanofiber/zirconium hydrogels as fluoride adsorbents

Yurina Sekine, Takuya Nankawa, Tsuyoshi Sugita, Yoshiyasu Nagakawa, Yuki Shibayama, Ryuhei Motokawa, Tomoko Ikeda-Fukazawa

Nanoscale, 2024 Peer-reviewed
Water Fraction Dependence of the Aggregation Behavior of Hydrophobic Fluorescent Solutes in Water–Tetrahydrofuran

Hayato Tsuji, Masaki Nakahata, Mafumi Hishida, Hideki Seto, Ryuhei Motokawa, Takeru Inoue, Yasunobu Egawa

The Journal of Physical Chemistry Letters, 11235-11241, Dec 7, 2023 Peer-reviewed
Upgrade of the small-angle neutron scattering diffractometer SANS-J at JRR-3

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

Journal of Applied Crystallography, 56(6), Nov 24, 2023 Peer-reviewedCorresponding author
Polarized Neutrons Observed Nanometer-Thick Crystalline Ice Plates in Frozen Glucose Solution

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

The Journal of Physical Chemistry Letters, 14(34) 7638-7643, Aug 22, 2023 Peer-reviewed
Foam Flotation of Clay Particles Using a Bifunctional Amine Surfactant

Cyril Micheau, Yuki Ueda, Ryuhei Motokawa, Pierre Bauduin, Luc Girard, Olivier Diat

Langmuir, 39(31) 10965-10977, Jul 28, 2023 Peer-reviewedCorresponding author
Structural changes of polystyrene particles in subcritical and supercritical water revealed by in situ small-angle neutron scattering

Motoki Shibata, Yohei Nakanishi, Jun Abe, Hiroshi Arima-Osonoi, Hiroki Iwase, Mitsuhiro Shibayama, Ryuhei Motokawa, Takayuki Kumada, Shin-ichi Takata, Katsuhiro Yamamoto …

Polymer Journal, 55(11) 1165-1170, Jul 6, 2023 Peer-reviewed
Heterogeneous Aggregation of Humic Acids Studied by Small-Angle Neutron and X-ray Scattering

Takumi Saito, Ryuhei Motokawa, Takahiro Ohkubo, Daisuke Miura, Takayuki Kumada

Environmental Science & Technology, 57(26) 9802-9810, Jun 22, 2023 Peer-reviewed
Neutron resonance absorption imaging of simulated high-level radioactive waste in borosilicate glass

Y. Oba, R. Motokawa, K. Kaneko, T. Nagai, Y. Tsuchikawa, T. Shinohara, J. D. Parker, Y. Okamoto

Scientific Reports, 13(1), Jun 21, 2023 Peer-reviewed
Hierarchical Aggregation in a Complex Fluid─The Role of Isomeric Interconversion

Daniel Massey, Christopher D. Williams, Junju Mu, Andrew J. Masters, Ryuhei Motokawa, Noboru Aoyagi, Yuki Ueda, Mark R. Antonio

The Journal of Physical Chemistry B, 127(9) 2052-2065, Feb 23, 2023 Peer-reviewedCorresponding author
Deuterated Malonamide Synthesis for Fundamental Research on Solvent Extraction Systems

Cyril Micheau, Yuki Ueda, Kazuhiro Akutsu-Suyama, Damien Bourgeois, Ryuhei Motokawa

Solvent Extraction and Ion Exchange, 41(2) 221-240, Jan 23, 2023 Peer-reviewedCorresponding author
Structural Approach to Understanding the Formation of Amorphous Metal Hydroxides

Taishi Kobayashi, Tomokazu Fushimi, Hirofumi Mizukoshi, Ryuhei Motokawa, Takayuki Sasaki

Langmuir, 38(48) 14656-14665, Nov 18, 2022 Peer-reviewedCorresponding author
Polymer Photonic Crystals Prepared by Triblock Copolymerization-inducedin situMicrophase Separation

Yuka Isozaki, Seiya Higashiharaguchi, Naoya Kaneko, Shun Yamazaki, Tatsuo Taniguchi, Takashi Karatsu, Yuki Ueda, Ryuhei Motokawa

Chemistry Letters, 51(6) 625-628, Jun 5, 2022 Peer-reviewedCorresponding author
Nanoscopic structure of borosilicate glass with additives for nuclear waste vitrification

Ryuhei Motokawa, Koji Kaneko, Yojiro Oba, Takayuki Nagai, Yoshihiro Okamoto, Taishi Kobayashi, Takayuki Kumada, William T. Heller

Journal of Non-Crystalline Solids, 578 121352-121359, Feb, 2022 Peer-reviewedLead authorCorresponding author
New Design of a Sample Cell for Neutron Reflectometry in Liquid–Liquid Systems and Its Application for Studying Structures at Air–Liquid and Liquid–Liquid Interfaces

Akutsu-Suyama, Kazuhiro, Yamada, Norifumi L, Ueda, Yuki, Motokawa, Ryuhei, Narita, Hirokazu

Applied Sciences, 12(3) 1215(1-10)-1215, Jan, 2022 Peer-reviewed
Polarization analysis for small-angle neutron scattering with a 3He spin filter at a pulsed neutron source

Takuya Okudaira, Yuki Ueda, Kosuke Hiroi, Ryuhei Motokawa, Yasuhiro Inamura, Shin-ichi Takata, Takayuki Oku, Jun-ichi Suzuki, Shingo Takahashi, Hitoshi Endo …

Journal of Applied Crystallography, 54(2) 548-556, Apr 1, 2021 Peer-reviewedCorresponding author
Development of spin-contrast-variation neutron powder diffractometry for extracting the structure factor of hydrogen atoms

Daisuke Miura, Takayuki Kumada, Yurina Sekine, Ryuhei Motokawa, Hiroshi Nakagawa, Yojiro Oba, Takashi Ohhara, Shin-ichi Takata, Kosuke Hiroi, Toshiaki Morikawa …

Journal of Applied Crystallography, 54(2) 454-460, Apr 1, 2021 Peer-reviewed
Precious Metal Separations

Hirokazu Narita, Ryo Kasuya, Tomoya Suzuki, Ryuhei Motokawa, Mikiya Tanaka

Encyclopedia of Inorganic and Bioinorganic Chemistry, 1-28, Dec 17, 2020 Peer-reviewed

Misc.

Introduction to SANS-J and PNO

熊田高之, 元川竜平, 中川洋, 大場洋次郎, 関根由莉奈

波紋, 31(1), 2021
原子炉材料の放射影響解析を目的とした異常X線小角散乱法の開発

冨永亜希, 大場洋次郎, 菖蒲敬久, 谷田肇, 大和田謙二, 金野杏彩, 諸岡聡, 元川竜平, 熊田高之

日本原子力学会春の年会予稿集(CD-ROM), 2019, 2019
BL22XUにおける異常X線小角散乱法の開発

冨永亜希, 大場洋次郎, 菖蒲敬久, 大和田謙二, 谷田肇, 金野杏彩, 諸岡聡, 元川竜平, 熊田高之

日本放射光学会年会・放射光科学合同シンポジウム(Web), 32nd, 2019

Research Projects

超分子論的アプローチによるアクチノイド元素の分離技術高度化に向けた学理探求

科学研究費助成事業, 国際共同研究加速基金(海外連携研究), 日本学術振興会, Sep, 2023 - Mar, 2029

元川竜平
液－液抽出による隣接するレアアース元素の相互分離技術の高度化

科学研究費助成事業, 基盤研究(B), 日本学術振興会, Apr, 2023 - Mar, 2026

成田弘一, 元川竜平, 上田祐生, 阿久津和宏, 鈴木智也
Nanoscopic structures for separating radioactive metal ions in liquid-liquid extraction

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2022 - Mar, 2026
Time-resolved spin contrast variation for precise nanostructure determination

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2021 - Mar, 2026
Design of supramolecular systems for spent nuclear fuel reprocessing and the recover y of valuable metals

JSPS, Apr, 2022 - Mar, 2024
Fluorescence detection of hydrogen-bonding strength using ESIPT-type fluorescent probe

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, Apr, 2021 - Mar, 2024
液ー液抽出における貴金属錯体の界面反応及び高次構造に基づく新規分離系開発

科学研究費助成事業基盤研究(B), 基盤研究(B), 日本学術振興会, Apr, 2020 - Mar, 2023

成田弘一, 伊藤文之, 元川竜平, 阿久津和宏
Structural approach to understanding the dissolution behavior of solid-solution fuel debris

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2020 - Mar, 2023
The structural order and physical interaction between tetravalent f-block metals that form super cluster

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, Apr, 2020 - Mar, 2023
Understanding specific binidng of radionuclides by organic-inorganiccomposites by nanos-cale structural analyses

Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory), Grant-in-Aid for Challenging Research (Exploratory), Japan Society for the Promotion of Science, Jul, 2020 - Mar, 2022

Saito Takumi
Development of vitrification technique based on structural analysis using neutron scattering

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2018 - Mar, 2022

MOTOKAWA Ryuhei
Elucidation of aggregation properties of complexes in the organic phase and development of extraction solvents for platinum group metals

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2017 - Mar, 2020

Narita Hirokazu
Mesoscopic investigation of nuclide sorption behavior on clay minerals by X-ray and neutron scattering

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2016 - Mar, 2019

Endo Hitoshi
Femtosecond laser ablation studied by time-resolved soft X-ray small-angle scattering using X-ray laser

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, Apr, 2015 - Mar, 2018

KUMADA Takayuki, NISHIKINO Masaharu, HASEGAWA Noboru, SUEMOTO Toru, OTOBE Tomohito, MOTOKAWA Ryuhei
Hierarchical structure and its dynamics: self-assembly of extracted coordination species in a spent fuel reprocessing process

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2014 - Mar, 2018

Motokawa Ryuhei, HELLER T. William
Development of new rhodium extraction systems by using synergistic effect and analyses of their separation mechanism

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2014 - Mar, 2017

Narita Hirokazu
Development of regenerative polymer adsorbent for reducing volume of radiocesium from waste zeolite

Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B), Grant-in-Aid for Young Scientists (B), Japan Society for the Promotion of Science, Apr, 2012 - Mar, 2014

MOTOKAWA Ryuhei
Elucidation of outer-sphere size recognition effects and development of new separation reagents for extraction of platinum group metals

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2011 - Mar, 2014

NARITA Hirokazu, MOTOKAWA Ryuhei
Recovery of Rare Elements from High Revel Radioactive Effluent by Using Nano-assembled Polymers

Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B), Grant-in-Aid for Young Scientists (B), Japan Society for the Promotion of Science, 2010 - 2011

MOTOKAWA Ryuhei