Ryohei Nagahiro

Ryohei Nagahiro

Postdoctoral Researcher
Shiomi-Lab
Institute of Engineering Innovation
Graduate School of Engineering
The University of Tokyo

Publications

For a complete list of publications, please see my Google Scholar profile.

Journal Articles

  1. A. R. Odufisan, B. Stern, R. Nagahiro, R. Wynnychenko, S. Chanakian, J. Shiomi, E. Isotta, O. Balogun, “The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements”, Journal of Visualized Experiments (JoVE) (226), e68908, (2025). https://doi.org/10.3791/68908

  2. R. Nagahiro, B. Xu, S. Terashima, Y. Li, Y. Li, Y. Liao, Z. Fang, C. Shao, M. Ohnishi, S. Kato, E. Iwase, J. Shiomi, “Module-scale silicon 3D softened nanoarchitectures for eco-friendly thermoelectric energy harvesting”, Materials Today Physics, 57, 101798, (2025). https://doi.org/10.1016/j.mtphys.2025.101798

  3. E. Isotta, R. Nagahiro, A. R. Odufisan, J. Shiomi, O. Balogun, G. J. Snyder, “A thermal boundary resistance model via mean free path suppression functions and a Gibbs excess approach”, International Journal of Heat and Mass Transfer 252, 127417 (2025). https://doi.org/10.1016/j.ijheatmasstransfer.2025.127417

  4. E. Isotta, S. Jiang, R. Bueno Villoro, R. Nagahiro, K. Maeda, D. A. Mattlat, A. R. Odufisan, A. Zevalkink, J. Shiomi, S. Zhang, C. Scheu, G. J. Snyder, O. Balogun, “Heat transport at silicon grain boundaries”, Advanced Functional Materials 34 (40), 2405413 (2024). https://doi.org/10.1002/adfm.202405413

  5. B. Xu, Y. Liao, Z. Fang, Y. Li, R. Guo, R. Nagahiro, Y. Ikoma, M. Kohno, J. Shiomi, “Extremely suppressed thermal conductivity of large-scale nanocrystalline silicon through inhomogeneous internal strain engineering”, Journal of Materials Chemistry A 11 (35), 19017-19024 (2023). https://doi.org/10.1039/D3TA03011C

  6. Y. Hangai, D. Kawato, M. Ando, M. Ohashi, Y. Morisada, T. Ogura, H. Fujii, R. Nagahiro, K. Amagai, T. Utsunomiya, N. Yoshikawa, ”Nondestructive observation of pores during press forming of aluminum foam by X-ray radiography”, Materials Characterization 170, 110631 (2020). https://doi.org/10.1016/j.matchar.2020.110631

  7. Y. Hangai, M. Ohashi, R. Nagahiro, K. Amagai, T. Utsunomiya, N. Yoshikawa, ”Continuous Foaming of Multiple Aluminum Foam Precursors by Combining Conveyor and Optical Heating”, Materials Transactions 61 (8), 1703-1706 (2020). https://doi.org/10.2320/matertrans.MT-M2020137

  8. Y. Hangai, K. Takahashi, R. Nagahiro, K. Amagai, T. Utsunomiya, N. Yoshikawa, ”Fabrication of aluminum foam with complex shapes using pin screen mold and effect of arrangement of pins on its surface morphology”, Journal of Porous Materials 27, 347-353 (2020). https://doi.org/10.1007/s10934-019-00810-1

  9. Y. Hangai, K. Takada, H. Fujii, Y. Aoki, Y. Aihara, R. Nagahiro, K. Amagai, T. Utsunomiya, N. Yoshikawa, ”Foaming of A1050 aluminum precursor by generated frictional heat during friction stir processing of steel plate”, The International Journal of Advanced Manufacturing Technology 106, 3131-3137 (2020). https://doi.org/10.1007/s00170-019-04834-4

  10. R. Nagahiro, N. Rosli, Y. Hangai, A. Yano, K. Amagai, ”Uniform Heating Model Analysis for the Formation Process of Aluminium Foam by Spot-Type Halogen Lamp”, International Journal of Automotive and Mechanical Engineering 16 (4), 7170-7180 (2019). https://doi.org/10.15282/ijame.16.4.2019.02.0536

  11. Y. Hangai, M. Ohashi, R. Nagahiro, K. Amagai, T. Utsunomiya, N. Yoshikawa, ”Press forming of aluminum foam during foaming of precursor”, Materials Transactions 60 (11), 2464-2469 (2019). https://doi.org/10.2320/matertrans.MT-M2019192

  12. Y. Hangai, H. Matsushita, R. Suzuki, S. Koyama, K. Amagai, R. Nagahiro, T. Utsunomiya, M. Matsubara, N. Yoshikawa, ”Refoaming of deformed aluminum foam by precursor foaming process”, Journal of Porous Materials 26, 1149-1155 (2019). https://doi.org/10.1007/s10934-018-0716-y

  13. Y. Hangai, R. Nagahiro, M. Ohashi, K. Amagai, T. Utsunomiya, N. Yoshikawa, ”Shaping of aluminum foam during foaming of precursor using steel mesh with various opening ratios”, Metals 9 (2), 223 (2019). https://doi.org/10.3390/met9020223

  14. Y. Hangai, K. Takahashi, R. Nagahiro, K. Amagai, T. Utsunomiya, ”Shaping of Aluminum Foam Using Point Group Mold”, Materials Transactions 59 (12), 1952-1955 (2018). https://doi.org/10.2320/matertrans.M2018281