Curriculum Vitaes

Kunihito Tanaka

  (田中 邦翁)

Profile Information

Affiliation
Associate Professor, Faculty of Science and Technology, Department of Materials and Life Sciences, Sophia University
Degree
Master of Engineering(Sophia University)
修士(工学)(上智大学)
博士(工学)(上智大学)

Contact information
tanakamls.sophia.ac.jp
Researcher number
60276516
J-GLOBAL ID
200901021327915130
researchmap Member ID
1000260137

The atmospheric pressure glow plasma (APG) generation method developed in our University is a new technology that can generate non-equilibrium (low temperature) plasma with high density of active species in an atmospheric pressure. I make the best use of the feature of this APG plasma, and conduct applied studies to use the APG plasma for manufacturing industry and basic studies such as the analysis of the reaction in the APG plasma.

(Subject of research)
Study on Ashing Process with Jet-Type Atmospheric Pressure Glow Plasma Reactor
Deposition of Fluorinated Polymers by Atmospheric Pressure Glow Plasma
Diagnostic of Atmosphevic Pressure Glow Plasma
Moisture Prevention Layer Formation on Ammonium Nitrate Powder Surface with Atmospheric Pressure Glow Plasma Deposition Technique
Defluorination of fluorine contained resin by Atmospheric Pressure Glow Plasma Treatment


Papers

 38
  • Masuhiro Kogoma, Kunihito Tanaka
    Journal of Photopolymer Science and Technology, 37(4) 385-390, Jun 25, 2024  Corresponding author
  • Kunihito Tanaka, Koya Sato, Kazuo Takahashi, Masuhiro Kogoma
    Journal of Photopolymer Science and Technology, 35(4) 299-302, Dec 16, 2022  
  • Lokadi Pierre Luhata, Christian Nanga Chick, Natsuki Mori, Kunihito Tanaka, Hiroshi Uchida, Takashi Hayashita, Toyonobu Usuki
    Molecules, 27(10) 3210-3210, May 17, 2022  
    The aqueous extract of the leaves of Odontonema strictum (OSM) is used in folk medicine for its antihypertensive properties, and it contains a wide range of secondary metabolites, mostly polyphenols such as verbascoside and isoverbascoside, which could play a major role in the preparation of silver nanoparticles. In this study, we aimed to prepare AgNPs for the first time using the OSM leaf extract (OSM-AgNPs) to investigate their free radical-scavenging potency against 1,1-diphenyl-2-picrylhydrazyl (DPPH) and hydrogen peroxide (H2O2). Dynamic light scattering (DLS), UV/Vis, Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), and X-ray photoelectron spectroscopy (XPS) were used to characterize the OSM-AgNPs. With a size around 100 nm and a ζ-potential of −41.1 mV, OSM-AgNPs showed a good stability and a better colloidal property due to electrostatic repulsion and the dispersity. The strong absorption peak at 3 keV in the EDX spectra indicated that silver was the major constituent. Additionally, the existence of silver atoms was confirmed by the Ag 3d5/2 peak around 367 eV in the XPS spectra. IC50 values of 116 μg/mL and 4.4 μg/mL were obtained for the scavenging activities of DPPH and H2O2, respectively. The synthetic OSM-AgNPs can be further exploited as potential antioxidant agents.
  • Masuhiro Kogoma, Kunihito Tanaka
    Reviews of Modern Plasma Physics, 5(1), Dec, 2021  Peer-reviewedLast author
    <title>Abstract</title>The atmospheric pressure low-temperature homogeneous discharge using helium and nitrogen, both known for industrial applications, was reviewed. In case of helium, metastable atoms (21s and 23s) produced in the glow discharge were able to dissociate mixed molecular gases to produce radicals or atoms. Radical species undergo chemical reactions, such as oxidation or nitration reaction and form products on the electrode surfaces. Applications of helium atmospheric pressure glow discharge including surface treatment of plastic films to enhance adhesibility with glue, weakening strength with pressure-sensitive glue, and deposition of solid material on a flat plate or powder surfaces, were described. Moreover, the microwave low-temperature discharge using nitrogen, as a cost-saving carrier gas, were introduced for the surface cleaning of silicon wafer.
  • Koya Sato, Masuhiro Kogoma, Kunihito Tanaka
    Journal of Photopolymer Science and Technology, 32(3) 519-521, 2019  Peer-reviewed

Misc.

 7

Books and Other Publications

 3

Presentations

 85

Professional Memberships

 1

Research Projects

 4

Other

 1
  • Apr, 2002
    実験レポートは卒業論文など、科学技術報告書を作成する上での基礎となる。その為、単にレポートの評価を行うだけでなく、構成方法を始め、論理の展開などについて口頭で指導を行っている。