研究者詳細 - 徳永　智春

論文 - 徳永　智春

分割表示 161 件中 101 - 120 件目／全件表示 >>

Methane Decomposition for Hydrogen Production by Catalytic Activity of Carbon Black under Low Flow Rate Conditions Open Access

Tomoharu Tokunaga, Naoyuki Kishi, Kenya Yamakawa, Katsuhiro Sasaki, Takahisa Yamamoto

ACS-Japan 125 巻 ( 4 ) 頁： 185-189 2017年

Intentionally Encapsulated Metal Alloys within Vertically Aligned Multi-Walled Carbon Nanotube Array via Chemical Vapor Deposition Technique

Hayashi Yasuhiko, Inoue Hirotaka, Hayashi Takuma, Hada Masaki, Nishikawa Takeshi, Tokunaga Tomoharu, Amaratunga G. A. J.

2017 IEEE INTERNATIONAL CONFERENCE ON MANIPULATION, MANUFACTURING AND MEASUREMENT ON THE NANOSCALE (3M-NANO) 頁： 357-361 2017年

Intentionally Encapsulated Metal Alloys within Vertically Aligned Multi-Walled Carbon Nanotube Array via Chemical Vapor Deposition Technique 査読有り

Yasuhiko Hayashi, Hirotaka Inoue, Takuma Hayashi, Masaki Hada, Takeshi Nishikawa, Tomoharu Tokunaga, G. A. J. Amaratunga

2017 IEEE INTERNATIONAL CONFERENCE ON MANIPULATION, MANUFACTURING AND MEASUREMENT ON THE NANOSCALE (3M-NANO) 頁： 357 - 361 2017年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

This paper presents a growth and characterization of vertically aligned PdxCo1-x alloy encapsulated inside Multi-Walled Carbon Nanotube (MWCNT) arrays on Pd/Co thin layers coated on Si substrate by a dc bias-enhanced plasma chemical vapor deposition (CVD) method. The Metal Alloy Encapsulated within MWCNTs (MAE-MWCNTs) were characterized by a scanning electron microscope (SEM) and a transmission electron microscopy (TEM). The SEM images show the teardrop-shape particles encapsulated within the tube top of MWCNTs. A vibrating sample magnetometer was used to study the magnetism of a large number of MAE-MWCNTs on Si substrate at room temperature. The hysteresis loop of the ME-MWCNTs shows clear ferromagnetic behavior and the easy axis of magnetization is parallel to the MEA-MWCNT tube axis, as can be elucidated from the large coercive fields and remanence values. Moreover, TEM off-axis electron holograms were used to study the magnetism of the individual MAE-MWCNT or the two pair of MAE-MWCNTs. Based on electron holography, we have successfully obtained the saturation magnetization of 0.7 T and 1.12 T for the individual MAE-MWCNT with diameters of 41 nm and 83 nm, respectively.

Web of Science

Double target sputtering into liquid 査読有り

Mai Thanh Nguyen, Tetsu Yonezawa, Yuan Wang, Tomoharu Tokunaga

Materials Letters 171 巻 ( 15 ) 頁： 75-78 2016年

Earth-Abundant and Durable Nanoporous Catalyst for Exhaust-Gas Conversion 査読有り

Takeshi Fujita,Hideki Abe,Toyokazu Tanabe,Yoshikazu Ito,Tomoharu Tokunaga,Shigeo Arai,Yuta Yamamoto,Akihiko Hirata,Mingwei Chen

Advanced Functional Materials 頁： 1-8 2016年

Matrix Sputtering into Liquid Mercaptan: From Blue-Emitting Copper Nanoclusters to Red-Emitting Copper Sulfide Nanoclusters 査読有り

Matteo Porta, Mai Thanh Nguyen, Tomoharu Tokunaga, Yohei Ishida, Wei-Ren Liu, Tetsu Yonezawa

Langmuir 32 巻頁： 12159-12165 2016年

Hard-Templating Synthesis of Macroporous Platinum Microballs 査読有り

Hiroaki Shirai, Yu-Yuan Huang, Tetsu Yonezawa,* Wei-Chen Chang, Tomoharu Tokunaga, Saad Alshehri, Bo Jiang, Yusuke Yamauchi, and Kevin C.-W. Wu

Materials Letters 164 巻 ( 1 ) 頁： 488-492 2016年

Synthesis of zirconium oxynitride in air under DC electric fields 査読有り

Nobuhiro Morisaki, Hidehiro Yoshida, Koji Matsui, Tomoharu Tokunaga, Katsuhiro Sasaki, Takahisa Yamamoto

Applied Physics Letter 109 巻頁： 083104(1)- 083104(4) 2016年

Formation of grain boundary second phase in BaTiO3 polycrystal under a high DC electric field at elevated temperatures 査読有り Open Access

Hidehiro YOSHIDA, Akinori UEHASHI, Tomoharu TOKUNAGA, Katsuhiro SASAKI, Takahisa YAMAMOTO

Journal of the Ceramic Society of Japan 124 巻 ( 4 ) 頁： 388-392 2016年

Matrix Sputtering into Liquid Mercaptan: From Blue-Emitting Copper Nanoclusters to Red-Emitting Copper Sulfide Nanoclusters 査読有り

Matteo Porta, Mai Thanh Nguyen, Tomoharu Tokunaga, Yohei Ishida, Wei-Ren Liu, Tetsu Yonezawa

Langmuir 32 巻頁： 12159-12165 2016年

Hard-Templating Synthesis of Macroporous Platinum Microballs (MPtM) 査読有り

Hiroaki Shirai, Yu-Yuan Huang, Tetsu Yonezawa,* Wei-Chen Chang, Tomoharu Tokunaga, Saad Alshehri, Bo Jiang, Yusuke Yamauchi, and Kevin C.-W. Wu

Materials Letters 164 巻 ( 1 ) 頁： 488-492 2015年

Enhancement of sintering rates in BaTiO3 by controlling of DC electric current 査読有り Open Access

Akinori Uehashi, Hdehiro Yoshida, Tomoharu Tokunaga, Katsuhiro Sasaki, Takahisa Yamamoto

123 巻 ( 6 ) 頁： 465-468 2015年

In-situ observation of carbon nanotube yarn during voltage application 査読有り

Tomoharu Tokunaga, Yasuhiko Hayashi, Toru Iijima, Yuki Uesugi, Masaki Unten, Katsuhiro Sasaki, Takahisa Yamamoto

Micron 74 巻頁： 30-34 2015年

Environment-Sensitive Thermal Coarsening of Nanoporous Gold 査読有り Open Access

Satoko Kuwano-Nakatani, Takeshi Fujita, Kazuki Uchisawa, Daichi Umetsu, Yu Kase, Yusuke Kowata, Katsuhiko Chiba, Tomoharu Tokunaga, Shigeo Arai, Yuta Yamamoto, Nobuo Tanaka, Mingwei Chen

MATERIALS TRANSACTIONS 56 巻 ( 4 ) 頁： 468-472 2015年

Plasma-Induced Tungsten Doping of TiO2 Nanoparticles for Enhanced Photocatalysis using Visible Light 査読有り

17 巻 ( 38 ) 頁： 24556-24559 2015年

Atomic Observation of Catalysis-Induced Nanopore Coarsening of Nanoporous Gold 査読有り

Takeshi Fujita, Tomoharu Tokunaga, Ling Zhang, Dongwei Li, Luyang Chen, Shigeo Arai, Yuta Yamamoto, Akihiko Hirata, Nobuo Tanaka, Yi Ding, Mingwei Chen

Nano Letters 14 巻 ( 3 ) 頁： 1172-1177 2014年

Mechanism for the Precipitation of Carbon on the surface of an Ni Catalyst 査読有り

Tomoharu Tokunaga, Hiroki Tasugi, Natsuki Iwamoto, Katsuhiro Sasaki, Takahisa Yamamoto

AMTC Letters ４巻頁： 60-61 2014年

Domain Structure of LSAT Single Crystal 査読有り

Shunsuke Okada, Katsuhiro Sasaki, Tomoharu Tokunaga, Satoshi Kobayashi, Takahisa Yamamoto

AMTC Letters ４巻頁： 34-35 2014年

Yttrium Segregation Behavior to Necks during Sintering in Aluminum Doped with Yttria 査読有り

Tomoya Sako, Tomoharu Tokunaga, Katsuhiro Sasaki, Hiroaki Yoshida, Takahisa Yamamoto

AMTC Letters 4 巻頁： 36-37 2014年

In Situ TEM Observation of Double-Wall TiO2 Nanotube 査読有り

Chaorui Xue, Takashi Narushima, Yohei Ishida, Tomonaru Tokunaga, Tetsu Yonezawa

Chemistry Letters 43 巻 ( 9 ) 頁： 1514-1516 2014年

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