Kyushu University Academic Staff Educational and Research Activities Database
Search by Keyword How ro search
Keyword
Search Criteria
 
Detailed Search

Researcher information (To researchers) Need Help? How to update
Takamasa Okumura Last modified date：2023.06.29

Assistant Professor / Electronic Devices, Graduate School and Faculty of Information Science and Electrical Engineering
Department of Electronics
Faculty of Information Science and Electrical Engineering




Homepage
https://kyushu-u.pure.elsevier.com/en/persons/takamasa-okumura
　Reseacher Profiling Tool　Kyushu University Pure
Fax
092-802-3717
Country of degree conferring institution (Overseas)
No
Field of Specialization
High voltage, plasma, pulse power, bio-application
ORCID(Open Researcher and Contributor ID)
6785-1991
Research
Research Interests
  • Surface sterilization and molecular fragmentation with non-thermal atmospheric pressure plasma
    keyword : Plasma sterilization, fragmentation
    2020.12～2021.11.
  • Elucidation of mechanism underlying biological response induction of animal and plant by air atmospheric-pressure low temperature plasma
    keyword : plasma, biological response
    2020.07～2020.07.
  • Research on DLC and CNP deposition using plasma CVD
    keyword : plasma, diamond-like carbon, nanoparticle
    2020.02～2020.07.
Academic Activities
Books
 Show All Books >>
Papers
 Show All Papers >>
1. M. Otaka, T. Arima, J. Lai, K. Ikeda, K. Kamataki, N. Yamashita, T. Okumura, N. Itagaki, K. Koga, M. Shiratani, Spatio-temporal measurements Ar 2p1 excitation rates and optical emission spectroscopy by capacitively coupled Ar and Ne mixed gas plasma, MRS Adv., 10.1557/s43580-022-00306-2, 2022.07.
2. P. Attri, K. Koga, T. Okumura, F. L. Chawarambwa, T. E. Putri, Y. Tsukada, K. Kamataki, N. Itagaki, M. Shiratani, Treatment of organic wastewater by a combination of non-thermal plasma and catalyst: a review, Rev. Mod. Plasma Phys, 10.1007/s41614-022-00077-1, 6, 17, 2022.07.
3. S. Ono, S. H. Hwang, T. Okumura, K. Kamataki, N. Yamashita, N. Itagaki, K. Koga, M. Shiratani, J. S. Oh, S. Takabayashi, T. Nakatani, Raman spectral analysis of the as-deposited aC: H films prepared by CH4+ Ar plasma CVD, MRS Adv., 10.1557/s43580-022-00310-6, 7, 718–722, 2022.07.
4. T. Okumura, P. Attri, K. Kamataki, N. Yamashita, Y. Tsukada, N. Itagaki, M. Shiratani, Y. Ishibashi, K. Kuchitsu, K. Koga, Detection of NO3− introduced in plasma-irradiated dry lettuce seeds using liquid chromatography-electrospray ionization quantum mass spectrometry (LC-ESI QMS), Sci. Rep., 10.1038/s41598-022-16641-1, 12, 12525, 2022.07.
5. K. Kamataki, D. Nagamatsu, T. Yang, K. Abe, A. Yamamoto, I. Nagao, T. Arima, M. Otaka, Y. Yamamoto, D. Yamashita, T. Okumura, N. Yamashita, N. Itagaki, K. Koga, M. Shiratani, Effects of amplitude modulated discharge on growth of nanoparticles in TEOS/O2/Ar capacitively coupled plasma, AIP Adv, 10.1063/5.0097691, 12, 8, 085220, 2022.08.
6. K. Kamataki, D. Nagamatsu, T. Yang, K. Abe, A. Yamamoto, I. Nagao, T. Arima, M. Otaka, Y. Yamamoto, D. Yamashita, T. Okumura, N. Yamashita, N. Itagaki, K. Koga, M. Shiratani, Effects of amplitude modulated discharge on growth of nanoparticles in TEOS/O2/Ar capacitively coupled plasma, AIP Adv., 10.1063/5.0097691, 12, 085220, 2022.08.
7. K. Abe, K. Kamataki, A. Yamamoto, I. Nagao, M. Otaka, D. Yamashita, T. Okumura, N. Yamashita, N. Itagaki, K . Koga, M. Shiratani, Effects of amplitude modulated capacitively coupled discharge Ar plasma on kinetic energy and angular distribution function of ions impinging on electrodes:particle-in-cell/Monte Carlo collision model simulation, Jpn. J. Appl. Phys., 10.35848/1347-4065/ac7626, 61, 10, 106003, 2022.09.
8. K. Koga, P. Attri, T. Okumura, T. Anan, T. Nakao, K. Kamataki, N. Yamashita, N. Itagaki, M. Shiratani, Role of short-lived nitrogen species generated at low-pressure RF plasma on the germination and seedling growth, Bull. Am. Phys. Soc., 2022.10.
9. K. Kamataki, T. Sato, K. Tomita, P. Yimin, D. Yamashita, N. Yamashita, T. Okumura, N. Itagaki, K. Koga, M. Shiratani, Measurements of strength and fluctuation of 2D electric fields in plasmas using a fine particle trapped with laser tweezers, Bull. Am. Phys. Soc., 2022.10.
10. S. Toko, T. Hasegawa, T. Okumura, K. Kamataki, K. Takenaka, K. Koga, M. Shiratani, Y. Setsuhara, Relationship between vibrational temperature and CO2 methanation with plasma catalysis, Bull. Am. Phys. Soc., 2022.10.
11. I. Nagao, A. Yamamoto, Y. Yamamoto, K. Kamataki, T. Okumura, N. Yamashita, N. Itagaki, K. Koga, M. Shiratani, Effects of amplitude modulation discharge on behavior of oxygen ions in Ar/O2 capacitively coupled plasma studied by particle-in-cell/Monte Carlo collision model, Bull. Am. Phys. Soc., 2022.10.
12. M. Otaka, T. Arima, J. Lai, K. Ikeda, K. Kamataki, N. Yamashita, T. Okumura, N. Itagaki, K. Koga, M. Shiratani, Pressure dependence on spatio-temporal distribution of excitation rates of Ar 2p1 and Ne 2p1 in Ar and Ar/Ne capacitively coupled plasmas, Bull. Am. Phys. Soc., 2022.10.
13. M. Shiratani, T. Anan, T. Nakao, T. Okumura, P. Attri, K. Koga, Reproducibility in plasma agriculture, Bull. Am. Phys. Soc., 2022.10.
14. T. Anan, T. Nakao, T. Okumura, P. Attri, K. Kamataki, N. Yamashita, N. Itagaki, K. Koga, M. Shiratani, Effect of plasma irradiation on germination of lettuce seeds with fluctuating dormancy, Bull. Am. Phys. Soc., 2022.10.
15. P. Attri, T. Okumura, K. Koga, K. Kamataki, N. Itagaki, M. Shiratani, N. Takeuchi, Plasma induced conversion of CO2 with water to useful compounds, Bull. Am. Phys. Soc., 2022.10.
16. S. Ono, T. Okumura, K. Kamataki, N. Yamashita, N. Itagaki, K. Koga, M. Shiratani, Process analysis of cracking aC: H/CNP/aC: H sandwich films under stress using nanoindentation, Bull. Am. Phys. Soc., 2022.10.
17. T. Okumura, T. Anan, P. Attri, Y. Tsukada, K. Kamataki, N. Yamashita, N. Itagaki, K. Koga, M. Shiratani, Y. Ishibashi, Plasma irradiation-introduced RONS amount into plant seeds and their response analysis, Bull. Am. Phys. Soc., 2022.10.
18. S. Shenoy, C. Chuaicham, T. Okumura, K. Sekar, K. Sasaki, Simple tactic polycondensation synthesis of Z-scheme quasi-polymeric g-C3N4/CaFe2O4 composite for enhanced photocatalytic water depollution via p-n heterojunction, Chem. Eng. J, 10.1016/j.cej.2022.139758, 453, 139758, 2022.10.
19. R. Narishige, N. Yamashita, K. Kamataki, T. Okumura, K. Koga, M. Shiratani, H. Yabuta, N. Itagaki , Effects of substrate surface polarity on heteroepitaxial growth of pseudobinary ZnO–InN alloy films on ZnO substrates(Invited), J. Mater. Res., 10.1557/s43578-022-00827-4, 2022.11.
20. I. Nagao, K. Kamataki, A. Yamamoto, M. Otaka, Y. Yamamoto, D. Yamashita, N. Yamashita, T. Okumura, N. Itagaki, K. Koga, M. Shiratani, One-dimensional particle-in-cell/Monte Carlo collision simulation for investigation of amplitude modulation effects in RF capacitive discharges, MRS Adv., 10.1557/s43580-022-00417-w, 7, 911-917, 2022.12.
21. N. Yamashita, R. Mitsuishi, Y. Nakamura, K. Takeda, M. Hori, K. Kamataki, T. Okumura, K. Koga, M. Shiratani, Role of insoluble atoms in the formation of a three-dimensional buffer layer in inverted Stranski–Krastanov mode, J. Mater. Res, 10.1557/s43578-022-00886-7, 1-8, 2023.01.
22. P.Attri, K. Koga, T. Okumura, N. Takeuchi, M. Shiratani, Green route for ammonium nitrate synthesis: fertilizer for plant growth enhancement, RSC Adv., 10.1039/D1RA04441A , 11, 46, 28521-28529, 2021.08.
23. P. Attri, T. Anan, R. Arita, T. Okumura, H. Tanaka, D. Yamashita, K. Matsuo, N. Itagaki, K. Kamataki, K. Koga, M. Shiratani, K. Kuchitsu, Y. Ishibashi, Plasma Treatment Effect on the Paramagnetic Species of Barley Seed Radical’s Intensity: An EPR study, Plasma Medicine, 10.1615/PlasmaMed.2020036353, 10, 3, 159-168, 2021.12.
24. S. Toko, M. Ideguchi, T. Hasegawa, T. Okumura, K. Kamataki, K.Takenaka, K. Koga, M. Shiratani, Y. Setsuhara, Effect of gas flow rate and discharge volume on CO2 methanation with plasma catalysis, Jpn. J. Appl. Phys., 10.35848/1347-4065/ac4822, 2022.01.
25. P. Attri, T. Okumura, K. Koga, M. Shiratani, D. Wang, K. Takahashi, K. Takaki, Outcomes of Pulsed Electric Fields and Nonthermal Plasma Treatments on Seed Germination and Protein Functions, Agronomy 2022, 10.3390/agronomy12020482, 12, 2, 482, 2022.02.
26. D. Takahashi, N. Yamashita, D. Yamashita, T. Okumura, K. Kamataki, K. Koga, M. Shiratani, N. Itagaki, Epitaxial Growth of Zn1-xMgxO Films on Sapphire Substrates via Inverted Stranski-Krastanov Mode Using Magnetron Sputtering, MRS Adv., 10.1557/s43580-022-00234-1, 2022.02.
27. P. Attri, K. Ishikawa, T. Okumura, K. Koga, M. Shiratani, Plasma agriculture from laboratory to farm: A review, Processes, 10.3390/pr8081002, 8, 8, 1002, 2020.08.
28. S. H. Hwang, T. Okumura, K. Kamataki, N. Itagaki, K. Koga, T. Nakatani, M. Shiratani, Low stress diamond-like carbon films containing carbon nanoparticles fabricated by combining rf sputtering and plasma chemical vapor deposition, Jpn. J. Appl. Phys. , 10.35848/1347-4065/abbb20, 59, 10, 100906, 2020.10.
29. S. H. Hwang, T. Okumura, K. Kamataki, N. Itagaki, K. Koga, M. Shiratani, Size and flux of carbon nanoparticles synthesized by Ar+CH4 multi-hollow plasma chemical vapor deposition, Diam Relat Mater, 10.1016/j.diamond.2020.108050, 109, 108050, 2020.11.
30. P.Attri, K. Koga, T.Okumura, M. Shiratani, Impact of atmospheric pressure plasma treated seeds on germination, morphology, gene expression and biochemical responses, Jpn. J. Appl. Phys., 10.35848/1347-4065/abe47d, 60, 4, 040502, 2021.03.
31. S. H. Hwang, R. Iwamoto, T. Okumura, K. Kamataki, N. Itagaki, K. Koga, T. Nakatani, M. Shiratani, Comparison between Ar+CH4 Cathode and Anode Coupled Capacitively Coupled Plasma Chemical Vapor Deposition of Hydrogenated Amorphous Carbon Films, Thin Solid Films, 10.1016/j.tsf.2021.138701, 729, 138701, 2021.07.
Presentations
 Show All Presentations >>
1. 奥村賢直, Non-enzymatic Conformational Change of Protein by Non-lethal Stimulation of Atmospheric-Pressure Plasma and Electric Field, 第36回九州・山口プラズマ研究会, 2020.11.
2. T. Okumura, H. Tanaka, R. Arita, D. Yamashita, K. Matsuo, P. Attri, K. Kamataki, N. Itagaki, K. Koga, M. Shiratani, Growth of Rice Cultivated in Field from Plasma-irradiated Seeds and Its Health Assessment for rats, 第30回日本MRS年次大会, 2020.12.
Awards
  • The 10th Asia-Pacific International Symposium on the Basics and Applications of Plasma Technology (APSPT 2017) Best Poster Paper Award
  • Akasaki Scholarship


Unauthorized reprint of the contents of this database is prohibited.

Copyright © 2006, Kyushu University. All rights reserved.