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Yoshiyuki Suda

Affiliation Department of Electrical and Electronic Information Engineering
Title Associate Professor
Fields of Research Plasma Materials Engineering/Carbon Nanomaterials Processing
Degree Dr. Eng. (Hokkaido University)
Academic Societies The Japan Society of Applied Physics/The Fullerenes, Nanotubes and Graphene Research Society/The Institute of Electrical Engineers of Japan/The Electrochemical Society of Japan
E-mail suda@ee
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Laboratory website URL


Research themes:
(1) Synthesis of carbon nanomaterials: nanoparticle, nanofiber, graphene, and helical nanofiber by chemical vapor deposition (CVD) or plasma processing
(2) Development of quantity synthesis technique of carbon nanocoils with controlled diameter and crystallinity
(3) Application of carbon nanomaterials to energy devices: fuel cell and electric double layer capacitor (EDLC)
(4) Irradiation of atmospheric pressure non-equilibrium plasma to living cell model and observation of its lateral diffusion
(5) Synthesis of multi-walled carbon nanocoil and its 3D-imaging with transmission electron microscopy tomography system

Theme1:Development of energy devices using carbon nanocoils


PtRu catalysts for fuel cell were supported on five types of carbon nanomaterials of various shapes, sizes, and graphitic properties and the catalyst supports evaluated. The carbon nanomaterial used included three types of nanoparticles: Arc Black (AcB), Vulcan XC-72 (Vulcan) and graphene oxide (GO), and two types of nanofibers: carbon nanocoil (CNC) and carbon nanotube (CNT). The metal catalyst loading was confirmed by thermo-gravimetric analysis (TGA), electron microscopy, and X-ray diffraction (XRD). Transmission electron microscopy (TEM) and XRD revealed that the diameter of PtRu catalyst nanoparticles loaded on reduced GO (rGO) and AcB were ~2 nm and was the smallest among all the samples. Shifts in Pt (111) XRD peaks of CNC and CNT were larger than those of AcB, Vulcan, and rGO. These results suggest that the diameters of catalyst nanoparticles became smaller by loading on the carbon nanoparticles with a large surface area including rGO, AcB, and Vulcan. Loading onto the carbon nanofibers enhanced the degree of PtRu alloying.

Selected publications and works

Yoshiyuki Suda, Yoshiaki Shimizu, Masahiro Ozaki, Hideto Tanoue, Hirofumi Takikawa, Hitoshi Ue, Kazuki Shimizu, Yoshito Umeda, "Electrochemical properties of fuel cell catalysts loaded on carbon nanomaterials with different geometries", Materials Today Communications, 3 (2015) 96-103


Carbon nanocoil (CNC), energy devices, fuel cell, electric double layer capacitor (EDLC), catalyst loading, nanoparticle, catalytic activity

Theme2:Electrical and mechanical properties of carbon nanocoils using nano-manipulation technique


CNC is several micrometers long and less than 1 micrometer diameter. By developing nano-manipulation technique, it is now possible to handle one CNC. We fix a CNC on a substrate in a focused ion beam (FIB) instrument, and then facture the CNC with a tensile load. Using the CNC spring index, we estimate the maximum to average stress ratio on the fractured surface to range from 1.3 to 1.7, indicating stress concentration on the coil wire inner edge. Scanning electron microscopy (SEM) confirms a hollow region on the inner edge of all fractured surfaces. The fracture mechanism is the same for macroscopic coil springs (used for automobiles) and CNCs.

Selected publications and works

Yasushi Nakamura, Yoshiyuki Suda, Ryuji Kunimoto, Tamio Iida, Hirofumi Takikawa, Hitoshi Ue, Hiroyuki Shima, "Precise measurement of single helical carbon nanofibers using a focused ion beam technique", Applied Physics Letters, 108 (2016) 153108-1-4

Taiichiro Yonemura, Yoshiyuki Suda, Hiroyuki Shima, Yasushi Nakamura, Hideto Tanoue, Hirofumi Takikawa, Hitoshi Ue, Kazuki Shimizu, Yoshito Umeda, "Real-time deformation of carbon nanocoils under axial loading", Carbon, 83 (2015) 183-187

T. Yonemura, Y. Suda, H. Tanoue, H. Takikawa, H. Ue, K. Shimizu, Y. Umeda, "Torsion fracture of carbon nanocoils", Journal of Applied Physics, 112(8) (2012) 084311-1-4


Carbon nanocoil (CNC), nano-manipulation, focused ion beam (FIB), torsion fracture

Theme3:Influence of atmospheric non-equilibrium plasma on living cell model


Plasma medicine has been studied for the applications of blood coagulation and skin sterilization because of its non-contact medical treatment. This study aims to elucidate the interaction between plasma and cell membrane by treating artificial lipid bilayer of cell membrane by dielectric barrier discharge (DBD) and by observing the behavior of the lipid bilayer.

Selected publications and works

Ryugo Tero, Ryuma Yamashita, Hiroshi Hashizume, Yoshiyuki Suda, Hirofumi Takikawa, Masaru Hori, Masafumi Ito, "Nanopore Formation Process in Artificial Cell Membrane Induced by Plasma-Generated Neutral Oxygen Species", Archives of Biochemistry and Biophysics, 605 (2016) 26–33

Yoshiyuki Suda, Ryugo Tero, Ryuma Yamashita, Kota Yusa, Hirofumi Takikawa, "Reduction in lateral lipid mobility of lipid bilayer membrane by atmospheric pressure plasma irradiation", Japanese Journal of Applied Physics, 55 (2016) 03DF05 (6 pages)

Yoshiyuki Suda, Akinori Oda, Ryo Kato, Ryuma Yamashita, Hideto Tanoue, Hirofumi Takikawa, Ryugo Tero, "Computational study of temporal behavior of incident species impinging on a water surface in dielectric barrier discharge for the understanding of plasma-liquid interface", Japanese Journal of Applied Physics, 54(15) (2015) 01AF03-1-6

Ryugo Tero, Yoshiyuki Suda, Ryo Kato, Hideto Tanoue, Hirofumi Takikawa, "Plasma irradiation of artificial cell membrane system at solid–liquid interface", Applied Physics Express, 7 (2014) 077001-1-4


Atmospheric non-equilibrium plasma, dielectric barrier discharge (DBD), lipid bilayer, gas-liquid interface, plasma medicine

Title of class

Physics 2
Complex Function Theory
Applications of Electrical Engineering
Advanced Electrical Systems 2
Electrical Technology and Materials

Others (Awards, Committees, Board members)

2007 Best Paper Presentation Award, 2007 Japan-Korea Joint Symposium on Electrical Discharge and High Voltage Engineering
1997 British Cryoengineering Society/Cryogenics BEST Paper Award for 1996

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