Kyushu University Academic Staff Educational and Research Activities Database
Researcher information (To researchers) Need Help? How to update
Mitsuhiro Murayama Last modified date:2021.08.02



Graduate School
総合理工学府1類物質科学 材料理工学


E-Mail *Since the e-mail address is not displayed in Internet Explorer, please use another web browser:Google Chrome, safari.
Homepage
https://kyushu-u.pure.elsevier.com/en/persons/mitsuhiro-murayama
 Reseacher Profiling Tool Kyushu University Pure
https://murayamasaito.weebly.com/
Nanoscale Characterization of Materials Group, Division of Integrated Materials, Institute for Materials Chemistry and Engineering
Professor (full) Mitsuhiro Murayama
Professor (Associate) Hikaru Saito
Professor (Assistant) Shiro Ihara .
Academic Degree
Doctor of Engineering
Country of degree conferring institution (Overseas)
No
Field of Specialization
Materials Science and Engineering, Earth Science
ORCID(Open Researcher and Contributor ID)
0000-0003-1965-4891
Total Priod of education and research career in the foreign country
17years00months
Research
Research Interests
  • Toward the quantitative understanding of deformed microstructure in both brittle and ductile inorganic materials
    keyword : Transmission Electron Microscopy, in-situ observation, plastic deformation
    2019.09~2022.03.
Academic Activities
Reports
1. Steven R. Spurgeon, Colin Ophus, Lewys Jones, Amanda Petford-Long, Sergei V. Kalinin, Matthew J. Olszta, Rafal E. Dunin-Borkowski, Norman Salmon, Khalid Hattar, Wei-Chang D. Yang, Renu Sharma, Yingge Du, Ann Chiaramonti, Haimei Zheng, Edgar C. Buck, Libor Kovarik, R. Lee Penn, Dongsheng Li, Xin Zhang, Mitsuhiro Murayama, Mitra L. Taheri, Towards data-driven next-generation transmission electron microscopy, Nature Materials, https://doi.org/10.1038/s41563-020-00833-z, 2020.10, Electron microscopy touches on nearly every aspect of modern life, underpinning materials development for quantum computing, energy and medicine. We discuss the open, highly integrated and data-driven microscopy architecture needed to realize transformative discoveries in the coming decade..
2. S. Hata, T. Honda, H. Saito, M. Mitsuhara, T.C. Petersen, M. Murayama, Electron tomography: An imaging method for materials deformation dynamics, Current Opinion in Solid State and Materials Science, https://doi.org/10.1016/j.cossms.2020.100850, IF = 9.571, 2020.02, [URL], The combination of in-situ and three-dimensional (3D) in transmission electron microscopy (TEM) is one of the emerging topics of recent advanced electron microscopy research. However, to date, there have been only handful examples of in-situ 3D TEM for material deformation dynamics. In this article, firstly, the authors briefly review technical developments in fast tilt-series dataset acquisition, which is a crucial technique for in-situ electron tomography (ET). Secondly, the authors showcase a recent successful example of in-situ specimen-straining and ET system development and its applications to the deformation dynamics of crystalline materials. The system is designed and developed to explore, in real-time and at sub-microscopic levels, the internal behavior of polycrystalline materials subjected to external stresses, and not specifically targeted for atomic resolution (although it may be possible). Technical challenges toward the in-situ ET observation of 3D dislocation dynamics are discussed for commercial structural crystalline materials, including some of the early studies on in-situ ET imaging and 3D modeling of dislocation dynamics. A short summary of standing technical issues and a proposed guideline for further development in the 3D imaging method for dislocation dynamics are then discussed..
Papers
1. Toshiki Shimizu, Dominik Lungerich, Joshua Stuckner, Mitsuhiro Murayama, Koji Harano, Eiichi Nakamura, Real-Time Video Imaging of Mechanical Motions of a Single Molecular Shuttle with Sub-Millisecond Sub-Angstrom Precision, Bulletin of the Chemical Society of Japan , https://doi.org/10.1246/bcsj.20200134, 93, 9, 1079-1085, 2020.06, Miniaturized machines have open up a new dimension of chemistry, studied usually as an average over numerous molecules or for a single molecule bound on a robust substrate. Mechanical motions at a single molecule level, however, are under quantum control, strongly coupled with fluctuations of its environment — a system rarely addressed because an efficient way of observing the nanomechanical motions in real time is lacking. Here, we report sub-millisecond sub-Å precision in situ video imaging of a single fullerene molecule shuttling, rotating, and interacting with a vibrating carbon nanotube at 0.625 milliseconds(ms)/frame or 1600 fps, using an electron microscope, a fast camera, and a denoising algorithm. We have achieved in situ observation of the mechanical motions of a molecule coupled with vibration of a carbon nanotube with standard error as small as 0.9 millisecond in time and 0.01 nm in space. We have revealed rich molecular dynamics, where motions are non-linear, stochastic and often non-repeatable, and a work and energy relationship at a molecular level previously undetected by time-averaged measurements or microscopy. The molecular video recording at a 1600-fps rate exceeds by 100 times the previous records of continuous recording of molecular motions..
2. CY Hung, Y Bai, T Shimokawa, N Tsuji, M Murayama, A correlation between grain boundary character and deformation twin nucleation mechanism in coarse-grained high-Mn austenitic steel., Scientific reports, https://doi.org/10.1038/s41598-021-87811-w, 11, 8468, 2021.04.
Membership in Academic Society
  • The Japanese Society of Microscopy
Awards
  • Best paper award, Bulletin of the Chemical Society of Japan, 2020
Educational
Educational Activities
1. Graduate course teaching (nanoscale characterization by electron microscopy) and transmission electron microscopy operation training instructions
2. Mentoring and advising graduate students (sole and joint)
3. Advising postdoctoral fellows and young faculty members
Other Educational Activities
  • 2020.11.
Social
Professional and Outreach Activities
Site Director, The Virginia Tech National Center for Earth and Environmental Nanotechnology Infrastructure, a member of NSF National Nanotechnology Coordinated Infrastructure
.