Hiroki Kobayashi
I am...
PhD student at Geochemical Research Centre (Kagi/Komatsu Group), Graduate School of Science, the University of Tokyo.Research Interest
High-pressure, water, ice, aqueous solutions, phase transition, crystallography, experimental mineral physics and chemistry
Research Experience
Neutron diffraction, x-ray diffraction, Raman spectroscopy, differential scanning calorimetry
Find me at...
E-mail: hiroki@eqchem.s.u-tokyo.ac.jp
Links: ResearchGate Google Scholar
Address: Room 2702, 7F, Chemistry West Building, School of Science, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
Education history
- 2024 – current. PhD student at Department of Chemistry, the University of Tokyo; supervised by Prof. Hiroyuki Kagi and Kazuki Komatsu.
- 2022 - current. World-leading Innovative Graduate Study program for Materials Research, Information, and Technology (MERIT-WINGS), the University of Tokyo; advisory supervisor: Prof. Zenji Hiroi.
- 2022 - 2024. Master course student at Department of Chemistry, the University of Tokyo; supervised by Prof. Hiroyuki Kagi and Kazuki Komatsu.
MSc from the University of Tokyo - 2021 - 2022. Undergraduate student at Geochemical Research Centre, the University of Tokyo; Supervised by Prof. Hiroyuki Kagi and Kazuki Komatsu.
BSc from the University of Tokyo
- I've been studying the hydrogen ordering behaviour of high-pressure ice phases. My first research topic was H-ordering behaviour of ice IV, which has been published: HK et al., JPCL (2023). In 2022, I also started to study the phase transition of ice VI families (namely VI, XV, and XIX) using calorimetric and crystallographic methods.
- Throughout the ice-IV project, where I performed lots of crystallisation experiments of amorphous ice, I got interested in how, when, and where such metastable ice phases form – this is one of my current projects.
Forthcoming events
- I will stay at Dr. Stefan Klotz's group in Sorbonne Univ., Paris, from Feb. 2025 as a visiting researcher.
Featured Works
❄️ Slightly Hydrogen-Ordered State of Ice IV Evidenced by In-Situ Neutron Diffraction
, Kazuki Komatsu, Hayate Ito, Shinichi Machida, Takanori Hattori, and Hiroyuki Kagi.
The Journal of Physical Chemistry Letters (2023) 14 10664
https://doi.org/10.1021/acs.jpclett.3c02563
We reported crystallographic evidence for the hydrogen ordering in ice IV by neutron diffraction. It shows discontinuous behaviour at 120 K and Rietveld analysis at the low-T side suggests it is a very weak hydrogen ordering structural transition.
Awards
- Mar. 2024. 東京大学理学系研究科研究奨励賞, 理学系研究科総代 (Graduate School of Science Awards for Master's studies, UTokyo).
- Aug. 2023. CrSJ Travel Award (fund for the attendance at IUCr2023).
- Dec. 2022. Best presentation award, 6th Neutron and Muon School. "Observations of phonons by inelastic neutron scattering"
- Mar. 2022. 東京大学理学部化学科長賞 (Department of Chemistry Chair Award, Faculty of Science, UTokyo).