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Reseacher

Name CHOI Junho
Official Title Professor
Affiliation Department of Mechanical Engineering
E-mail choi@tcu.ac.jp
Web
  1. https://www.risys.gl.tcu.ac.jp/Main.php?action=profile&type=detail&tchCd=5002272000
  2. https://sites.google.com/site/jchoiut/
Profile Junho Choi received his bachelor’s degree in 1994 and master’s degree in 1996 from the Department of Metallurgical Engineering, Korea University, Seoul, Korea. He obtained Ph.D. from the Department of Mechanical Engineering, The University of Tokyo in 2000. Since 2010, he has been an Associate Professor at the Department of Mechanical Engineering, The University of Tokyo. Currently, he is a professor in the Department of Mechanical Engineering at Tokyo City University. His research interests are surface engineering and tribology, including plasma coating, triboelectric nanogenerators, superlubricity, diamond-like carbon films, nano-carbon materials, superoleophobicity, and so on.
Research Field(Keyword & Summary)
  1. (1) Three-Dimensional DLC coatings

    DLC coating on three-dimensional, complex-shaped targets using plasma-based ion implantation and deposition (PBII&D)

  2. (2) Triboelectric Nanogenerators

    Development of highly durable DLC-based Triboelectric Nanogenerators for condition monitoring of mechanical systems

  3. (3) Superlubricity

    Development of lubrication systems with ultra-low friction using carbon related materials

  4. (4) Superoleophobicity and superhydrophobicity

    Development of highly durable superoleophobic surface over a large area

  5. (5) Supersmoothing

    Atomic-scale smoothing of nanoscale three-dimensional surfaces
Representative Papers
  1. (1) Triboelectric Nanogenerator with Enhanced Output and Durability based on Si-DLC films, M. Gao, S.B. Kim, Y. Li, J. Choi, Nano Energy, 105 (2023) 107997.
  2. (2) Suppression of wetting transition on evaporative fakir droplets by using slippery superhydrophobic surfaces with low depinning force, J. A Shamim, Y. Takahashi, A. Goswami, N. Shaukat, W-L. Hsu, J. Choi, H. Daiguji, Scientific Report, 13 (2023) 2368.
  3. (3) Triboelectric pad journal bearing for self-powered condition monitoring, M. Gao, Y. Li, J. Choi, Nano Energy, 103 (2022) 107581.
  4. (4) Effect of water adsorption layers on the friction properties of fluorinated amorphous carbon films in ambient air, T. Yonezawa, T. Ishikawa, J. Choi, Langmuir, 38 (2022) 12894.
  5. (5) Formation of large-area closely packed carbon onions film by plasma-based ion implantation, N. Matsumoto, H. Kinoshita, J. Choi, T. Kato, Scientific Report, 10 (2020) 10037.
  6. (6) Atomic-scale insights into the interfacial instability of superlubricity in hydrogenated amorphous carbon films, X. Chen, X. Yin, W. Qi, C. Zhang, J. Choi, S. Wu, R. Wang, J. Luo, Science Advances, 6 (2020) eaay 1272.
  7. (7) Investigation of diamond-like carbon films as a promising dielectric material for triboelectric nanogenerator, S. H. Ramaswamy, J. Shimizu, W. Chen, R. Kondo, J. Choi, Nano Energy, 60 (2019) 875.
  8. (8) Macroscale tribological properties of fluorinated graphene" K. Matsumura, S. Chiashi, S. Maruyama, J. Choi, Applied Surface Science, 432 (2018) 190.
  9. (9) Structure and mechanical properties of a-C:H films deposited on a three-dimensional target: Comparative study on target scale and aspect ratio, Y. Hirata, J. Choi, J. Phys. D: Appl. Phys. 50 (2017) 155204.
  10. (10) Deposition of a-C:H films on a nanotrench pattern by bipolar PBII&D, Y. Hirata, Y. Nakahara, K. Nagato, J. Choi, J. Phys. D: Appl. Phys. 49 (2016) 245303.
Patent
  1. 1) A.V. Sumant, A. Erdemir, J. Choi, D. Berman, Superlubricating graphene and graphene oxide films, US 11,230,681 B2, Jan. 25, 2022.
  2. 2) J. Choi, J. Shimizu, W. Chen, Triboelectric Power Generation Device, JP 7086414 B2, July 25, 2019.
  3. 3) J. Choi, Y. Shimozawa, K. Shigeta, Y. Sato, JP 2021017638 A, July 23, 2019.
Award 1) Paper Award, The Japanese Society of Tribologists (2020)
2) Iwaki Tribo-Coating Network Award (Iwaki Award) (2014)
Grant-in-Aid for Scientific Research Support: Japan Society for Promotion of Science (JSPS) https://nrid.nii.ac.jp/ja/nrid/1000030392632/
Research Grants/Projects including subsidies, donations, grants, etc. JKA and its promotion funds from KEIRIN RACE
Recruitment of research assistant(s) No
Affiliated academic society (Membership type) JSME, JAST, JVSS, SFJ
Education Field (Undergraduate level) Tribology, Internal combustion engine
Education Field (Graduate level) Tribology, Internal combustion engine

Affiliation